4gb anb blue screen

[slomiany]

I had 2gb od ram (dual chanell) and I have recently bought 2gb more of the same memory (Corsair Dominator 1066mhz 5-5-5-15). While 2 gb are working properly even overclocked, 4gb cause blue screen when they ran at 1066 mhz. I tried to increase the voltage to 2.2 but it doesn't help. My system is stable only when I drop the speed to 850 mhz. I have Vista 64 bit, Gigabyte p35-dq6 and core2duo e6850. PS. My problem is similar to the Camnipoten t's - he also had to decrease the speed of ram and found no other solution.

 

[boonality]

The Corsair Dominator memory is 800MHz memory, just backed by Corsair to run at 1066 in a 1066 capable motherboard. When you introduce 2 more DIMM's you look at a slew of latency/voltage issues that generally don't arrise at stock clocks (800MHz... even for the 1066 dominator).

 

[dagger]

The Corsair Dominator memory is 800MHz memory, just backed by Corsair to run at 1066 in a 1066 capable motherboard. When you introduce 2 more DIMM's you look at a slew of latency/voltage issues that generally don't arrise at stock clocks (800MHz... even for the 1066 dominator).

Most 1066mhz ddr2 out there are just factory overclocked 800mhz sticks. Should have seen that coming.

 

[Shadow703793]

@OP: RAM natively higher than DDR2 800 has compatibility issues. Many users reports and my personal testing has shown that there is a very good chance you will run in to issues with RAM higher than DDR2 800, such as DDR2 1066.

 

[boonality]

@OP: RAM natively higher than DDR2 800 has compatibility issues. Many users reports and my personal testing has shown that there is a very good chance you will run in to issues with RAM higher than DDR2 800, such as DDR2 1066.

A note on this point, this is ESPECIALLY true for P35 motherboards.

 

[dagger]

A note on this point, this is ESPECIALLY true for P35 motherboards.

750i and 780i suffer from this also. It's basically everything except x38/48.

 

[jitpublisher]

I have noticed that some custom builders won't even offer 1066 ram in 4 stick configurations. They will offer 2 sticks at 1066, and 4 sticks of the same the exact same memory advertised at 800 only. I guess there are issues trying to run 4 sticks at 1066.

 

[slomiany]

Thx, I should have checked that earlier... Anyone want to buy Corsair RAM?

 

[boonality]

shoot just run it at 800, still plenty fast

 

[dagger]

shoot just run it at 800, still plenty fast

Good advice. You need more than 2gb anyway.

 

[sailer]

I had a similar thing happen to me this morning with my X48 board. I added a couple more sticks of ram, going from 4 gig to 8 gig and at first the computer wouldn't turn on at all. I examined it closely and made sure all the wires were in place, just to make sure I hadn't knocked anything loose. I didn't find anything out of place, but I had to make sure. On the next try it started to boot and I got an overclock failure. A couple more tries and it finally booted up and with the overclock in place. As for the ram speed, its running at 854 mhz at the moment. I've been running Prime95 for a few hours now to verify stability. I suspect, but don't know for sure, that with all the new variations of ram and 64 bit OS systems, etc, there is going to be a lot of learning as to what works and what doesn't.

 

[dagger]

I had a similar thing happen to me this morning with my X48 board. I added a couple more sticks of ram, going from 4 gig to 8 gig and at first the computer wouldn't turn on at all. I examined it closely and made sure all the wires were in place, just to make sure I hadn't knocked anything loose. I didn't find anything out of place, but I had to make sure. On the next try it started to boot and I got an overclock failure. A couple more tries and it finally booted up and with the overclock in place. As for the ram speed, its running at 854 mhz at the moment. I've been running Prime95 for a few hours now to verify stability. I suspect, but don't know for sure, that with all the new variations of ram and 64 bit OS systems, etc, there is going to be a lot of learning as to what works and what doesn't.

That's strange. I ran 8gb of oced 800mhz at 1066 just fine, stress fully stable, but at 2.2v (highest rated voltage for those sticks). The timing had to be loosed to 5/5/5/18 or it wouldn't even enter windows though. Ended up tuning it back to 800 at 4/3/3/12 timing. Have you tried loosening timings?