Overclocking gtx 670's in sli.

[setter]

Im running two gtx 670 wf x3's in sli. For games they run anything im playing grand at stock speed. However, id like to get a bit more out of them for benchmarking. The top card, (purchased a year ago) is a pretty decent clocker, +130 core/+770 memory. Bench stable at theese clocks. The lower card i bought recently, ive yet to test it by itself. But trying with both at +90/+500 synced in afterburner results in driver crashed errors with heaven etc. Would i be best of testing the newer card to find it's limit, then run both at theese clocks in sync. Or can i run both unsynced at different oc settings. Stock boost speeds per card are.

Gpu 1, 1189 mhz

Gpu 2, 1150 mhz

Memory speed on both at 3005 mhz.

 

[setter]

Does make sense, cheers mate.

Just now with both synced, ran them at +80 core, +500 memory. Resulting in boost clocks of.

Gpu 1, 1267 mhz core, 3506 mhz memory, stock boost is 1189 core, 3005 memory.

Gpu 2, 1228 mhz core, 3506 mhz memory, stock boost is 1150 core, 3005 memory.

Completed fire strike fine, fans set to 85%. Temps of 70c and 54c. Ill post result in the fs thread.

 

[setter]

Ive considered a modded bios, possible that it might give my waeaker card a bit of a boost. And allow the better one to run even higher. Problem still regardless is keeping the top one cool. The pitfall of non ref cards in sli.