[Solved] Added 4 GB Memory and system now unstable

Hello,

I have a custom built pc with an Intel Core 2 Quad Q9300. Previously I had 4 GB (2x2) of Patriot memory installed running 32 bit Windows 7 Ultimate. Because of the development work that I do I decided I was going to enter the world of 64-bit and decided to purchase another 4 GB of Patriot memory. I installed the memory and did a clean install of 64-bit Windows 7 Ultimate and that went fine. After installing some core applications such as anti-virus and internet browsers I experience a total lockup where I couldn't use the mouse or anything and had to power off the machine. I shrugged it off and continued on, I left the machine on overnight to install some games and it blue screened. This made me start to question what was going on, so I re-seated the new memory and installed Prime 95 to test the system's stability. Within 2 minutes every test thread reported errors on Prime 95. So I removed the 4 GB I just purchased and tried it again. Prime 95 ran for an hour with no issues before I decided to stop the test.

Could the new memory be faulty? The system POST's correctly with the new memory installed. Also, I had no lockup or stability issues with the other 4 GB of memory and 32-bit Windows.

Yes; I would request an rma from the manufacturer; did you check the ram specs carefully? Is the new ram one stick or two? Is it listed on your motherboard ram qvl listing?

Try increasing the DRAM voltage slightly with all four sticks in.

Best answer selected by level9phreak.