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CPU bottlenecking my 2x 4870's? - Page 2

post #11 of 20
Quote:
Originally Posted by nategr8ns View Post
No, it is not.
First of all, "bottlenecking" is not about one hardware component holding back the others, its about the hardware holding up the software that the user is trying to use.
Second, if the second card added no benefits, are you sure the game wasn't running at the best it could, software wise? If things actually feel slow, then yes, I would say your processor is too slow. My guess is that a single graphics card was already more than enough for your games though.

Just for some perspective, my Opteron 170 (dual core) at 2.5GHz can play everything just fine, and it was manufactured in the early 2000s. For games, the graphics card is really what matters. Games like GTA4 run terribly, but that is because that specific game requires a lot of processor power. Despite me having a GTX 285, the processor is the weak link for that specific game.

So a better question would be, do you need a better processor? The answer is probably no, but if you want to squeeze every ounce of eye-candy and performance into your game playing, go ahead and upgrade.


Please explain to me how a PENTIUM DUAL CORE is not bottlenecking two cards in CrossfireX that rival a GTX 295.
     
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post #12 of 20
Thread Starter 
Quote:
Originally Posted by BWG View Post
Are you overclocking your e5300?

I think it could be part of the problem, but since you need permission from the other half, tell her we said it is your cpu, monitor, ram, hard drive, and the lack of a ZR1 Vette.
I like the way you think, the wife does not...

Yah I've got my e5200 running @ 3.5ghz. I was considering upgrading the CPU but a e8400 was $180 and a q9550 is $280. The extra 4870 was only $100 and I didn't want to buy a new CPU without upgrading to an i7.
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post #13 of 20
At that overclock, there probably is a measure of bottlenecking but not much.
     
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post #14 of 20
Thread Starter 
Quote:
Originally Posted by Imglidinhere View Post
At that overclock, there probably is a measure of bottlenecking but not much.
Good to know. Just just to verify what I was told, running at a higher resolution will push more load onto my GPU and off my CPU giving me better overall performance?
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post #15 of 20
what is the gpu usage in game? if both are running at 100% then your cpu is fine, any less then you have a cpu bottle neck. It will probably change from game to game.

Edit: test with vsync off.
Edited by pyra - 3/1/11 at 12:57pm
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post #16 of 20
Thread Starter 
cool I'll check when I get home. I might try draging the PC into the living room at test the difference between my 42" TV and the 19" monitor.
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post #17 of 20
Quote:
Originally Posted by idleivey View Post
cool I'll check when I get home. I might try draging the PC into the living room at test the difference between my 42" TV and the 19" monitor.
Is the TV 1080p? if so it should give a good idea of any potential bottle neck.

Also, I know the 4*** series don't scale brilliantly in crossfire (of course this also depends on the game) but I am not sure if this will show as a drop in GPU usage or just not as much FPS... maybe someone else knows???
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post #18 of 20
Thread Starter 
Yah its 1080p

...I guess I don't understand why my FPS would be better @ 1920x1080 then under 1440x900. It would make sense that whatever my current FPS is I would be able to maintain that performance at a higher resolution. What I don't understand how increasing my resolution will increase my performance from its current state.
Edited by idleivey - 3/1/11 at 1:10pm
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post #19 of 20
Quote:
Originally Posted by idleivey View Post
Yah its 1080p

...I guess I don't understand why my FPS would be better @ 1920x1080 then under 1440x900. It would make sense that whatever my current FPS is I would be able to maintain that performance at a higher resolution. What I don't understand how increasing my resolution will increase my performance from its current state.
I don't think it will be higher, I do disagree with who ever said this.

If you go from a low res to a high res and your FPS stays the same you are bottlenecked by you cpu at both resolutions but one will look better. the higher res can not have a higher FPS.... I think
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post #20 of 20
Thread Starter 
Found some good benchmarks on toms that illustrate the performance gains of crossfire under different resolutions. http://www.tomshardware.com/reviews/...ss,2095-7.html
Edited by idleivey - 3/1/11 at 1:31pm
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