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3 7970s Crossfire, not being utilized - Page 3

post #21 of 34
Quote:
Originally Posted by ZealotKi11er View Post

Even My HD 6990 get Bottlenecked @ 1080p by 2500K @ 4.8Ghz. Best thing to do is sell one while you can.

Serious? Thought a 2500k @ 4.5GHz was enough to keep SLI 580s happy.
post #22 of 34
Check GPU temps/clocks. They could be slightly overheating and downclocking to compensate.


Also get your CPU multiplier off of 22x!!!!! Of course you are only at 4.0ghz, even multipliers are terrible for overclocking x58 i7 9xx's
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post #23 of 34
Quote:
Originally Posted by Sumatra View Post

Serious? Thought a 2500k @ 4.5GHz was enough to keep SLI 580s happy.

It is.
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post #24 of 34
Quote:
Originally Posted by Sumatra View Post

Serious? Thought a 2500k @ 4.5GHz was enough to keep SLI 580s happy.

Actually I have 2500k @4.6 and had 3x6970s and were n bottleneck whith my 3x1080 setup. But for some reason the oc'd 920 struggled
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post #25 of 34
post #26 of 34
Make sure drivers are up to date. Install the latest CAP release. Run a game or application that supports Crossfire and max out the details.

If you have eyefinity and you've done the above, then something else is amiss. Your CPU isn't going to bottleneck you.
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post #27 of 34
cpu bottleneck thats all, either a 2600k or IB or SB-E would do the trick, overclocked of course
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post #28 of 34
Quote:
Originally Posted by DzillaXx View Post

Also for 3 7970's your i7 930 isnt going to cut it. Two would probably work perfectly fine, but LGA2011 does much better with tri/quad fire/sli.
Also Try 200x21 1.38v +/- for 4.2ghz overclock

930 i7 is what 15% slower clock per clock if even?


i7 930 is fine, you wont max out those cards on any game currently.

Congrats.
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post #29 of 34
Quote:
Originally Posted by Tom Ketchum View Post

My 7970s use about 30-50 of the cards % of usage each, and my frames keep on dipping under 60, is there anyway to make them use more? like 80%?

2 questions.

1. Do you have V-sync on?

2. Why did you spend ~1700 on GPUs and only ~5-600 on displays? get 3 120hz 1080s or get a 30". Those cards are wasted on anything less, including your 60hz eyefinity setup.
Quote:
Originally Posted by finalturismo View Post

930 i7 is what 15% slower clock per clock if even?
i7 930 is fine, you wont max out those cards on any game currently.
Congrats.

Something like 10-12% C4C IIRC.
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post #30 of 34
A 2500k with a mild OC is just fine for 2 7970s OC'd, and there's not much 2 OC'd 7970s CANT run, even in eyefinity... so I'd definitely just sell 1 of them and spend the $ on some other upgrades.
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