Patriot DDR2 high volt RAM

[TylerS]

Hi,

I am hoping someone can help me with this. I have two sets of Patriot DDR2 6400 ram:

PDC22G6400LLK (800MHz 4-4-4-12) 2 x 1 GB, 2.2v
PVS24G6400LLKN (800MHz 4-4-4-12) 2 x 2 GB, 2.1v

What should I be setting DDR2 voltage at in the BIOS?

I have been asking questions on the OC forum trying to get my OC stable and I have been getting a lot of worries about me running the RAM at 2.2v -- however, I think, I should be running it at 2.1v at least.

Is it crazy to run the 2.1v kit at 2.2?

I am not sure that I'll have to, but I am having stability issues with the RAM (maybe because it's just worn out) so I'd like to know what the "correct" settings should be for this RAM.

Thanks.

 

[Arkaign]

2.2V should be perfectly fine. It's possible that the mobo may not even be feeding the correct voltage to the memory, P35-based mobos are notorious for vdroop after a while for the CPU, and it may be also limiting the voltage going to the ram.

Best options would be to test the ram on a different PC, but you may need 2.3V to get an actual 2.1-2.2V. Alternatively, that ram may be failing. The first model you listed there is a bit older, I see references for it from 2007, so we're talking about ram made on an older fab process, larger and it will run hotter, and perhaps be more prone to electromigration.

 

[bryanl]

Use 2.20V since the LLK module is not rated reliable at lower voltages. The absolute maximum allowed by chip manufacturers for DDR2 is 2.35V.

 

[VirtualLarry]

I would drop timings down to 5-5-5-18, and drop voltage to 1.9 or 2.0v.

 

[TylerS]

Thanks guys. I thought the recommended volts was to go high with these sticks. I'm glad I asked the question.

As it turns out I may also have a couple of bad sticks with the PDC22G6400LLK 2 x 1 GB set. I have pulled them and it has significantly impacted stability along with going from 1.8, 1.9v to 2.1v.

I would drop timings down to 5-5-5-18, and drop voltage to 1.9 or 2.0v.

Good advice here given how old my components are (VL, saw your post on my other thread too. Thanks.)