BSOD after computer is "left alone"

[CustomRig]

Hi TechSpot,

I have built a computer for someone and the person told me that it appears that whenever he left the computer "alone" for a while. Attached are the mini dumps. Here are the specs of the computer. Can someone take a look at the mini dumps and see where the problem lies? Thank you very much in advance.

Intel Core i7 930 Quad-Core Socket LGA1366, 2.8Ghz

Gigabyte GA-X58A-UD3R Socket 1366 Intel X58 Chipset

Patriot Viper Series Tri-Channel DDR3 PC3-10666 1333MHz 6GB (3x2GB) CL 7-7-7-20 Low Latency DIMM Triple Channel Kit

Western Digital Caviar Green 1000GB (1TB) SATA 3 Gb/s 64MB (OEM)

Samsung 203S TruDirect 20X SATA DVD Writer Lightscribe Black

PowerColor (AX5770 1GBD5-H) ATI Radeon HD 5770 Chipset (850Mhz) 1GB GDDR5 Dual Display Dual DVI/HDMI PCI-Express 2.1 Graphics Card

Antec Sonata III Quiet Super Mid Tower w/ Corsair TX Series CMPSU-750TX 750W ATX 12V 60A 24PIN ATX Power Supply Active PFC 120MM Fan

Microsoft Windows 7 Home Premium 64BIT

Samsung SEMA Card Reader 3.5" Bay (SFD-321F/T4XU)

Antec Easy SATA Hot Swap Hard Drive Caddy with eSATA Port

 

[Route44]

No minidump attachment. If you 3-5 please attach in one Zip file. If you only have one or two attach as is.