How worried should I be if RAM won't do rated timings & speeds @ rated voltage?

[Viper GTS]

I've been beating my head against the wall trying to find the source of my random crashes. Of course stupid me I wait until I'm about ready to sell all my SLI stuff & move to X38 + Crossfire before I break out the memtest.

Sure enough, at factory prescribed timings & voltages I get errors in less than 15 minutes. I'm running 8 gigs of this stuff:

http://www.ocztechnology.com/p...ade_2gb_module_4gb_kit

800MHz DDR2
CL 5-6-6-18
(CAS-TRCD-TRP-TRAS)
1.8 - 2.0 Volts*

I've upped the voltage to 2.1V & it's been running longer than the first test. Assuming it runs all night with no issues should I just be happy? Is this perhaps a side effect of running 4 DIMMS vs 2, or should I go ahead & take the time to test each stick individually?

[EDIT]Well scratch that it just started spewing red. Guess it's time to label the sticks & start testing. [/EDIT]

Viper GTS

 

[myocardia]

Running 4 sticks usually requires raising the northbridge voltage a notch, and two if overclocking. Were you aware of that?

 

[Viper GTS]

I've tried a huge range of NB voltages to no avail.

I've dropped it to one stick & already have one that produced errors. I'll test all 4 individually & see what happens, if I have just one or two producing errors I'll assume it's memory.

I'm running the stock timings with the memory at or below its rated frequency, I don't expect (or desire) to get over the rated speed.

Viper GTS