BSOD when i try to play or render

Hello, sry about my english, my computer get many blue screens when im trying to play or render o make something it use to many resources from it. Ive change the vga card to a new and still getting BS (9800gt to GT630). Ive change the porwer suply from 450 watts to a 600 watts "Overtech" because ive thought it was ther the problem but i still getting BS.
I dont know what to do, need help. Thanks for read and help me.

Hi,

Update from Realtek's website:

Rt630x64 Rt630x64.sys Wed Oct 19 08:12:55 2011 (4E9EBEC7)

Please attach a screenshot of CPU-Z first tab, one of memory tab and one each for each stick of RAM of SPD tab.

Thx for helping me, here there are screenshots u asked. waiting for a solution, im tired to dont understand whats happend with my pc. Thanks again.

After updating the Realtek driver, if any more crashes (it didn't cause them though):

Replace the RAM entirely and it will fix the issue. You can contact the RAM maker and they will exchange for you. Show them this thread and request a matched set.

Best of luck and enjoy, when you receive new RAM.

(You should take RAM out and re-seat it first to ensure that the sticks are in well, before contacting them. For their benefit as well as yours, it's also a good idea to update bios to newest.)

HI thanks for help me, ive updated realtek sound driver, i have change old 2 slots of RAM for a new 4gb ddr3 simple slot kingston and i still get shotdown my pc. I dont know what else to do. Pls help...

Let's see new CPU-Z screenshots about it all, to see if new memory is set well. Also, latest crash dump please, to verify.

If it isn't, we'll change it so it is.

If it is, then quite possible that you have blown caps on the motherboard, specifically near and around the CPU. Is this motherboard older? You should inspect them, even the ones under the heatsink if any, for leaking electrolyte from tops or bottoms and also see if they are perfectly flat or not.

ok ill see what u told me to do. may be tomorrow ill post some news. thanks for ur unconsidered help.