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BigBadBob

UT2Kx Engine CPU Heavy?

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Does anybody have any idea why the UT2k4 Engine is so CPU heavy compared to other games which seem to be more GPU dependent. Is this necessary for a game feature or down to some poor programming on epic's part? thanks.

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I would hazard a guess that it is a design feature, and not a bad mistake on Epic's part. Simply because, that engine has been in development, like, forever, and during that time, it would have been kind of hard for them to miss a problem that big, if they actually considered it a problem.

Although I could be wrong, as I'm just guessing there.

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I fail to see how this is a design "problem" or a flaw in any way. Nowadays, the video card is often the most expensive part in a computer and so not everyone is willing to upgrade it every three months. A new AthlonXP 3000+ will only cost you $150 whereas a new ATI X800 will cost you $450. A new CPU can also be easier to justify, since it will speed up everything to some extent, and not just games.

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Ok, well i really find UT2K4 for instance far too CPU bottlenecked, well that is i guess memory bandwidth. When im at ~3GHz (400FSB) (with a 9800 @ pro) im not satisfied with the way it performs, however if i overclock my CPU FSB wise, to say 460FSB whilst even downclocking the gfx card, there is a vast increase in performance.
A CPU performance of this caliber is not required by other similar-generation FPS games and so what I'm asking really is...does anyone know what features in the UT2k4 engine result in this performance characteristic?

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CPU is the bottleneck in all the engines out there, its just a question of: to what extent?

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The sound driver (at least under Mac OS X) appears to drag down the framerate more than anything else. Try turning it off; I'd love to see if sound is stupidly handled entirely on the CPU under NT or Linux.

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Ok so if we look at AI as a cause ... in a MP game (I'm talking of online play) there is no AI needed in the conventional bot sense so it can't be that.

Quote:
CPU is the bottleneck in all the engines out there, its just a question of: to what extent?
Exactly my point but the question then is why is the CPU a bottleneck in UT2k4 to an extent more than other games?

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I'll agree with MadMan on that one. Of course, now you've got me curious. I get a steady FPS of much higher than 30 (haven't actually measured in a while, but it's definitely smooth motion) with the graphics turned all the way up on my dual Xeon 2.4GHz box with a Radeon 9700(non-pro). Here's a way to test our hypothesis: do you have the same problem while playing with only human players or while playing with AI on a separate server?

{Edit: so if it's not the AI, then what happens when you turn the graphics all the way down?)

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Guest Anonymous Poster
I'd say it's cpu bottle-necked cause pretty much the whole thing runs off Unreal*SCRIPT*.

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