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Help!: Video Card being bottlenecked by CPU?

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September 6, 2011 3:40:36 AM

Dear Tom's Hardware Community,

- I play on a single 1080p monitor.
- My processor is: AMD Phenom II X4 955 3.2 GHz, OCed to 3.7 GHz.
- My graphics card is: GTX 580, OCed by 15%.

If you would all be so kind as to answer two questions of mine, I would greatly appreciate it!

1. Is my CPU currently bottle-necking my GTX 580?
2. If I upgrade in the future to GTX 580 SLI (as well as the power supply), will my CPU be bottle-necking my GTX 580 SLI?

Thanks for all the help,

Jeff
a c 138 à CPUs
September 6, 2011 4:12:56 AM

jtype01 said:
Dear Tom's Hardware Community,

- I play on a single 1080p monitor.
- My processor is: AMD Phenom II X4 955 3.2 GHz, OCed to 3.7 GHz.
- My graphics card is: GTX 580, OCed by 15%.

If you would all be so kind as to answer two questions of mine, I would greatly appreciate it!

1. Is my CPU currently bottle-necking my GTX 580?
2. If I upgrade in the future to GTX 580 SLI (as well as the power supply), will my CPU be bottle-necking my GTX 580 SLI?

Thanks for all the help,

Jeff


1. No bottleneck
2. yep bottleneck with speed 955BE 3.7ghz ..maybe need OC to 4.5Ghz :D 

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a c 471 à CPUs
September 6, 2011 4:17:07 AM

It should be fine in both cases. Well, maybe a slight bottleneck for SLI, but nothing really to worry about.

The following link compares your PII X4 955 to a PII X4 980 BE (3.7GHz).
http://www.anandtech.com/bench/Product/88?vs=362

Here's a comparison of the PII X4 980 BE to an Intel Core i5-2500K.
http://www.anandtech.com/bench/Product/362?vs=288
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September 6, 2011 4:24:26 AM

jaguarskx said:
It should be fine in both cases. Well, maybe a slight bottleneck for SLI, but nothing really to worry about.

The following link compares your PII X4 955 to a PII X4 980 BE (3.7GHz).
http://www.anandtech.com/bench/Product/88?vs=362

Here's a comparison of the PII X4 980 BE to an Intel Core i5-2500K.
http://www.anandtech.com/bench/Product/362?vs=288


Thanks for your very informative response, I really appreciate it!

Just curious, hypothetically, if I swapped out a PII x4 980 BE (3.7 GHz) for an Intel Core i5-2500k, with the GTX 580, how much of a performance improvement will there be?

Thanks!
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September 6, 2011 4:25:06 AM

henydiah said:
1. No bottleneck
2. yep bottleneck with speed 955BE 3.7ghz ..maybe need OC to 4.5Ghz :D 


Thanks, but if I do a 4.5 GHz OC, I think it'll blow up loll
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a b à CPUs
September 6, 2011 4:34:31 AM

I would expect better from the addicts in the community. Firstly, we don't have enough information to accurately answer the question. What games do you play? I have a very similar setup, X4 965 @ 3.8-4.1GHz and 2x GTX 460 in SLI, running on native 1080p, and I'm heavily CPU bottlenecked in many of the games I own. The cold, hard fact of the matter is that you could be running your CPU on LN2 @6GHz and still be CPU bottlenecked against a 580 in some situations (I know, I've tried it).

But if you tell us what games you play, we can make recommendations as to how to optimize your play experience :)  And don't get me wrong, the bottleneck will rest squarely on the 580 in many situations, where it should be:) 
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a c 471 à CPUs
September 6, 2011 4:39:31 AM

jtype01 said:

Just curious, hypothetically, if I swapped out a PII x4 980 BE (3.7 GHz) for an Intel Core i5-2500k, with the GTX 580, how much of a performance improvement will there be?



Difficult to say. The higher the resolution the more the performance depends on the graphics card. Of course if the game is more dependent on the CPU rather than the video card, then having a stronger CPU to begin with will give you better performance.

See following link for gaming performance with various CPUs at 1680 x 1050 resolution. Of course gaming at higher resolutions will result in lower frame rates. It's pretty easy to see that Intel's current CPUs and beat AMD's current CPUs.
http://www.xbitlabs.com/articles/cpu/display/core-i5-25...
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September 16, 2011 12:04:32 AM

Best answer selected by jtype01.
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