G41M-P28 video problem

Question

Hi!
My video driver keep restarting in games.
First I had an Ati Radeon HD 5450 512MB but read that G41 boards don't really compatible with Ati cards higher than 5xxx so switched back to my Radeon X1600 256MB but the restarting still don't stop.
It is pretty random, with the 5450 it restarted for about 10 times in 5 min then was fine sometimes even for a few hours, sometimes it isn't restarted but the screen stayed black and needed to restart comp.
With the X1600 it restart less times and sometimes I could play for hours until it crashed, also when the driver fails it less likely restarts, usually just go black screen and comp locks or get blue screen.
Without cards its more stable but even with the integrated video it restarts or freeze sometimes.
Do I missing some bios or jumper setting? I bought the comp pre assembled a few months ago so the components should be compatible and be able to handle at least an old X1600. I tried XP SP3, Win7 32B, 64B, installed the newest drivers every time, tried both win update and manual install from the official Ati website but nothing worked.
System spec:
Pentium Dual-Core E5700 3.00GHz
MSI G41M-P28 (MS-7592)
BIOS : AMI V26.8 08/26/2011
4GB DIMM DDR3 PC3-10700U DDR3-1334 (9-9-9-25 4-34-10-5)
Radeon X1600/X1650 Series  (12 PS3.0, 5 VS3.0 499MHz, 256MB 297MHz, PCIe 1.00 x16)
Hitachi HDS5C1050CLA382 500.1GB (SATA300, 3.5", 5700rpm, NCQ, 6MB Cache)
TSSTcorp CDDVDW SH-222AB (SATA150, DVD+-RW, CD-RW, 2MB Cache)
Microsoft Windows 7 Ultimate 6.01.7601 (Service Pack 1) 32B
PSU: CIT-450W P4, 115/230V 7A/4A 50/60HZ

Answer 1

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The webshop I bought it from sold dozens with the exact same config and they are still one of the best rated in eBay.
The shop may have a very good rating, because they have friendly personnel, good prices, deliver fast etc. etc., but that does not mean the stuff they sell is any good.
Your CIT-450W PSU is junk, that is for sure. And your Colorsit 420W device is not only old, but of very low-quality as well.
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even the lower priced Corsairs are too expensive
That may be, but you have to understand that it is impossible to pay £12.95 for a 450W PSU and expect it to be a reliable power supply.  Mate, this IS actually the most important component in your while system.  Every single other component depends on it!
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I'm not quite sure if it's really a psu problem.
You cannot be sure until you test a device that is not some low-quality china cracker without manufacturer support.
Bring your system into a computer shop and let the people there test a proper PSU.  Then you know for sure.