need to raise Vdimm with four DIMM slots filled?

[VirtualLarry]

Just wondering if it is common practice or necessary to raise Vdimm a notch, when you fill all four DRAM slots on a mobo, or if it is fine to run all four slots populated at stock voltage?

 

[Cutthroat]

I had to raise VDIMM to run 4 sticks. In fact it won't even POST with 4 sticks at default.

 

[n7]

Sometimes yes, sometimes no.

Try without...up it if it's needed for stability (or to POST! :Q).

 

[Yellowbeard]

Originally posted by: VirtualLarry
Just wondering if it is common practice or necessary to raise Vdimm a notch, when you fill all four DRAM slots on a mobo, or if it is fine to run all four slots populated at stock voltage?

If the Vreg on the MOBO is good, you shouldn't have to raise Vdimm. Any single slot should get the set voltage regardless of how many are filled.

However, with 4 up it is more likely you'd need to raise the voltage to the memory controller. This is very common.

 

[Team42]

I had to raise vDIMM, and (G)MCH, using 4 x 1Gb sticks. But only by one notch. It's only done when it's a necessity, rather than being common practice. If you can get your system stable without it, happy days! But as the posts above indicate, 4 sticks makes it just that little bit harder to manage at stock voltages.

 

[desolate]

I'm using 2 x 2GB a-data ddr2-800 sticks and 2 x 1GB OCZ ddr2800 sticks for 6GB and I raised voltage to 2.0v with +0.1 to (G)MCH and they've been running fine

At stock they were having some problems...so in some case you might have to raise the voltage a bit.