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How is the GPU usage in Battlefield 3 multiplayer for 2x 7970? - Page 9

post #81 of 112
It's the engine.

It happens to me too.

Though, I have a 7870 and a crappy PII 965.

But even on small maps with only 8 people my GPU usage drops to 60%.

I've overclocked my cpu to 4.0GHz and it does nothing, not even a bit.

I've downcloacked my gpu to the minimum, like 500/1000MHz (if I remember correctly) and nothing...


Either is the game, or the card plus the combination of an specific hardware that causes the problem.

You and I have the same RAM.
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post #82 of 112
Quote:
Originally Posted by ViTosS View Post

I noticed one thing, if I join any server that there is no one playing, only me, my usage keeps at 90~95% each one. But as the number of player starts to increase, the usage starts to down, I mean, if I join a 64 players map, full, I will get only 50~60% usage doh.gif
How can I check my CPU usage while in the game?

Because your CPU is handling all of the logical expressions associated with other players. Like calculating physics 64 times over.
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post #83 of 112
Just some ideas : a decent card needs at least 1-2 threads to drive it properly no? So, having two 670s youd need enough juice in 3-4 threads just to make it run properly. 3-4 threads = 2 cores, which leaves you with another 2 to run the game. Multiplayer uses a lot of CPU, and given that your CPU already devotes half of its juice to run the cards, it doesnt have an awful lot left to work out what 64 players are doing. Especially with a higher ping cos its working very hard to sync everything.
Note this is just theory, i might be wrong but does it not make sense? Im just thinking out loud.
Not sure abt your memory speed, but that could also have an impact.

I currently have a 3930k @4.5 ghz, and two 7970s running at 1200/1600. Before the new drivers usage would be at 99%. With the 12.11 drivers, usage is around 80%, but FPS is on average 15fps higher.
Thats a win for me,cos im still hitting 100plus fps, with my cards running cooler. If its due to driver optimisation,im happy with that.
Now, if my gpus were using 50% but my fps were below 60, then id be unhappy and be looking at a bottleneck somewhere, be it drivers or just the game itself.

I think its Nvidias new power efficiency stuff that only makes your cards run as hard as it needs to,instead of running as hard as it can. Run doom1 on any new card and see if it asks 99% from a SLI or CFX setup. Just because it can, does mean it will.


How about injecting some smaa or fxaa and see if it increases usage.



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post #84 of 112
For how many cores is BF optimized?
You have 8 cores total, each at around ~50% usage.

If BF is only optimized for 4 cores then Windows is managing and load balancing the tasks across the 8 cores, thus your actually usage is more like ~90%.

Maybe turn off HT and see if anything changes?
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post #85 of 112
I actually just received my second 670 4gb for 2560x1440, and I noticed my GPU usage at around 50-60%, and at ultra BF3 still manages top drop below 60. My 3570k is at 4.8... CMON NVIDEA!!
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post #86 of 112
Definitely not a CPU bottleneck dudes, his CPU is more than powerful enough even in a 64 player server.
http://www.youtube.com/watch?v=x-C7Svv5SJ4
This video shows two 680s in SLI at >80% usage in a 64 player game, with a 3570k and framerates above 100fps.
OP What PSU do you have, each 670 requires at least 30A on the +12v.

EDIT:nevermind, AX 850 should be fine
Edited by REDRIFLE - 11/6/12 at 9:33pm
post #87 of 112
So driver problem?
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post #88 of 112
Quote:
Originally Posted by ViTosS View Post

Here is a screenshot I took in 64 player server full, look the GPU usage and CPU usage:

Are you sure it is not:
post #89 of 112
-nvm- missread OP
Edited by Sisaroth - 11/7/12 at 2:38am
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post #90 of 112
Quote:
Originally Posted by Norlig View Post

Are you sure it is not:

You might have a point, 157fps and he's using just over 50% of his GPU power? That would indicate that running at 100% he would have the best part of 300fps..... GTX 670's can't run BF3 at 300fps at max settings....

Seems like it is the fan power..
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