I posted on this forum a week ago with symptoms of graphics (and sometimes sound) freezes. This appears mainly (and reliably) with FSX, and did occur occasionally with this new system of mine in FS9.I had expected that it could be the PSU, and so today installed a 500W PSU to replace my previous 350W unit. The problem still occurs, however I'm glad to have the potential of a PSU issue now resolved for the future.While the case was off and when I was testing to ensure that all fans were operating, I noted that one of my RAM sticks was much hotter than the other, in fact it was too hot to touch for any more than a few seconds. The other could be touched continously, and while certainly warm, it wasn't as hot.I dowmloaded MemTest86. For a while all appeared OK, then once I was into the 32-bit pattern testing the red lines of test data started spewing off the DOS screen. I'm assuming a memory issue :)MemTest86 halted a bit later, with an "Unexpected Interrupt, Halting" message. The test sequence was into the 2047M block of a 108K-2048M test. Is this normal with a bad memory? Should I be looking elsewhere as wel, or instead of the memory?Thanks for any advice. System specs:AMD 64*2 4500+ / ASUS A8N32-SLI / Corsair TWINX 1048M 3500LL (2*1 GB)/ nVidia 7600GT, 256M / WinXP HomeBruce.

Hi Bruce, I'ld say either a bad stick or your CPU/chipset isn't compatible. Probably the former. Did you try one stick at a time? Good luck and kind regards Jaap

Thanks Jaap.The chipset is an nForce4, and since the manufacturer includes my CPU as an option I'm assuming (hoping) that I don't have a compatibility issue. I intend to replace the 2 sticks with 2*512MB that I have here from my previous system (uses the same memory), and double check that it is the RAM. I was about to build my wife a new system using these parts, but that's on hold until I get mine sorted :)Bruce.