davoo 6/10. Too many unsleeved multicoloured wires around. Also run the CPU power lead below the graphics card or behind the mobo. Keep working on it mate, it has taken me ages to get mine as it is...
Took a little while this afternoon to get my cables into better shape

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CPU Intel Core 2 Quad Q6600 G0 |
Motherboard Gigabyte GA-X38-DQ6 |
Memory OCZ 4GB Kit (4x1GB) DDR2 800Mhz CL4 ATI Certified |
Graphics Card Sapphire ATI Radeon HD 3870 XT 512MB |
Hard Drive Samsung Spinpoint F1 500GB |
Sound Card Asus Xonar D2 |
Power Supply Corsair HX-620W |
Case Coolermaster Cosmos RC1000 |
CPU cooling Nexus HOC-9000 |
GPU cooling Stock |
OS Windows Vista Business x64 SP1 |
Monitor Samsung Syncmaster 2232BW 22" |