A friend of mine gave me his old video card (an 8800GTS 640mb) after upgrading his rig. My v-card is an 8800GTS 320mb. I've read many articles that say you can run this combo in SLI with a registry tweak but when I try to enable SLI through the Nvidia control panel and n-view properties I don't have any options for enabling it. I've combed the user forums at Nvidia and it seems I'm not alone but no-one has an answer that works. Does anyone have any experience setting up an SLI system with the same GPU but different memory? Or does anyone have any suggestions on getting this prompt to show up? I've tried reversing the cards, reversing the link cable, the link cable is definately on. There is no option in the BIOS that I can see. I've tried updating the drivers for the cards and the chipset to no avail. My system is as follows. Motherboard: Asus M2N-SLI Deluxe CPU: AMD Athlon 64 x2 5600 OC'D tp 3.0 ghz. 2 GB DDR2 memory EVGA Geforce 8800 GTS 640 MB EVGA Geforce 8800 GTS 320 MB Sound Blaster Audigy 2 ZS sooundcard 300 Gb SATA HDD
