New PSU crashing my system. What am I missing??

Imthatguy

Junior Member
Oct 29, 2010
4
0
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I upgraded GPU's to a Nvidia 9600GT. I upgraded the power supply to a 450W Coolmax (model CT-450) I hooked everything up properly, triple checked everything and it was all good. Booted up and now even the most minor app is crashing my system to a black screen. This card was running fine on a 300W PSU without the PCIe connector with Borderlands, WoW, and Mass Effect 2. Now, with the new PSU and full power to the card, everything is crashing, even games like Republic Commando and Plants vs Zombies. Did I miss something, do I need to change some voltage settings in the BIOS?? Any help would be great. Spec from Belarc below.

Windows 7 Home Premium (x64) (build 7600)
Install Language: English (United States)
System Locale: English (United States)

Board: eMachines MCP61PM-GM
Bus Clock: 200 megahertz
BIOS: AMI P01-A0 08/13/2009

2.70 gigahertz AMD Athlon II X2 235e
256 kilobyte primary memory cache
2048 kilobyte secondary memory cache
64-bit ready
Multi-core (2 total)
Not hyper-threaded

NVIDIA GeForce 9600 GT [Display adapter]


 
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Imthatguy

Junior Member
Oct 29, 2010
4
0
0
Old PSU works fine. Which makes no sense at all. How can a power increase cause lower performance?
 

tomoyo

Senior member
Oct 5, 2005
418
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I don't have much experience with coolmax, but from what I can tell, they're not good psus. Wattage is unimportant. Quality of psu is many times more important. You should have bought a high quality psu instead.