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GPU bottleneck? 580 on an i5 - Page 2

post #11 of 18
Quote:
Originally Posted by jak View Post
But what about gaming at 1080p on a GTX580 on an i7 at 4ghz and a stock i5? Will there be any frame rate difference?
Doubt it. Most games don't even use more than 2-4 cores, so HT is out. Also, as he told you, as long as the game is not CPU dependant (Civ5, GTA4 comes to mind), you'd be getting some nice graphics.
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post #12 of 18
[QUOTE=jak;13666464]But what about gaming at 1080p on a GTX580 on an i7 at 4ghz and a stock i5? Will there be any frame rate difference?[/QUOTE

I would bet you anything with the exception of Civ 5 you will run every game above 60FPS. Now yes there will be some gain in OC'ing in specific environments that require more CPU power. But as I stated earlier, this would be a CPU dependent environment. Long story short. 1 580+and cpu will result in epic gaming (60fps+). Period. If anyone tells you otherwise, they are not informed.
post #13 of 18
Thread Starter 
Good stuff. But I was wondering why Civ5 is more cpu dependent than gpu dependent? Or rather, why are some games more cpu intensive than others? Are strategy games where you need an expansive view of the world typically more cpu intensive?
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post #14 of 18
Quote:
Originally Posted by jak View Post
Good stuff. But I was wondering why Civ5 is more cpu dependent than gpu dependent? Or rather, why are some games more cpu intensive than others? Are strategy games where you need an expansive view of the world typically more cpu intensive?
That is completely up to the developers and the engine of which they develop. Furthermore, the issue gets significantly more complicated when you are discussing multi-GPU setups. But, as a rule of thumb, RTS games have tremendous amounts of emphasis on AI, timed events, and other such things. This means there is more to process beyond the usual graphics. An exception being GTA: IV because it has many instanced AIs, generating map areas, and high end physics.
post #15 of 18
The info on this thread is good

Yes, on the more cpu-dependent games/benches (3dMark06, Crysis, GTAIV SC2, Civ5, BFBC2, COD:BO all come to mind), you'd definitely see some FPS improvement if you OC'd your chip, depending of course on the settings you run ... obviously the higher the IQ settings, the lower the FPS will be, and hence the less likely the CPU will impact performance, as it's not being asked to do as many calculations per unit of time.

Most other games though even at stock your CPU is going to support a pretty high FPS w/o becoming a limiting factor.

I7's aren't real hard to OC though, esp. if you aren't pushing for something really high. THere's guides to OC'ing them all over the place. And hitting 3.6GHz is a cake-walk, and would definitely help the more CPU-dependent games.

Edit: Yes, strategy games often are fairly CPU-dependent because they tend to have a lot of calculations going on ... basically anything going on in the game that's not explicitly the rendering of graphics, is the work of the CPU ... calculating AI, physics, and all the other important 'statistics' needed for the game to operate.

Any game that has a lot of 'units' on the screen (and many different in-game things could be considered 'units' in this context) that need to be managed with some degree of apparent 'intelligence', tends to require a lot of cpu "work" per frame rendered by the GPU.

The CPU can also be involved in certain calculations that are directly 'graphically' related as well, such as geometry calculations for the scene being rendered ... although over time GPU's have been taking on more and more of the 'math' that's directly involved in producing the graphical image, there's still some calc's that the GPU can't do, that end up getting farmed out to the CPU.
Edited by brettjv - 5/28/11 at 10:27am
    
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post #16 of 18
Quote:
Originally Posted by Silaz View Post
An exception being GTA: IV because it has many instanced AIs, generating map areas, and high end physics.
And exceptionally bad coding. Check out Mafia 2 after playing GTA 4 and you'll see a huge difference. Not only it looks better, it runs twice as fast.
post #17 of 18
I am bottlenecked...you will not be too bad

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post #18 of 18
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Originally Posted by jak View Post
I've just had horrible experiences with overclocking in past systems (computer not booting up, serious instability, etc). I'd rather just not deal with it. Also, I don't really care about benchmark scores; I just want my games to run really well.
That's why you test for stability and clear CMOS when your PC won't boot My question is: how were you not jipped into buying some overpriced Alienware? you seem like the traget audience.
 
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