Intel D845BG doesn't run 2x1G memory

[Orso]

Running an old Intel D845BG, Pentium4 1.8 Ghz, with 2 512Mb memories and XP SP3. System working fine; I'm trying to add more RAM, using 2 new 1GB PC2100 266Mhz, non ECC sticks. The system boots normally and runs for a while, then the screen, cursor and keyboard freeze. Running only one stck at a time it seem stable. Have run Memtest86 with the 2 sticks on, got "Unexpected interrupt halting" after a few mins. OCCT with my old sticks on gives 33-42 C temp. Unable to run it with the new.
Any help?
Thanks,
Andrea

[James]

http://www.intel.com/support/motherb.../cs-013126.htm

In theory it should run with up to 2GB of RAM, however, there are a few caveats in that compatibility document. Biggest thing I can think of is to double check the voltage requirements on your new DIMMs, and make sure they fall within the guidelines.

[Orso]

http://www.intel.com/support/motherb.../cs-013126.htm

In theory it should run with up to 2GB of RAM, however, there are a few caveats in that compatibility document. Biggest thing I can think of is to double check the voltage requirements on your new DIMMs, and make sure they fall within the guidelines.

Thanks James,
I checked that and it seems to be ok. The MBO only accepts 2.5V memories and my new ones, being DDR PC 2100, need just that.

[James]

Are you running the stock SPD settings on the RAM? Or have you customized the timings (Like CAS, RAS, etc.)?

[Orso]

Hi James, thanks for following my thread.
I'm using the stock SPD. Last night I downloaded a cipset update from Intel, although the update specs did not refer to the memories. By the way after that I was able to run the Memtest with both the new memories on. Found 2 errors in test 5, but let it go on until this morning when I found the system frozen at the test 4 of pass 3. Forced restart, run memtest again, the system froze. Run OCCT; temp. was 35 at the beginning and 32 at the end, the frequencies have always been within the limits with a little overclock (+3%) a couple of times and generally down-clock (- .1%). After 45 min. the system froze again. My assumptions are against the memories. I do not have another desktop, so I have to rely on memtest. Going to send the memories back. I'm trying to learn, I'll appreciate any further suggestion.
Thanks again,