CyberPowerPC - Unleash The Power

Hi I bought a new desktop from this website in January.

I notice that when I leave the computer on for more than a couple of hours, it crashes and goes into blue screen.

The specs I bought was:

*BASE_PRICE: [+1313]
BLUETOOTH: None
CABLE: None
CAS: Azza Hurrican 2000 Full Tower Gaming Case with 4 Hot Swappable HDD Cage & (4) 230MM Fans [+7]
CASUPGRADE: Ultra Violet Reactive Kit (2xUV Lights, 2xSATA2 HDD Cables, 1 xUV Gelid 120mm High Performance Nanoflux Bearing Fan with rubber mounts, Blue Colour) [+28]
CD: 24X Double Layer Dual Format DVD+/-R/+/-RW + CD-R/RW DRIVE. (BLACK COLOR)
CD2: NONE
COOL: High-Performance Non Conductive Coolant powered by Thermochill [+9] (Red Colour)
CPU: Intel(R) Core? i7 2600K Quad Core 3.4GHz 8MB cache LGA1155 + HD Graphics ***Overclockable XXX***
CS_FAN: Default Case Fan
DONGLES: NONE
EXPAN: NONE
FA_HDD: None
FAN: Cyberpower Advanced WaterCooling Large Kit (Including 360m Radiator, 750res Pump/Reservoir, Rosa CPU Block, High CFM Fans, Tubing, and Coolant) ***Overclockable XXX*** (White Tubing - Large [+9])
FLASHMEDIA: None
FLOPPY: NONE
FREEBIE_CS: None
FREEBIE_NVVC: None
GLASS3D: NONE
HDD: 64 GB Crucial M4 Series SATA III Gaming MLC Solid State Disk (Single Hard Drive)
HDD2: 1TB SATA-II 3.0Gb/s 16M Cache Hard Drive (Single Hard Drive)
HOMEINSTALL: NONE
IEEE_CARD: NONE
KEYBOARD: NONE
MB_SRT: None
MEMORY: 8GB (4x2GB) PC12800 DDR3/1600mhz Dual Channel Memory (Corsair Value Select or Major Brand)
MODEM: NONE
MONITOR: NONE
MONITOR2: NONE
MONITOR3: NONE
MOTHERBOARD: [CrossFireX/SLI] GigaByte GA-Z68X-UD4-B3 Intel Z68 Chipset DDR3 ATX Mainboard w/ Intel Smart Response Technology & 7.1 Dolby Home Theater Audio, GbLAN, USB3.0, 4x SATA-III RAID, 2 Gen2 PCIe, 2 PCIe X1 & 2 PCI ***Overclockable XXX***
MOUSE: NONE
NETWORK: ONBOARD 10/100/1000 GIGABIT LAN PORT -- As standard on all PCs
OS: Microsoft(R) Windows(R) 7 Home Premium (64-bit Edition)
OVERCLOCK: XXX Overclocking (CPU Extreme overclock: guaranteed min. 20%, max. 30%.)
POWERSUPPLY: 850 Watts Power Supplies (Cyberpower 850watt High Performance Gaming Power Supply)
PRO_WIRING1: Professional Wiring for All WIRING Inside The System Chasis - Minimize Cable Exposure, Maximize Airflow in Your System [+19]
RUSH: NONE
SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO
SPEAKERS: NONE
TEMP: NONE
UPS: None
USB: Built-in USB 2.0 Ports
USBHD: NONE
VC_PHYSX: None
VIDEO: AMD Radeon HD 7970 PCI-E 3.0 X16, 3GB DDR5 Video Card, Eyefinity 4 capable (Major Brand Powered by AMD)
VIDEO2: None, or On-Board Integrated Graphics
VIDEO3: None, or On-Board Integrated Graphics
WAP: NONE
WARRANTY: STANDARD WARRANTY: 3 Year Labour, 1 Year Parts, 1 Month Collect and Return plus Life-Time Technical Support
WNC: PCI Wireless 802.11n 300Mbps Network Interface Card [+14]
XWNA: NONE


Can someone please help me find out what is the problem?

Thanks

I get this error message:

Problem signature
Problem Event Name:     BlueScreen
OS Version:     6.1.7601.2.1.0.768.3
Locale ID:     2057

Extra information about the problem
BCCode:     124
BCP1:     0000000000000000
BCP2:     FFFFFA80105D9028
BCP3:     00000000BE200000
BCP4:     000000000005110A
OS Version:     6_1_7601
Service Pack:     1_0
Product:     768_1

Usually happens when its idle