Slashdot Log In
Apple's G5 Speeds Challenged
Posted by
CmdrTaco
on Tue Jun 24, 2003 08:02 AM
from the some-hype-with-your-coffee dept.
from the some-hype-with-your-coffee dept.
An anonymous reader was the first of a seemingly infinite stream of people to submit a URL to an argument that makes the case that the G5 isn't quite what Apple wants you to think of it. The evidence? Apple's own press material. Worth a read.
This discussion has been archived.
No new comments can be posted.
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
Full
Abbreviated
Hidden
Loading... please wait.
Think Different (Score:5, Funny)
Re:Think Different (Score:5, Interesting)
While this eliminates one variable from the comparison, it also eliminates a hefty percentage from the SPEC numbers one can get with Intel's compiler.
Parent
Re:Think Different (Score:5, Interesting)
gcc produces inferior code on both platforms. Intel's C compiler kicks the shit out of gcc, and likewise metrowerks C and IBM's C compiler kick the shit out of gcc too.
gcc's x86 backend has had a lot more work than the ppc backend.
It would be interesting to see intel's C on x86 vs IBM's C on PPC. Compare chips and compiler writers with one stone :)
Parent
Re:Think Different (Score:5, Interesting)
Parent
Re:Think Different (Score:5, Insightful)
Of the benchmarks displayed I'd believe the Photoshop and Mathematica ones to some extent. The emagic comparison seems a little fishy though. The composition on the PC didn't look all that complicated, it shouldn't have sputtered and died the way it did.
That said, I'm sure each of the current leading CPUs shows better performance in one area or another. I'm sure things suited for altivec optimization will be way faster on the G5, and things suited for raw integer performance will be faster on the P4.
In any case, we have a rather fast, 64 bit, UNIX-based machine, that exhibits excellent polished design both software and hardware wise. I for one am lusting after a Dual 2 GHz G5 with at least 1 GB of DDR RAM, and I can't wait to see how it performs with Panther.
Parent
Re:Think Different (Score:5, Insightful)
I think it's pretty obvious Apple did that here, but I'll still use my Mac's anyway. No, I am not a Mac zealot who thinks that Intel or Gates, or whoever it is that day is the devil. I have a PC too. I enjoy building them. I just use my Mac for most things because I'm more comfortable with it. Bad marketing won't turn me off from a product - because then I'd never buy anything! Which actually might be a good thing....
Parent
I'm shocked, shocked, (Score:5, Funny)
Re:I'm shocked, shocked, (Score:5, Funny)
Parent
eh? (Score:5, Funny)
translation
i am too stupid to round up.
Standard Pratice (Score:5, Informative)
When asking the pricing managers (which work for the chain, not an individual store) they replied that there was a study once done, indicating that there is a psychological tendancy to shy away from certain "maker" numbers as being too big. For example, the masses statistically believed that twenty dollars was too much to pay for item x, but for some reason, nineteen ninety-nine was not too much to pay for the same item. Funny thing is that with the same item, eighteen dollars would again be too much, but seventeen ninety-five wouldn't.
Even if the study is flawed or bogus, it is still being taught in the "front-line" marketing schools, (ie. grocery, drug-store, clothing, etc.) , and so I expect we will see nineteen ninety-five for many many years to come.
Parent
Apple's benchmarks (Score:5, Insightful)
Apple is always a little sketchy when it comes to speed measurements. I can't count how many questionable run-offs Steve Jobs has demonstrated during his keynotes.
They're always a little suspect. I love Apple as much as anyone, but their talk of the megahertz myth and the amazing clock cycle of the G4/G5 and the biased tests they use are starting to sound a little shrill. Apple needs to admit that their machines aren't as fast as the fastest Intel has to offer. They're much cleaner and much more elegant, though, and that's why they're in the market. That's what they should stress, since it actually attracts customers -- rather than THE NEED FOR SPEED.
Different Benchmarks (Score:5, Insightful)
Really smart guy (Score:5, Funny)
Does anyone care anymore? (Score:5, Insightful)
The only things that really need speed are things like 3d rendering, video compression and compiling large appllications. 3D rendering in games is influenced by the speed of the graphics card a lot more than the speed of the CPU, so we're left with the long slow scenes. Personally, it makes very little difference to me if a rendering a scene or compressing a video takes 30 minutes rather than 40. If I can kill 30 minutes, I can kill another 10 quite easily.
In the past, I'd have been able to tell you whether I was using a 20MHz or a 25Mhz 386 just by using it. I can hardly detect the difference between a 1.5GHz machine and a 3.0GHz machine without using a benchmark.
