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Another CPU bottleneck question (i7 920 gtx 670 sli)

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August 12, 2012 6:39:47 PM

I have a i7 920 @ 3.2 Ghz (Can't seem to get mine past 3.2) - I recently added a 2nd GTX 670 for SLI, but I am a little disappointed in the FPS in Battlefield 3 multiplayer.

If I run it on ultra @ 1080p in a large 64p server, there are definitely FPS drops to the 30s-40s which I wasn't expecting. Do you think my CPU is bottlenecking these cards? If so by how much?
August 12, 2012 8:16:18 PM

I wouldn't say it's bottlenecking, because most games will run fine off dual GTX 670's and a i7 920 without any kind of bottleneck.

That said, BF3 multiplayer and 64mp in particular, is extremely demanding on on CPU's (even Quad Core i7's) and having a higher clock on your i7 will help boost FPS if that makes any sense?
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August 12, 2012 8:20:59 PM

Definitely, so it's not bottlenecking but a higher clock would still increase my fps.

How much of an fps increase do you think I could get if I upgraded to a 3770k? I have someone willing to buy my current mobo and i7 so I wouldn't be out too much money. Worth it?
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August 12, 2012 8:21:47 PM

popatim said:
He's getting 30-40 fps minimum on a 64 man server and complaing. LOL

I think you're missing the point, thats really pretty dam good.


It's not a smooth 30-40 though, I can see stutters/jitters when it dips to those numbers.
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August 12, 2012 8:21:48 PM

He's getting 30-40 fps minimum on a 64 man server and complaing. LOL

I think you're missing the point, thats really pretty dam good.
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August 12, 2012 8:52:13 PM

I have a 2500k @ 4.2 and a single gtx 670 and almost never dips to 30-40. It is probably a driver issue for sli that is not resolved yet try disabling one gpu and also run evga precision and see what happens.
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August 12, 2012 8:58:42 PM

jecho said:
I have a 2500k @ 4.2 and a single gtx 670 and almost never dips to 30-40. It is probably a driver issue for sli that is not resolved yet try disabling one gpu and also run evga precision and see what happens.


No, it's his 3.2GHz i7. If the OP got a newer i5 or i7 and overclocked it to 4.2GHz + he would see a pretty steady framerate increase. I know because my Dual 6970's and 2500K OC'd to 5.1GHz never dip below 48FPS in 64 player games. If you get a a 2600K and OC even to 4.5GHz I'd bet you'd get close to 60FPS most of the time.
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August 12, 2012 9:19:32 PM

well I had a single 670 for a while before I bought the 2nd, and I did see an improvement in SLI, just not a constant 60+. so stant1rm might be right.

So, since I can't get my i7 920 past 3.2 (it's the oldest revision so that's probably why), would it be worth it to upgrade to a 3770k?
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August 12, 2012 9:34:07 PM

If all you do is game, an i5 is just a good as an i7. HT is useless for gaming, but it is useful for content creation software.

A 3570K is good, but honestly for gaming the 2500K probably a better bet. It overclocks so much better. You could probably hit 4.5GHz with a Cooler Master 212 EVO. The thermals on the 3570K get out of control when you bump up the voltage for OCing. It's a well known problem of the Ivy Bridge series of chips.

A good, well priced motherboard would be this one http://www.newegg.com/Product/Product.aspx?Item=N82E168...

And either one of these would make great gaming CPU's, but I give the edge to the 2500K for the better overclocking.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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August 31, 2013 1:33:28 PM

vromanowski said:
I have a i7 920 @ 3.2 Ghz (Can't seem to get mine past 3.2) - I recently added a 2nd GTX 670 for SLI, but I am a little disappointed in the FPS in Battlefield 3 multiplayer.

If I run it on ultra @ 1080p in a large 64p server, there are definitely FPS drops to the 30s-40s which I wasn't expecting. Do you think my CPU is bottlenecking these cards? If so by how much?


I got a i7 920 @ 4.0GHz with a 7950 at 1150/1575 and I get on ultrasettings playing BF3 assault large mode with 64 personas al set to ultra constant 57 frames , try to oc it to 3.8 ; 4.0 .
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September 1, 2013 1:12:44 AM

I'm surprised that no one has mentioned micro-studdering yet. It still kinda plagues multi-GPU set-ups.
Try disabling one GPU and see if it still dips.
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September 13, 2013 1:48:30 PM

That's because he's specifically talking about Framerate drops. Microstuttering is a different phenomenon.
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September 13, 2013 1:59:11 PM

Moving from the i7 920 to the I7 3770k Ivy would be a significant performance kick out of ther box without OCing ( even more so with a Haswell ).
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