Tested 2x 2870X2, No gains with HT, tested PCIE OC single card to 125, tiny gain, with HT OC no gain. Dual cards PCIE 115 no gains, with HT no gains.

Weird thing is 115PCIE would not boot with HT 2000, at 115 dual cards but would run OK with HT at 2600...i think there is something wrong with bios on the Asus...at least PCIE and SATA are decoupled as the SSD had no issues even at 125 PCIE.

Not got good single cards...im wondering if 2x 4890's would gain thru PCIE OC and then HT OC on top.