In the end, it's just numbers.
The Photoshop and Mathematica benchmarks rock (Score:5, Interesting)
I watched the video. (http://stream.apple.akadns.net/ - requires QuickTime). Now, I'm sure there's many ways you could tweak the benchmarks and so forth but the Photoshop and Mathematica benchmarks rocked. The G5 was 2x faster than the Xeon.
I used to get involved doing benchmarking back in the good old days of Whetstone when I worked on supercomputers. Every manufacturer had a different nasty tweak to the compilers that were pulled out only when it was time to do benchmarks for a customer. The mantra then as now was: the best benchmark is the app you want to run (since most buyers of supercomputers write their own apps, porting them for a benchmark was a possibility).
The G5's may not be the hottest thing on the planet but they're close enough to get Apple back in the ball game. Nice systems architecture, nice case and the claim is they're quiet as well. Oh, and don't forget you can put in 8GB of RAM. Now even OS X doesn't need to swap :-)
What about the backplane???? (Score:5, Interesting)
The fast backplane will speed up IO, which is a common bottleneck. 1GHz for a PC backplane is huge. The only machine I had seen a 1GHz backplane in so far is a HP-UX server. It cost wayyy more than $2000 or even $3000.
I really believe that with this new chip alliance with IBM Apple will finally be able to put that "the OS is really cool, but PCs are always faster" stuff behind them.
Yesterday was a good day for apple.
Benchmarks...who cares? (Score:5, Funny)
Go use a machine, for tasks you'd typically perform -- that's the only benchmark that matters.
But if you must assign a number to the size of your virtual phallus, by all means, benchmark away...
Single vs. Dual processor (Score:5, Informative)
1) This is Apple's Pro machine and many of the users are in the Graphic Arts, Audio and Film industry. The most siginificant programs in these fields do get optimized for the Mac platform.
2) I don't know about you, but it is normal for me to be doing several things at once on my computer. Listening to music, downloading email, munging video, plus about a hundred background tasks. The OS itself balances these separate tasks between the processors, so there is a very real and significant advantage to the dual processor even if the individual programs don't take advantage.
-I have no Sig yet I must scream...
Interesting Article but... (Score:5, Insightful)
Perhaps what he meant to say is: "If we are going to use bogus benchmarks, let's compare them to the bogus ones from the competition."
Please feel free to educate yourselves... (Score:5, Informative)
http://arstechnica.com/cpu/2q99/benchmarking-1.
This will give you at least a basis for understanding why benchmarking is used, and what makes or breaks any given set of results. Also, feel free to argue about anything and everything that is said about these benchmarks, since, apparently, everyone of you is in the benchmarking labs day in and day out, testing systems and looking at the results on a scientific level.
I also think benchmark scores are, quite frankly, marketing bullshit. A processor designer can tweak a program and a compiler any number of ways to increase thier scores. The true test would be to use the SPEC benchmark suite with no flags set on the compiles for either platform. That way you are testing just the base processor, with no SIMD instructions, no disabling of the software prefetch algorhythms, no "cheats" as it were. Then test those same systems with every trick in the book thrown in. Then look at the difference. This will probably give you a better picture of the performance you will see in real world activities.
If you have a machine that absulotely sucks donkey when using no "cheats" and then you see this amazing boost in performance when the "cheats" are enabled, you probably are dealing with a highly optimized and specialized instruction set, which can be either very good for specific applications, but absolutely horrible for programmers who don't have access to, or don't bother to research, the abilities of that processor.
These are the benchmarks I'm interested in most. And it'll be at least late September before we see any of that.
Also, while all this is interesting, in an intelllectual sort of way, what about the actual perfomance gains over the current crop of G4's? Why not take a look at the difference between the SPEC scores of the dual 1.42GHz G4 towers, vs. the dual 2GHz G5's? That alone will tell you more about the increase in speed and power that has been delivered. If Apple had been smart, instead of trying to impress and piss off the x86 sparkheads they should have posted those scores as well, to give a real side by side comparrison between the speed and power of the G5 vs the bottlenecked, processor starving, gimp that is the G4. But that would make too much sense, wouldn't it? And you know marketing is all about confusing your consumer into beleiving that the latest and greatest is really what they want, not some old machine from 3 months ago...
This isn't something I find relevent (Score:5, Insightful)
Today we get the backlash and debunking. I honestly don't know if it's completely true or not but I'm inclined to believe it. I've grown accustomed to the idea that benchmarks and anything else like them (side by side tests of any kind) can't be trusted so this seems to fit.
