Power supply not proper in Asrock H67

[Qiao]

Hi all, beofre starting my question, here are my system config:

• Asrock H67
• Intel i5 2500k
• DDR3 2x2gb kingston
• GTX 275

My system driver crashed with GTX 275. I made changes with Power Supply Unit (Lian Li 650W) with Nexus 650W. but still screen remain black. I reinstall my old GPU and screen started but crash problem still remain with new PSU. I check the memory using Memtest86. It shows no error. How can I fix it.

[Kingston-Guy]

First off all check your system step by step properly:

1. Turn off the system power and unplug the power cord. Remove all PnP cards (Plug and Play) and cables including VGA, IDE, FDD, COM, USB, and external printer cable.
2. Confirm CPU and DRAM is inserted properly.
3. Plug the VGA card back to the system and also re-connect your monitor, mouse and keyboard.
4. Turn on the power and make sure CPU, power supply and CPU fan is functioning.
5. If the problem still cannot be solved, please only install the necessary device of system to try. (CPU, a stick memory)

Please contact your local Asrock service center for further assistance

[Zweena]

Check the voltage ram setting. I've read somewhere that even incorrect ram voltage settings can create this problem . So reset the voltage ram according to specification given in manual. Keep to maximum voltage specification ram provided in manual