I'm currently using two 512MB sticks of "Ultra" memory (the super-cheap sticks pushed by TigerDirect) with my Athlon 2900 and am experiencing frequent crashes. Memtest showed that both sticks show at least some errors. Rather than go through the hassle of using the warranty (you have to call a long distance number at your own expense before sending the memory back), I've decided just to bite the bullet and invest in some higher-quality memory. At least this way I can MOSTLY continue to use the PC while I wait for the new memory to be delivered.
I'd like to go with newegg's CORSAIR XMS 1GB (2 x 512MB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Unbuffered Dual Channel Kit System Memory Model TWINX1024-3200C2PT - Retail. They're selling it for $99 right now, which just squeaks under my $100 budget. (Yes, I still want cheap, even though I want quality.) Has anybody used this memory, and can he/she recommend it? I know Corsair is generally well-received, so I'm hoping this'll do the trick.
I am using 3200C2PT 2X512 and have been very happy with it. Currently running it at 235Mhz with 2-3-2-6-T1 timmings with no problems at all. I am getting ready to buy another pair of this memory and run 4X512.