trick to get more stable vdimm on the dfi nf4!

[saaya]

big thx to bigtoe again








UPDATE:
pretty late yeah, but better than never
here are results from my rig (dfi nf4 fortron 350W) using the trick
i have the 3.3v rail set to 3.51v here is the vdim i meassured chosing different vdimm options in bios

<TABLE BORDER WIDTH=600><TR><TD>vdimm set in bios</TD><TD>vdimm idle</TD><TD>vdimm load</TD><TD>3.3v rail idle </TD><TD>3.3v rail load</TD><TR><TD>3.0v</TD><TD>3.09v</TD><TD>3.09v</TD><TD>3.51v</TD><TD>3.48v</TD><TR><TD>3.1v</TD><TD>3.20v</TD><TD>3.20v</TD><TD>3.51v</TD><TD>3.47v</TD><TR><TD>3.2v</TD><TD>3.31v</TD><TD>3.30v</TD><TD>3.51v</TD><TD>3.47v</TD><TR><TD>3.3v</TD><TD>3.38v</TD><TD>3.32v</TD><TD>3.50v</TD><TD>3.47v</TD></table>

so it looks like the dfi nf4 overvolts vdimm by almost 0.10v
this means you should set your 3.3v rail to 3.5v+ and select only up to 3.2v in bios. this should result in a pretty stable 3.3v vdimm voltage. to make sure you get a really nice and clean 3.3v vdimm id suggest to set your 3.3v rail to 3.6v. for vdimm above 3.3v i suggest you use the 5v vdimm feed and get a 20 to 24pin psu adapter if your on a 20pin psu and dont want to upgrade. to everybody who uses this trick, keep in mind that sata hdds and other components of the system use this rail as wel and it might make them unstable or kill them over time
never heard of it, but theres always a risk you should be aware of