Half-Life 2 Performance Benchmark Preview
by Anand Lal Shimpi on September 12, 2003 12:34 AM EST- Posted in
- GPUs
By now you've heard that our Half-Life 2 benchmarking time took place at an ATI event called "Shader Day." The point of Shader Day was to educate the press about shaders, their importance and give a little insight into how ATI's R3x0 architecture is optimized for the type of shader performance necessary for DirectX 9 applications. Granted, there's a huge marketing push from ATI, despite efforts to tone down the usual marketing that is present at these sorts of events.
One of the presenters at Shader Day was Gabe Newell of Valve, and it was in Gabe's presentation that the information we published here yesterday. According to Gabe, during the development of Half-Life 2, the development team encountered some very unusual performance numbers. Taken directly from Gabe's slide in the presentation, here's the performance they saw initially:
Taken from Valve Presentation
As you can guess, the folks at Valve were quite shocked. With NVIDIA's fastest offering unable to outperform a Radeon 9600 Pro (the Pro suffix was omitted from Gabe's chart), something was wrong, given that in any other game, the GeForce FX 5900 Ultra would be much closer to the Radeon 9800 Pro in performance.
Working closely with NVIDIA (according to Gabe), Valve ended up developing a special codepath for NVIDIA's NV3x architecture that made some tradeoffs in order to improve performance on NVIDIA's FX cards. The tradeoffs, as explained by Gabe, were mainly in using 16-bit precision instead of 32-bit precision for certain floats and defaulting to Pixel Shader 1.4 (DX8.1) shaders instead of newer Pixel Shader 2.0 (DX9) shaders in certain cases. Valve refers to this new NV3x code path as a "mixed mode" of operation, as it is a mixture of full precision (32-bit) and partial precision (16-bit) floats as well as pixel shader 2.0 and 1.4 shader code. There's clearly a visual tradeoff made here, which we will get to shortly, but the tradeoff was necessary in order to improve performance.
The resulting performance that the Valve team saw was as follows:
Taken from Valve Presentation
We had to recap the issues here for those who haven't been keeping up with the situation as it unfolded over the past 24 hours, but now that you've seen what Valve has shown us, it's time to dig a bit deeper and answer some very important questions (and of course, get to our own benchmarks under Half-Life 2).
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Anonymous User - Friday, September 12, 2003 - link
I perviously posted this in a wrong place so let me just shamelessly repost in here:Let me just get my little disclaimer out, before I dive into being a devil's advocate - I own both 9800pro and fx5900nu and am not biased to neither, ATi or nVidia.
With that being said, let me take a shot at what Anand opted not to speculate about ant that is the question of ATi/Valve colaboration and their present and future relationship.
First of all, FX's architecture is obviously inferior to R3x0 in terms of native DX9 and tha is not going to be my focus. I would rather debate a little about the business/finacial side of ATi/Valve relationship. That's the area of my expertise and looking at this situation from afinacial angle might add another twist to this.
What got my attention are Gabe Newell presentations slides that have omitted small but significant things like "pro" behind r9600 and his statement of "optimiztions going too far" without actually going into specifics, other than new detonators don't render fog. Those are small but significant details that add a little oil on a very hot issue of "cheating" in regards to nVidia's "optimizations". But I sopke of inancial side of things, so let me get back to it. After clearly stating how superior ATi's harware is to FX, stating how much effort they have invested to make the game work on FX (which is absolutely commendable) I can not help but notice that all this perfectly leads into the next great thing. A new line of ATi cards will be bundeled with ATi cards (or vice versa), and ATi is just getting ready to offer a value DX9 line. Remember how it was the only area that they have not covered and nVidia was selling truckloads of FX5200 in the meantime. After they have demonstrated how poorly FX flagship performs, let alone the value parts, is't it a perfect lead into selling shiploads of those bundeled cards(games). Add to that Gabe's shooting down of any optimization efforts on nVidia's part (simply insinuate on "chaets") and things are slowly moving in the right direction. And to top it all off, Valve expilcitley said that future additions will not be done for DX8 or so called mixed class but exclusively DX9. What is Joe consumer to do than? The only logical thing - get him/herself one of those bundles.
That concludes my observations on this angle of this newly emerged attraction and I see only good things on the horizon for ATi stockholders.
Feel free to debate, disagree and criticize, but keep in mind that I am not defending or bashing anybody, just offering my opinion on the part I considered equally as interesting as hardware performance is.
Anonymous User - Friday, September 12, 2003 - link
Wow...I buy a new video card every 3 years or so..my last one was a GF2PRO....hehe...I'm so glad to have a 9800PRO right now.Snif..I'm proud to be Canadian ;-)
Anonymous User - Friday, September 12, 2003 - link
How come the 9600 pros hardly loses any performance going from 1024 to 1280? Shouldn't it be affected by only having 4 pipelines?Anonymous User - Friday, September 12, 2003 - link
MUHAHAHA!!! Go the 9600pros, i'd like to bitch slap my friends for telling me the 9600's will not run half-life 2. I guess i can now purchase an All-In-Wonder 9600pro.Anonymous User - Friday, September 12, 2003 - link
Man, I burst into a coughing/laughing spree when I saw an add using nVidia's "The way it's meant to be played" slogan. Funny thing is, I first noticed the add on the page titled "What's Wrong with Nvidia?"Anonymous User - Friday, September 12, 2003 - link
booyah, i hope my ti4200 can hold me over at 800x600 until i can switch to ATI! big up canadaAnonymous User - Friday, September 12, 2003 - link
You can bet your house nvidia's 50 drivers will get closer performance, but they're STILL thoroughly bitchslapped... Ppl will be buying R9x00's by the ton. Nvidia better watch out, or they'll go down like, whatwassitsname, 3dfx ?dvinnen - Friday, September 12, 2003 - link
Hehe, I concer. Seeing a 9500on there would of been nice. But I really want to see is some AF turned on. I can live with no AA (ok, 2x AA) but I'll be damn if AF isn't going to be on.Anonymous User - Friday, September 12, 2003 - link
Anand, you guys rock. It's because of your in depth reviews that I purchased the Radeon 9500 Pro. I noticed the oddity mentioned of the small performance gap between the 9700 Pro and the 9600 Pro at 1280x1024. I would really like to see how the 9500 Pro is affected by this (and all the other benchmarks). If you have a chance, could you run a comparison between the 9500 Pro and the 9600 Pro (I guess what I really want to know if my 9500 Pro is better than a 9600 Pro for this game).Arigato,
The Internal
Pete - Friday, September 12, 2003 - link
(Whoops, that was me above (lucky #13)--entered the wrong p/w.)