I've been on a mac for the last 5 years and I haven't had to tinker with my three year old gaming rig till now. I'm a little rusty on this stuff.
My rig has been ROCK solid till now even if it is getting a bit dated. Originally I had a 2GB (two 1GB) Ballistix kit running at 4-4-4-12 at 800mhz. I I decided the other day to pull the trigger on another set of used Ballistix 1066mhz RAM after I found out that the 1066 stuff is really just 800mhz overclocked. I read about a lot of people complaining that the 1066 wouldn't get up to speed correctly, etc. I figured I wouldn't have an issue because I just wanted to run the RAM at 800mhz, same as my old. So, I slapped the RAM in my system, fired it up and immediately found out that windows xp 32bit only supports 3.25gb of memory after I troubleshot for an hour. OK, that's fine. Beside that I was having other issues as well. Lots of BSODs, freezes when I would get past the BIOS screen to the windows screen, etc. I was running all my RAM at that point at 1.8v and 4-4-4-12 @ 800mhz. I'm not interested in getting to 1066 because I understand AMD memory controllers can only handle 1 DIMM per channel at that speed and I have four. (at least mine can't). I use memtest, all 4gb of memory comes back clean with a preliminary hour long test (I stopped at test 7).
Still getting issues. BSODs, unable to POST, freezes while booting windows with memory errors, etc. Classic memory errors. Long story short, I eventually run 3GB of RAM(including my old 2.0v kit which I thought was 1.8v) at 2.2v and with the BIOS auto settings of 5-5-5-18 to eliminate the possibility that 32bit winxp was not interfacing correctly with the oversized amount of RAM. Witcher 2 ran like a champ. Civilization 5 ran like a champ. BUT I was playing Civ 5 the other day for maybe 3 hours and the system crashed to a BSOD with the "stable" 3GB config with loose timing and high voltage.
I know it is the new memory. Maybe one of the DIMMs isn't flawed but I'm concerned about the fact that I haven't yet been able to get these things stable where I want them, which is 800mhz, 4-4-4-12, identically timed all the way through. Having said that, memtest comes back clean.
The RAM is not identical. My BIOS wants to run the new 1066 stuff at 125.7ns trfc (i hope that is the right number). The old RAM runs at 105ns. Since the new stuff is rated at a higher voltage, speed, etc, shouldn't I be able to run it at 4-4-4-12 at 800mhz with identical settings to my old ram? Could the fact that part of my ram is running at 125.7ns vs 105ns trfc be the source of the intermitent memory errors? Can someone help me troubleshoot this stuff? I have a feeling that it isn't just a dud DIMM because the ram is capable of being stable under load, even with win xp only recognizing 3.25 gb and the new stuff being undervoltaged. It just doesn't last. I attached some CPUID screens. I hope you can see them. Oh, I didn't include GPU but I am running a XFX Radeon 4850 512mb