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Futuremark Replies to Nvidia's Claims
Nathan writes "Tero Sarkkinen, Executive Vice President of Sales and Marketing at Futuremark, has commented on the claims by Nvidia that 3DMark2003 intentionally puts the GeforceFX in bad light, after Nvidia had declined becoming a member of Futuremark's beta program. This issue looks like it will get worse before it gets better." ATI also seems to be guilty of tweaking their drivers to recognize 3DMark.
3DMark will look totally sweet because it's *optimised* for both cards.
Its about the OEMs as much or more than the consumer market. They watch the benchmarks closely -- and make decisions based on results.
This is where the money really is, and what is worth fighting for.
ATi's tweak yields a 1.9% gain by rearranging the instructions 3dmark issues it's hardware. Anyone familiar with assembly language knows that properly arranging your instructions prevents stalls; the end result, however, is exactly as intended. It sounds to me that this is what ATi did. nVidia, on the other hand...40% gains with very obvious visual errors is..well, wrong.
People keep begging that nvidia release their drivers under a open license. Well i guess we now know why they don't. /Esben
"Nobody really checks their email any more. They just delete their spam"
SCO: Hey, we have a patent on cheating, pay us money!
This is why you need many forms of evaluations to properly test something. Just running one program to show you pretty pictures is not going to give any meaningful result. You need to stress test the card in other ways.
And, since one of the main reasons people will buy this is to play flashy and pretty games, ignoring the performance in those games is rediculous.
Back when nvidia aquired 3dfx, they began to merge their development teams. The fx is the first card by nvidia to be developed by engineers from both the nvidia and 3dfx groups.
... But who knows! I'm no fortune teller ...
Of course it will work better when you do it their way; It was 3dfx's strength in the beginning, and its downfall in the end.
But I believe that their current development team has yet to hit its stride, and future offerings will see the trophy going back to nvidia...
Online Starcraft RPG? At
Dietary fiber is like asynchronous IO-- Non-blocking!
ATI also is crafty at tweaking their drivers to suck. They should be working on decent drivers instead of cheating on stupid benchmarks to get +1.9%.
I bought a Radeon 9700 Pro. The driver issues almost make it not worth the increased FPS over my Ti4400.
The refresh rate problem in XP is annoying as hell. ATI handles it even worse than NVidia, where you set your "maximum" refresh rate and your "highest" resolution, and it assumes that all lower resolutions can only handle that refresh rate.
There's no way to tell your ATI card, "My monitor can do 1280x1024 @ 85hz, but 1600x1200 @ only 75hz." You either get 75hz in everything if you want 1600x1200, or you get 85hz up to 1280x1024, and have to avoid 1600x1200 use lest ye risk getting "frequency over range".
NV handles it better with the driver, allowing you to set maximum refresh rates for every resolution individually.
These refresh rate tweaking programs don't help either, since half the games out there choke when you use them. PC 3d is in a bit of a sorry state right now, and I'm tired of it.
# Erik
This whole episode has turned into a big mess. NVDA seems to be the bad guy in all of this. Their DX-9 product was delayed and their existing products where only DX 8.0*. The benchmark heavily favours DX-9 parts and NVDA's existing lineup was/is getting smoked in the benchmark by it's main (only) competitor. They decided to go on the offensive and try to kill off this benchmark. The 30 person company that produces 3D Mark have stood their ground against the multi-billion dollar NVDA. NVDA instead of admitting that their Pixel Shader is quite slow when running against 2.0 specs insteads tries to decieve and FUD their way out of it. Looks like they got more than just some patents when they purchased 3DFX...
Now they have painted themselves into a corner and how this will turn out is anyone's guess.
*DX8.1 has PS 1.4 which is actually much closer (AFAIK) to PS 2.0 than PS 1.3 (DX8).
What!? Two giant corporations actually doing something MS-like to make themselves more appealing?! That's unheard of! Why, one might think this is a ploy to increase marketshare! Corporations are our friends, they would never manipulate the people. Damn the man!
IGB: More fun than eating oatmeal!
AFAIK, ATI displays the graphics on screen properly, the drivers are just optimized for the benchmark. One could still consider this cheating. NVIDIA however does not display the graphics properly, it really does cut corners (literally) to get higher scores. ATI got an extra 3% from cheating. NVIDIA got a whopping 24% higher scores from cheating! take a look at the extremetech screenshots:
, a= 41574,00.asp
http://www.extremetech.com/print_article/0,3998
From what I've heard, Nvidia totally replaced the shader program with ones that they wrote. All ATI did was re order some of the instructions in the shaders to "optimize" them. The optmized and the original shader programs were functionally evquivalent. Sort of what happens when a complier optimizes code. The same can't be said for what Nvidia did.
I've worked in the PC industry more years than I care to think about. All graphic card vendors tweak their drivers and bios to make their cards look better. If people didn't put so much emphisis on benchmarks for buying decisions then there would not be much reason to tweak things but the reality of the world is they do.
