This only happens for me during high loads, ie multiple iso's downloading,etc. Standard web browsing and email cause no problems. Win 7 Ultimate x64 RTM w/ NFORCE 15.35 drivers installed BFG 680i SLI Motherboard PCI\VEN_10DE&DEV_0373&SUBSYS_C55E10DE&REV_A2 PCI\VEN_10DE&DEV_0373&SUBSYS_C55E10DE PCI\VEN_10DE&DEV_0373&CC_068000 PCI\VEN_10DE&DEV_0373&CC_0680 Driver c:\windows\system32\drivers\nvmf6264.sys (7.3.1.7306, 331.41 KB (339,360 bytes), 4/30/2009 3:06 PM) Driver Provider: NVIDIA Driver Date: 4/30/2009 Driver Version: 73.0.6.0 Digital Signer: Microsoft Windows Hardware Compatibility Publisher