Half Life 2 GPU Roundup Part 2 - Mainstream DX8/DX9 Battle
by Anand Lal Shimpi on November 19, 2004 6:35 PM EST- Posted in
- GPUs
DirectX 9 Performance Impact
Now that you've seen what improvements Half Life 2's DX9 path can give you, let's take a look at the price to pay for some of those impressive visual effects. In order to measure the impact of the DX9 path we did the following: ran benchmarks using both the DX8 and DX9 paths, then took the percentage decrease in performance seen by going to DX9. We then averaged the percentage decrease across all five of our custom Half Life 2 benchmarks, per card, per resolution. We will look at actual performance numbers shortly, but this is just to give you an idea of what's to come:
At 800 x 600 the game is mostly CPU bound on cards like the Radeon 9600XT, thus the performance drom from DX8 to DX9 is quite small. Even on cards like the X300 and the Radeon 9550 the performance hit isn't too bad at less than 20%. But here's the kicker, the GeForce 5900XT sees almost a 60% drop in performance by going to DX9 mode. This type of a performance drop should be relatively consistent across the entire NV3x line (e.g. FX 5900 Ultra, FX 5600, etc...).
At 1024 x 768 now all of the GPUs are in double digit performance losses, but even the GeForce 6200 with its 25% performance hit is nothing compared to the 5900XT which incurrs a 65% performance hit when going to DX9.
At 1280 x 1024 things get just a little worse, but you should get the picture by now - the GeForce FX line does not perform well as a DX9 part under Half Life 2.
You will undoubtedly see these statistics reflected in the actual performance of the 5900XT in the coming pages, but basically if you are a NV3x GPU owner you will want to run Half Life 2 in DX8 mode and not DX9 mode.
Now let's take a look at how the rest of the GPUs perform in both DX8 and DX9 modes. For these tests we used the exact same drivers and platforms as our first article, just with different video cards so the numbers are comparable.
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klah - Saturday, November 20, 2004 - link
"cant wait for CPU benches"Check out these:
http://www.firingsquad.com/hardware/half_life_2_cp...
KevinCQU - Saturday, November 20, 2004 - link
#17, I'm running the game on a regular GF3, AXP2500+ @2.2 and 512 ram. It runs smoothly at directx8 settings, I turned down the water quality though, havent tried turning it up yet, been busy playing the game ;) I'm impressed though....its definitely playable at 1024 and it looks pretty nice too-Kevin
ksherman - Friday, November 19, 2004 - link
#17, im probably gonna try and run the game (GF2 TI200, but OCed to Ti400 speeds ;), so ill let you know if itll work...ksherman - Friday, November 19, 2004 - link
dumbish question--> i i wanna play in DX7 or 8 mode, do i need to install different driers, or do i just use the ingmae settings? I dont actually own the game yet, so thats why i ask...kmmatney - Friday, November 19, 2004 - link
I can't believe how much better DirectX looks compared to OpenGL. Seems like Id made the wrong choice...GonzoDaGr8 - Friday, November 19, 2004 - link
Aaargh..Has anyone ran this game yet on a Geforce3(regular/Ti200/Ti500) based card yet? I'm curious as I have a Ti200 and could run this is DX8 mode..skiboysteve - Friday, November 19, 2004 - link
#13 is exactly rightits not all OpenGL vs DX or nvidia optimization to ati optimization.
look back at anands article about the graphics pipeline on each of these cards. Doom3 was extremly texture intensive, doing allot of lookup to tables instead of doing the math.
nv30 and nv40 are very good at doing texture look ups, and only the nv40 is good at the math. nv30 had a very non math friendly pipeline.
the r300-r400 were better at math.
its all in the articles on this very website.
bupkus - Friday, November 19, 2004 - link
I have a Ti4200 w/ 64MB ram and I changed from 1024x768 to 800x600 to fix some occasional stutter problems; it didn't help.Which res should I probably be able to run in. I have a 2500+ Barton OC'd to 2.2GHz with 2x256 OCZ PC3500 EL.
Just for fun, I went to 1280x1024 for my LCD just to see how it would look (without movement) and it was very nice.
skunkbuster - Friday, November 19, 2004 - link
also, nvidia is known to be better at openGl games and weaker in games that use dx.the same as ati is known to be better at dx games, and weaker in openGl games.
doom3= open gl
Falloutboy - Friday, November 19, 2004 - link
#10 its because Doom 3 was very texture intensive based, which the 5xxx series of nvidia exceled at and HL2 is a very shader intensive engine wit hless emphasis on texutures, and as we all know by now the 5xxx series sucked in DX9 shaders