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Low GPU usage in Battlefield3 with Tri-fire 7970s and a 2500k @ 4.7ghz - Page 2

post #11 of 64
Did you notice going from 120 to 90 fps? Just kidding. It's your rig, your money and you can spend it the way you want to smile.gif
Although, CF doesn't always run properly so, tri-fire... yeah, it's kind of asking for trouble.
Quote:
Originally Posted by Stu-Crossfire View Post

If like me he is benching a lot, then perhaps. Yes.

How much can someone benchmark until he/she grows tired of it ? tongue.gif

/end rant

I suspect that your CPU is not powerful enough to keep up with your GPUs. (Oh, the irony rolleyes.gif ) 3960X !
post #12 of 64
Thread Starter 
Quote:
Originally Posted by Xenthos View Post

Did you notice going from 120 to 90 fps? Just kidding. It's your rig, your money and you can spend it the way you want to smile.gif
Although, CF doesn't always run properly so, tri-fire... yeah, it's kind of asking for trouble.
How much can someone benchmark until he/she grows tired of it ? tongue.gif
/end rant
I suspect that your CPU is not powerful enough to keep up with your GPUs. (Oh, the irony rolleyes.gif ) 3960X !

Well, the reason I went with Tri-fire with my 7970s is that Tri-fire and Quadfire with my 6970s worked flawlessly and was a great experience, that I thought could be repeated with the new architecture, but unfortunately with all of the changes to the 7970, the drivers are basically starting from scratch, so unfortunately those of us that jumped in early are going to have to wait for them to catch back up to the 69xx series' drivers.

As far as noticing the change from 3 6970s to 3 7970s, it was more like going from a 60fps minimum to a 120fps minimum if it were working correctly. Even with just 2 7970s at a very mild overclock, I never see minimums under 80fps in BF3. The thing is, I purchased this hardware to serve a purpose. That purpose being to make full use of my 120hz monitor in the game(s) that I love, including BF3. With that said, a 120 fps minimum and a 200 fps avg is a common occurrence in BF3 @ 1080p with stock 7970s in Tri-fire when working correctly. If I have to upgrade to a 3930k to make the most of my 3 cards, I may just do that.

When you go out and purchase hardware and open the box, you automatically lose the direct resale value, so reselling them at this point would be something I wouldn't too happy with. I was considering moving to a 2600k/2700k BUT after reading about the BF3 horror stories with hyper threading, I've since reassessed those thoughts, and decided to move to the 3930k given the fact that whilst observing my CPU usage during gameplay, it was stretching up into the 90s on average which is of course taxing my CPU to its limits, even at nearly 5ghz. With the 2 extra full cores associated with the 3930k and the extra cache, I believe I'll easily be seeing 200fps+ avg in BF3 as are the other benchmarkers out there right now with a similar setup. Unfortunately, BF3's devs set an upper limit of 200fps in battlefield 3, so going beyond that is impossible, but anything above 120fps I'm happy with. If I can keep the minimums @ 120+ I'm golden, and right in that ballpark for being 'future proof' for a LONG time to come.


The main disadvantage to spending $1000+ on an entirely new platform is that games that don't make use of more than 4 threads won't see much of an advantage from X79, besides the fact that background apps and operations can make use of the other 2 cores whilst the game will have the full 4 cores to use for its needs.

Believe it or not, spending $1000 on an entirely new platform is more of a big step for me than buying these 3 cards was, as I had planned on doing this for a long time, but hadn't planned on moving to X79, I had planned on skipping it in favor of Ivy Bridge or Ivy Bridge-E.

If I can find proof that the Hyperthreading issues with the 2600/2700k are a thing of the past, I'll grab one of them, a new SSD, and the $400 2560x1440 Japanese LCD that has been floating around OCN discussions for a while that is for sale on Ebay, and be done with it. smile.gif
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post #13 of 64
I've luckily not experienced the hyperthreading horror stories. Turning HT on brings my CPU usage down from 80% to 40% while playing BF3. Performance seems about the same.
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post #14 of 64
No hyper-threading issues here either. I'd still just get the 3930K and X79 anyway. Since all games in the future will take advantage of >4 threads.


Also FWIW most comments I've seen on OCN seem to indicate that 120Hz is better than higher resolution but that is a personal preference
    
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post #15 of 64
After my kids fall asleep, I'll disable HT and check my usage.
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post #16 of 64
Just to confirm, 120hz is better than a higher resolution for a game like BF3. I'm only running a single GTX 580, and I noticed one hell of a difference with 120hz from my old 60hz Vestel.

With regards to your situation with these cards, have you tried downclocking them?

Also, it does sound more like a driver issue to be honest. If you can be bothered, test each card individually, look for any discrepancies between them. Also, what is it like with Vsync on?

Edit: Higher resolutions like 1440p and beyond etc... aren't great for gaming unless you have a massive screen to see the pixel density, you won't notice much difference from your current monitor. You would with photoshop etc... they're primarily for artists/graphic designers, zooming in and out of crazy huge pictures, with pixel perfection. I doubt you'd be doing that in BF3, don't have enough time! Or you'll get rampaged by a tank.
Edited by Roxborough - 3/11/12 at 9:51pm
    
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post #17 of 64
Hmm... settings, ultra or highest period, no msaa, post = high, 3 monitors, 5265x1050 res, 3 7970 1260/1670, 64 slot server...

2600k@5.2ghz = usage was typically pegged, 80 to 99%

2600k@5.2ghz no HT = usage fluctuated a lot more, going down to 65% at times, avg seemed to float around 80% sometimes high to 90% ish.

I wasn't paying attention to fps, but it's usually around 120fps throughout. I didn't spend anytime with ssao or hbao, but with ssao on with HT, usage drops to around 92%. ssao and hbao really makes the usage fluctuate though. That's about it for my seat of the pants experience.
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post #18 of 64
Its not a driver problem. Crossfire/Trifire 7970s work beautifully with BF3 at the moment. Something is up on your end
post #19 of 64
It's just a pure lack of CPU power, plain and simple.

What you have to think about is that with a decent overclock you're effectively running 3x GTX 590's in terms of sheer performance.

I've seen a 5.2Ghz 2500k hold back GTX 570 Tri-SLI at 1920x1200 so you can only imagine how much CPU power you need for 3 f these monsters..

Go into CCC and turn anti-aliasing quality to ADAPTIVE and QUALITY.... That will enable transparency super sample anti-aliasing on all the transparent objects and will make the IQ so much better ( Works wonders in Crysis! )

You have the spare power so why not use it....
post #20 of 64
It's just a pure lack of CPU power, plain and simple.

What you have to think about is that with a decent overclock you're effectively running 3x GTX 590's in terms of sheer performance.

I've seen a 5.2Ghz 2500k hold back GTX 570 Tri-SLI at 1920x1200 so you can only imagine how much CPU power you need for 3 f these monsters..
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