4 bad sticks of ram?

[Lilmetalhead]

I am running Windows7 (32 bit) on an Asus M3A78 with 4 gb of GSkill ddr2 ram. Amd Phenom 9850 quad-core (black edition) CPU. 750w Corsair PSU. Radeon 5770 GPU. Here is the list of problems I am having: 1) USB keyboard randomly stops working. After a few mins, it starts working again. Mouse & keyboard are both Logitech & share a USB adapter. I have changed the batteries in the keyboard twice. Never have a problem with the mouse. 2) Computer goes to a black screen crash randomly. No BSOD. 3) Sims3 constantly gives me error 12 which is memory related.

I did get an error screen on restart once. Said my CPU overheated. I immediately cleaned all dust & reapplied thermal paste. Haven't seen that error message again.

I had my PSU tested & it works perfectly. I swapped out my GPU for a slightly older one that I know works. Same problems. I ran memtest on all 4 sticks of ram individually. All 4 sticks got a black screen crash with no errors showing at test 8. I moved them to the next slot on the mobo. Same thing. Tested all 4 together. Same thing. Tested them in the 2 remaining slots. Again, same thing.

Do I really have 4 bad sticks of ram or is this something deeper?

 

[Eximo]

Based on your other issues, probably motherboard failure. Check the capacitors for bulging and any other visual defects.

 

[Rookie_MIB]

Unless you had a really nasty lightning strike which damaged all 4 sticks, and considering the fact that you're having random problems with -all- your hardware, have you considered the fact that it might be your motherboard?

Overheating CPU? Random dropouts of of USB? Memory errors on all 4 sticks?

A bad motherboard could be the cause of all those things. You're running a AM2/AM2+ motherboard which puts it several generations back, and if your capacitors are going bad that would explain a lot of the issues.