On a side note, me and my team many, many years ago designed, what was at the time, one of the fastest chip sets for the blinding new 12 Mhz 386 PC. We had discovered that the Norton SI program that everyone was using to benchmark PC's based most of it's performance on a small 64 Byte (yes, that is not a typo 64 BYTE) loop. We had considered putting a 64 byte cache in our memory controller chip but our ethos won at the end of the day as cleary what we would have done would have been discovered and the benchmark would have been rewritten. Had we done it however, for our 15 mins of fame our benchmarks would have been something crazy like 10x or 100x better than anything out there.
"TV, a medium as it is neither rare nor well done." Ernie Kovacs
3dMark isn't a standard. It's a business, who makes money by charging hardware developers LOTS of money to be included in their "BETA" program. In real life(TM), manufacturer-specific optimizations matter. Many games will look better and run faster if they use vendor-specific OpenGL extensions, for instance. For a gamer looking to buy the fastest card to run his favorite game, he should look for benchmarks on that game. FutureMark is trying to make a business by predicting behavior of games that aren't out. Well, either the game you want to play is out or it isn't. If it's out, buy your card based on benchmarks for it. If it's not, wait until it's out before you spend your money. There is no guarantee that 3dMark is a good predictor of DirectX 9 performance.
When Quake III runs at 300 FPS on my system under my 9700 Pro with 4x AA, I could care less about 3DMark and what ATI or Nvidia tweak. If the games run smooth and they look good, then go with it. Truth is, the ATI looks better than the Nvidia card under QIII, WCII, JKII, and pretty much everything else I've been playing.
The issue with low FPS is a game problem 9 out of 10 times. The faster the video card, the less the game development houses work to streamline and improve their framerate.
Open Source benchmarks are a bad idea because Closed Source drivers can still be used which may or may not contain these "cheats".
Better to have open source drivers so we can inspect the driver for cheating/optimisations.
Infact, open source them all if the hard numbers are that important!
All this does is make 3DMARK look worthless as a benchmarking app. All it has now is some value as a pretty looping demo or stress testing application. I run it to make sure the card works and the drivers are installed properly (as in runs all tests) and thats it. The little number it spits up at the end is worthless.
I dont even bother with 3DMark scores when I read reviews, I skip straight to the tested games and get a look at the FPS at various levels of detail.
Then it's easy to realize that card A gives 201 FPS, card be gives 199 FPS, and the answer is: buy whichever is cheaper.
This gives me much more useful information that relates to what I want the card for - playing games.
I don't need no instructions to know how to rock!!!!
If it was a generic optimization (and probably should have been), there'd be no issue.
ATI recognized the 3dmark executable and special cased for it. Which is misleading and wrong. The performance is enhanced for 3DMark and 3DMark alone.
I don't need no instructions to know how to rock!!!!
This happens so often in grade school I'm surprised the computer industry hasn't caught on to it yet. If you give students a copy of the exam the night before the exam, the only material they are going to bother to study the question-answer pairs on that exam, and may just remember what the answer to #6 is rather than even try to understand the question.
In order for a driver benchmark to be useful at all, it needs to be kept absolutely secret from the chip manufacturers before the test, and then once it is used and revealed that benchmark needs to be retired, because the next generation of testing should be designed to concentrate on the new features that the graphic card developers are expected to put in their next generation of cards that will be used in the next generation of games.
In short, the best benchmark will always be based on "that sure-to-hit game that's just about to come out."
Rewriting shaders behind an application's back in a way that changes the output under non-controlled circumstances is absolutely, positively wrong and indefensible.
Rewriting a shader so that it does exactly the same thing, but in a more efficient way, is generally acceptable compiler optimization, but there is a range of defensibility from completely generic instruction scheduling that helps almost everyone, to exact shader comparisons that only help one specific application. Full shader comparisons are morally grungy, but not deeply evil.
The significant issue that clouds current ATI / Nvidia comparisons is fragment shader precision. Nvidia can work at 12 bit integer, 16 bit float, and 32 bit float. ATI works only at 24 bit float. There isn't actually a mode where they can be exactly compared. DX9 and ARB_fragment_program assume 32 bit float operation, and ATI just converts everything to 24 bit. For just about any given set of operations, the Nvidia card operating at 16 bit float will be faster than the ATI, while the Nvidia operating at 32 bit float will be slower. When DOOM runs the NV30 specific fragment shader, it is faster than the ATI, while if they both run the ARB2 shader, the ATI is faster.
When the output goes to a normal 32 bit framebuffer, as all current tests do, it is possible for Nvidia to analyze data flow from textures, constants, and attributes, and change many 32 bit operations to 16 or even 12 bit operations with absolutely no loss of quality or functionality. This is completely acceptable, and will benefit all applications, but will almost certainly induce hard to find bugs in the shader compiler. You can really go overboard with this -- if you wanted every last possible precision savings, you would need to examine texture dimensions and track vertex buffer data ranges for each shader binding. That would be a really poor architectural decision, but benchmark pressure pushes vendors to such lengths if they avoid outright cheating. If really aggressive compiler optimizations are implemented, I hope they include a hint or pragma for "debug mode" that skips all the optimizations.
John Carmack