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Exactly How Does a CPU Bottleneck a GPU? - Page 6

post #51 of 56
games depend on the cpu and gpu. if ur gpu is fast and ur cpu is slow/old you wont get a really good performance because the game needs more speed from the cpu. in games, cpus have a different role than gpus thats y it will hold ur graphics card behind in terms of performance.
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post #52 of 56
why are we even discussing this? It's pretty obvious that if your cpu is slow then the whole experience would be slow no matter of other components...
    
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post #53 of 56
Know it is kind of a newbish question but will I experience a lot of bottlenecking pairing a Core2 Quad Q9300 (2.5 GHz) with a Palit 560 Ti Sonic (1GB)?

Hope this is not a too stupid question to answer..

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post #54 of 56
Quote:
Originally Posted by AtheistDane;14151920 
Know it is kind of a newbish question but will I experience a lot of bottlenecking pairing a Core2 Quad Q9300 (2.5 GHz) with a Palit 560 Ti Sonic (1GB)?

Hope this is not a too stupid question to answer..

Regards,
AtheistDane


It depends on what test you run (i.e. what game/bench), and what settings you run that test at (res, aa, other IQ settings). It also depends on what your own personal definition of 'a bottleneck' is.

I personally stick by the literal definition of the term ... if I get 100fps on game X at 1920x1200 on Very High, with 4xAA, with my CPU at 3.0GHz, then I OC my proc up to 4.0GHz, and end up getting 105fps on game X at the exact same settings ... then I had a CPU bottleneck, in game X, at those settings, at 3.0GHz. And I might still at 4.0GHz, I can't really know unless I OC it even more and compare scores.

Now, that is using the actual definition of the term. Yes, it's a very slight CPU BN, and it's an irrelevant one, and it ONLY applies to that game, at those settings ... but it technically still IS one.

By MY definition, yes, there will definitely be some bottlenecking on certain games/benches with the setup you propose. On rare occasions, the BN might actually reach the status of 'a lot'.

So ... what is YOUR definition of the term, and what games do you generally play, and at what resolution, and what IQ settings?

Basically the harder you make the game to run graphically, by increasing resolution and image quality, the lower the FPS will be, due to your GPU having to work harder. This, in turn, lowers the probability that your CPU will be the 'limiting factor' to performance, because less FPS = less data that the CPU has to process over a given period of time.
    
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post #55 of 56
I'm going to buy a new gfx-card, but i don't know wich one to choose yet. It's either Ati 5770 or 6850 (green edition without the extra power-connector). Since i have a Shuttle im going to buy a single-slot type. My CPU is Intel Dual Core E5700 3.0 GHz. Will my CPU bottleneck both the 6850? Should i go for the 5770 instead?

Thanks in advance.
post #56 of 56
I bottleneck my processor at 4ghz, when I play the new Deus Ex: HR maxed out... Both my GPU's usage reach up to 82% and thats it.
When I play more stressful games like Crysis or 3dMark, It will jump to 99%...

Like stated above, it all depends on the application, and which it will utilize more, and keeping up with the latest games; you will NOT want a Pentium 4 with a Fermi GPU...
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