The only thing that really makes any difference to me personally is how much faster the G5 is than the G4 it's replacing. The rest of it I just don't care about.
I use a Mac for a lot of reasons and flat out speed isn't one of them. It has to be fast enough obviously but it doesn't have to be the fastest and never has had to be the fastest.
I use a Mac because I have found it to be very stable and a pleasure to work and game on. If the benchmarks were rigged then it's a shame. They didn't need to do it and it wasn't worth the risk of negative press IMO.
Re:This isn't something I find relevent (Score:5, Insightful)
That's the key. Windows PCs have been beyond the point of general sluggishness for a some time now. I'd say they passed that point when the PII (yes, 2) hit 450-500MHz or so. Past that point, especially with the ridiculous speeds available on even the lowest end Dell, speed has lost most of its meaning except to the hardcore hardware fanboys (and people with specialized, professional needs). OS X is heavier duty than Windows, and the sluggishness is still there on the lower end G4 processors. The G5 finally puts Macs in the realm of not caring, just like PCs.
The big difference, though, is that you have to pay quite the premium price to get a Mac in the "plenty fast enough" range, whereas you can go to dell.com and pick *anything*. In short, the G5 is a toy for the rich until the PPC970 starts showing up in the $1300--with LCD screen--iMac. That will probably happen in January, IMO.
(I just priced a "bottom end" 2.2GHz, 256MB Dell at $658 before a $50 rebate. They also have free shipping--normally about $100--every few weeks.)
Parent
Who cares, really? (Score:5, Insightful)
B. Benchmarks are very rarely impartial. Whoever is footing the not inconsiderable bill for a properly-done benchmark will have a result they want to see, and the benchmarkers can do a lot to make sure they do see it.
C. "Perception is reality" is a well-known saying in marketing. It doesn't actually matter whether the perception is correct. If Joe Sixpack believes he has bought the fastest PC in the world, he will be happy. More so since he most likely has nothing on hand to compare it to.
D. The speed this industry moves at, there will be a faster one along in a month or less, so if you really want something faster, wait for it.
E. All this debating about which is faster is more like masturbating. And "Masturbation, although an inherently pointless way to pass time, is at least enjoyable. Comparing PC performance is equally pointless, but rather less fun. The conventional epithet applied to those who engage in the former to excess is equally applicable to those who persist in the latter."
On the Price Comparison and SMP (Score:5, Informative)
With regard to price, if you're after a high-end system, he represents that the high end of the Dell line comes in at $3680, yet rapidly returns to promoting the idea that a $2000 Dell is equivalent. In an effort to configure up an Intel system comparable to the new high-end Apple PowerMac G5, I ran the Dell configurator. It clocks in at $3939:and that's with a lesser video card and a smaller, slower IDE hard drive (add $840 for SCSI, a better comparison with Serial-ATA). I don't think I was being unfair in my selection of components. (OK, add $30 for a USB floppy on the Mac if necessary)
This guy certainly has a point about the non-optimized Intel benchmarks, but he reveals his prejudice by not offering a fair price comparison.
best flame ever (Score:5, Funny)
People that go to ivory league schools that live in trailers are a very low population, lets say 1% so since there are 99% of the people living in houses then you can clearly see that people that live in trailers are stupid, when compared to they're counter parts. Or put it this way, any finite number divided by infinity results in a number so small it does not exists. So any people that live in trailers that go to ivory league school you meet in passing are just figments of your imagination. Point is if you like Macintosh use it, if you don't then well don't use it.
Heh. That sure dispels this guy's critique of Apple's benchmarks, eh?
Re:spl=troll (Score:5, Funny)
Ummm...this is
Are you new here?
(yeah, yeah, pot, kettle, black)
Parent
Re:similar info from a different source (Score:5, Informative)
Parent
Re:spl=troll (Score:5, Insightful)
If you're talking about this [haxial.com] (section entitled "Apple Copies Ideas From Microsoft") then you'll find that he admits that Microsoft copies stuff from Apple, but that Apple have copied things from Microsoft too. Which wouldn't seem a too unreasonable claim.
If you're going to claim someone is a troll, the least you could do is give us an example which isn't guaranteed to mislead us.
Parent
Re:spl=troll (Score:5, Insightful)
Are you going to deny that Apple cheated at the benchmarks by disabling various optimizations on the competition? Are you going to deny that most software uses integer math, as one "software coder" clearly did (hint: i write a lot of software, and integer math practically always dominates)?
