For quite a while now, I've been dealing with random in-game and out-of-game crashing (BF2, Firefox, plain Windows XP). Due to my lack of dedicated time, it's gone on for several months, but during that time, I've been slowly trying to narrow down the cause of the problem. For the record, I have had the video card and motherboard replaced (with the same model) to no avail.
Running stock settings (all G.Skill's RAM timings on their website - except for RAM frequency, which is 200 MHz), I've run Memtest86+ for about 160 hours. During that time, it completed 181 passes and produced 19 errors at 3 distinct memory locations for tests 2 & 7. Seeing this, I find myself asking the question: Does RAM tend to produce different 'patterns' of errors depending on whether it's bad or just improperly configured in BIOS? Will improperly tuned RAM tend to produce large blocks of errors? On the other side of the coin, are sparse, disjoint memory errors an indication of bad RAM?
Without knowing the answers to those questions, I've tried to move forward and retest the RAM with more relaxed settings in hopes of removing the errors. I've gone through some memory related threads here trying to learn some more about all of the different ram settings to facilitate this. I can provide additional information about RAM settings, but loosening parameters such as CPC, Tras, Trc, DRAM Drive Strength, DRAM Data Drive Strength, and R/W Queue Bypass in the direction of stability have not removed the errors (In these later tests I focused Memtest86+ on the suspected tests 2 & 7 for small memory ranges around the 3 memory locations - actually producing a larger error/pass ratio).
I'm trying not to initiate another RMA needlessly, so I would like to get some input to determine whether or not I've tested my RAM properly/enough, if the current errors are an indicator of bad RAM, and if not, what are some recommended courses of action for further testing? Please don't hesitate to ask for more information.