Calling all P190 owners with xfire

Hi All

I'm having problems with my xfire setup and had been putting it down to the ram but now I'm not to sure, so is there anyone out there running a xfire setup who has experienced any problems with ram that needs over 1.9 v (that's as high as i can get before it won't post with a pc6400 g-skill hz in), i was specificaly wondering if supplying the PCI-E via the molex connecter on my abit quadgt (as well as the two cards of course) is killing it (I'm asking the question as i don't want to start ripping my casse to pieces).

Thanx

Motherboard:Abit AB9 QuadGT Socket 755 Intel 965
CPU:Intel Q6600 @ stock
Cooling:Thermalright Ultra-120 Extreme (Socket AM2/LGA775) Heatsink with Scythe S-FLEX 1600RPM Ultra Quiet 120 Fan
Ram:G.Skill 2GB DDR2 HZ PC2-6400C4 (2x1GB) CAS4 Dual Channel Kit (F2-6400PHU2-2GBHZ) THOUGH I CAN ONLY GET ONE GOING !
GPU: 2x HIS ATI Radeon X1950 Pro ICEQ 3 V2 TURBO SILENT Heatpipe 512MB GDDR3
HDD:2x Western Digital Raptor 150GB S150/Raid0
Sound Card: On board
Case:Antec P190
PSU: As supplied with P190
OS: XP Pro with SP2


LeV