The guy may, or may not be a troll. However, the sheer amount hate mail, and the level of it, was stunning. What kind of people write stuff like that? Very few of them even attempted to address the guys points, and those that did made a hash job of it (nobody uses int math? wtf?).
The fact is that anybody outside the Mac community, having read that essay, is going to come away with a bad impression of said community. Nobody deserves to get hate mail like that for pointing out the other side of the statistics.
Parent
Re:spl=troll (Score:5, Interesting)
Did you notice how almost all of the hatemail was addressing him in the third person?
He went onto a discussion board somewhere about the post (probably MacNN, probably one of the worst reputation Mac websites in terms of brainpower) and just cherry picked the comments he could take apart easily.
It's not like he actually *got* that hatemail. He didn't even post an email address with the article.
Isn't it funny how you can bend things to make you look favorable - just like Apple may have done?
Parent
Re: whatever (Score:5, Insightful)
> They're giving us a desktop UNIX running on 64-bit hardware, what else can you ask for? sheesh
Who wants 64-bit for 64-bit's sake? I want fast, cheap computation. I'd be happy with an 8-bit computer if it gave sufficient bang for the buck.
Parent
Re: whatever (Score:5, Funny)
Parent
Quite (Score:5, Insightful)
Parent
Re:Quite (Score:5, Funny)
Oh, Please. We all know we'll never ever need more than 640k.
Parent
Re:Quite (Score:5, Informative)
Parent
Re:Quite (Score:5, Informative)
-sirket
Parent
Re:Quite (Score:5, Insightful)
The days of 512M machines on the desktop are coming, and so are the days of 1G gamer desktops. God only knows what Doom III is going to require.
Parent
Re:Quite (Score:5, Funny)
Why, I remember how appalled I was when my friend had an Apple IIgs with 1 MB - 1 megabyte!!! - of RAM, a decade or so ago. What kind of hedonist needs that much? Bah.
These damn kids today, with their gigabytes and their FireWire and their "rock 'n' roll" music and the hair and the clothes...
Parent
Re:Quite (Score:5, Informative)
Obviously you have never run CAE/CAM programs. (That being Computer Aided Engineering / Computer Aided Manufacturing.. I-DEAS, Pro Engineer, SolidWorks, Catia, etc.) This is the hard core stuff that Boeing, Ford and Toyota use that cost hundreds of thousands of dollars for one license. At my university, the undergrads get to use it on P4 machines and the grad students get to use it on 64 bit HP-UX workstations.
Even if you use a fairly simple FEA (finite element analysis) on something, for example finding the levels of stress in some objects you have modelled when it is bent in different ways, or modelling the flow of water or air through some pipe bends, this amount of RAM is very desireable. Basically the program builds and solves a bunch of 2000x2000 matrices for you. Even a simple one like the pipe bend took something like 3 hours on a P4/512MB and there was a multi-GB swap file needed. I was in the lab very late that night. That is where super-large amounts of RAM are necessary.
Parent
Re:Quite (Score:5, Interesting)
I would say CAD only pays the bills at an engineering or architecture firm, and I think the best CAD packages are currently for PC. While the new apple box certainly opens the door up to porting to Apple, the lag time before Intel comes out with 64 bit proccessors wont be long enough for significant entrenchmant.
Parent
Re:whatever (Score:5, Insightful)
Listen, Apple made a good product because they needed to stay in business. They didn't do it out of the good of their hearts. And their good product in no way changes the fact that I don't appreciate being lied to by corporations.
Don't get me wrong, this is not the world's biggest lie or corporate misdeed. I don't put much faith in benchmarks anyway, and I wouldn't make my decision between a Mac or a PC based on them (although for others the specs might be more important). But it's still sleazy. And it's very unfair to act like it's "ungrateful" or "trollish" to demand that Apple set up legitimate benchmarking tests.
Parent
Re:whatever (Score:5, Insightful)
Yeah, me too. But unlike the Mac, I could not run Office, Photoshop, function as a web server, surf the web, compile code, run bioinformatics searches, do molecular modeling and have wonderful text aliasing all at the same time. Now with OS X, I can do all this and network seemlessly with Wintel and UNIX machines while maintaining my sanity by only having one software library to keep up with and have one system on my desk instead of three. Oh, and when I am on the road (like now on the other side of the country), I can take all of this with me by using a Powerbook.
No other company has been able to give me these tools, and for that.....I have to say, "Thank you Apple Computer".
