3570k can't handle two 7950's

Djentleman · Jun 19, 2013

I've been having low gpu usage problems for awhile. And while searching the web i found similar problems with the 3570k CPU.

Here's the cpu usage on a 64 man server with crossfire enabled:

And to make sure that it wasn't me i did 3dmark 11 tests and the cpu passed with flying colors.

Here's all the processes i have running when bf3 is running:

I don't know if its my PC, but this is my experience with the 3570k and powering 2 high end GPU's.

aredflyingbird · Jun 19, 2013

Djentleman :

Make sure Vsync is disabled from in-game settings. Are you running a 120hz monitor?

Djentleman · Jun 19, 2013

aredflyingbird :

Djentleman :

Make sure Vsync is disabled from in-game settings. Are you running a 120hz monitor?

Vsync is disabled, and i have a 60hz 1080p monitor.

bystander · Jun 19, 2013

Some games are GPU bound, others are CPU bound. Multiplayer games tend to be more CPU bound. That is how gaming is. The good news is you still should be around 50-60 FPS on minimums, which is not bad.

aredflyingbird · Jun 19, 2013

A 60hz monitor will only display 60 frames, having more than 60 fps will be discarded.(In case you didn't know) Anyway, are you using the latest drivers and CAP's? and try running a benchmark program to make sure their under load.

Djentleman · Jun 19, 2013

aredflyingbird :

I knew that.
And of course i have caps.
I did heaven and 3dmark which showed that they were healthy. Crysis also runs pretty good.

Djentleman · Jun 19, 2013

bystander :

Yeah, but that's what you should be getting with a single 7950 lol.

Deleted member 217926 · Jun 19, 2013

As said above the multiplayer maps on BF3 are largely CPU bound. Overclocking the CPU will of course increase performance. In the single player campaign your dual cards will be more of the determining factor.

Djentleman · Jun 19, 2013

A lot of people didn't believe me on these forums that it was a bottleneck though. I just thought i would post my proof.
At least in my case.

Deleted member 217926 · Jun 19, 2013

Oh yeah BF3 multiplayer will eat the fastest CPU you can throw at it! The more cores the better.

ahmedomran · Jun 19, 2013

aredflyingbird :

A 60hz monitor will only display 60 frames ONLY if the Vsync was ON, if it was off you will get more than 60 fps with no issues.

aredflyingbird · Jun 19, 2013

ahmedomran :

A 60hz monitor refreshes the screen 60 times per second. Therefore, a 60hz monitor is only capable of outputting 60fps. If you go over 60fps, you will see screen tearing, which happens when your videocard is rendering frames faster than your monitor can display them.

Djentleman · Jun 19, 2013

ahmedomran :

That's not the point of this whole thread. My 60hz monitor doesn't hold anything back, because i don't have vsync on.
Didn't you read the thread?

bystander · Jun 19, 2013

Djentleman :

Like I said, you are CPU bound. That is what happens with CPU bound games and it is far more common with Crossfire or SLI. The other benefit to this, is your Crossfire microstutter issue is likely fixed during those times.

bystander · Jun 19, 2013

bishopi5 :

No CPU can claim that with 7950 crossfires at least. BF3 isn't even the most CPU demanding game out there. There are a lot of games which won't let any GPU setup go faster than 50 FPS in the more demanding areas, no matter if you had 4 Titan's or not.

It is a great CPU, and it won't be the weak link in very many games, but some games put a lot of duties on the CPU. You just have to live with it.

Djentleman · Jun 19, 2013

bishopi5 :

bystander :

This is exactly what i've been hearing this whole time.
You're right for the most part, but when it comes to games like battlefield, where there is a lot going on a 64 man server, it just seems that it can't keep up with crossfire nor SLI. It didn't do this with my 7850's, but they were weaker cards.

I've seen this on several rigs with crossfire and sli with the 3570k. The only thing you can do, is up your resolution or add a crap ton of AA.

So bystander hit it on the head.

@bystander Does your cpu bottleneck with your 680's in bf3? What resolution do you play at?

bystander · Jun 19, 2013

I don't play BF3, so I can't tell you. However, I do run into bottlenecks in other games. Tomb Raider, for example, bottlenecks in a few areas. It bottlenecks on all CPU's by the benchmarks I've seen and unlike many games, in 3D Vision, I suffer a double bottleneck, as it seems to have to do a lot of CPU processing for each eye's frame, while most games tend to share the CPU processing between eyes.

Djentleman · Jun 19, 2013

bystander :

Ugh, that must be weird, so that means for one eye it's slower?
I couldn't do that.

bystander · Jun 19, 2013

Djentleman :

No, all frames require a left and right eye to be generated and they will not be moved to the front buffers to be displayed until both are ready. What I'm saying is in most games with a CPU bottleneck, I suffer no more off a bottleneck in 3D than in 2D, but in Tomb Raider, I end up with almost half FPS of 2D.

3570k can't handle two 7950's

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