Parent
Re:whatever (Score:5, Funny)
Misleading Prices
Both Apple and Dell are guilty of using misleading prices. For example, Apple gives the price of the low-end G5 as "$1999", and the high-end G5 as "$2999". In other words, they have subtracted $1 from a $3000 computer to make it seem cheaper, which is absolutely ridiculous. This demonstrates that both Apple and Dell are willing to mislead people when stating their prices.
Next crackpot, please.
Parent
Re:Benchmarking Across Platforms (Score:5, Insightful)
Apple has deliberately turned off processor features on the other platforms that would have led to their 'fastest in the world' claim being untrue. That's the point of the article. Cross-platform benchmarking IS hard, but deliberately crippling what you benchmark against in order to look better makes it seem that your software/hardware/whatever just isn't as good as what you're comparing it to...
Parent
Re:Benchmarking Across Platforms (Score:5, Insightful)
Parent
Re:Benchmarking Across Platforms (Score:5, Insightful)
The Dell/Intel benches were provided by Dell/Intel, they optimised them as much as they could.
However, what he didn't include was benchmarks for a G5 which had been crippled by Dell and Intel..
I usually hate analogies, but sometimes it's my only way of getting my point across:
If Ford tweaks their engines and suspension set up before a test. OK!
If Nissan tweaks their engines and suspension set up before a test. OK!
If Nissan tweaks their engines and suspension set up, and pours sugar in the Ford's "gas" tank before the test. NOT OK!
Parent
Re:Benchmarking Across Platforms (Score:5, Insightful)
OK, I mostly skimmed the article, but he's among other things complaining that they turned off SSE2. May I mention that from what I could gather, the benchmarks used on the Apple platforms had NO Altivec optimisation? With that in mind it seems that disabling SSE2 was simply done to level the field. If there had been Altivec optimisations, then for comparison's sake it would make much better sense to use Altivec and SSE2. Actually, they might have chosen to disable SSE too, but they didn't!
The other feature he's complaining about is the disabling of hyperthreading. From other benchmarks I've seen before, hyperthreading in SMP systems usually results in equal or slower performance, or at most a 10% addition in certain benchmarks. It was probably better to leave it off.
Finally, about the discrepancy between Veritest's/Dell's/Intel's benchmarks, this is to be expected. Veritest compiled the benchmarks with GCC 3.3, and certainly used different compiling options and different testing options than Dell used. Unless you use the same options and methodology on every test, comparing benchmarks is useless.
I'm not saying Veritest and Apple didn't do their best to look good, of course they did! But at least you have to give them credit for going with an independent firm with a full report (where everything is laid out), instead of absurd and evidently fabricated application benchmarks like they've done in the past.
As another poster mentioned, benchmarking is HARD, and harder across platforms, especially on a new CPU platform with no optimizations and no way to use some of the CPU features. When we get a benchmark version that allows for full use of al the features of the 970 (G5) and the x86 CPUs, then we might get a clearer picture. It also doesn't remove the fact that these machines are MUCH, MUCH better than the G4s, or that Apple also promised the processor would scale to at least 3GHz within a year.
Oh of course one of his arguments about his righteousness is "Look at all these Mac fanatics who flame me". He's not much better than them, from what I can see. One fanatic from one camp doesn't make all of them fanatics, and doesn't validate his points one iota (neither does flaming him destroy his points, which is why intelligent rebuttal would be better, but I have the feeling he would most likely not publish that).
Parent
Re:Benchmarking Across Platforms (Score:5, Informative)
Parent
Re:Benchmarking Across Platforms (Score:5, Insightful)
I'm running 1.3Ghz Athlon at home and a 1.2Ghz dell laptop at work. These machines are obsolescent by today's marketing standards.
With the exception of Sim City 4000 (which is a fundamentally slow program) I've never had any kind of chronic performance problem.
The organziation where I work has over 75,000 PCs and about 2,500 servers. 75% of these are 700Mhz or less and about 40% are 350-500Mhz. The only performance problems we run into are network problems... nobody has complained about a slow PC in years.
Parent
Re:Flaming (Score:5, Interesting)
It seems to me that if somebody wanted to use an inferior product, the first thing they'd do is develop a thick skin and at a minimum ignore the criticism being lobbed at their platform of choice. That, or choose to adopt something that seems to work better for the majority so that they don't have to feel left out all the time; obviously when you get to the point of chewing out people who are trying to show you why your choice is flawed it's become a popularity contest for you already (competing, not computing).
Parent