Voltages Advice and other question

aggiestudd07

aggiestudd07

Gawd
Joined
Oct 1, 2006
Messages
528
eVGA 680i motherboard:
CPU Core=1.325V
CPU FSB=1.4V {changed after pic taken}
Memory=2.1V
nForce SPP=1.4V
nForce MCP=Auto(1.5V)
nForce SPP<->MCP=Auto(1.2V)

Currently only oc'ed to 3 ghz due to instability when prime95 is left running overnight. Is any one of those voltages too high?

Also, what is the System BIOS Cacheable and does it help any?

DSC00094.jpg


DSC00095.jpg
 
Set the CPU core to 1.4
CPU FSB to 1.3 (no higher, higher can burn your board.)
Memory to 2.2 or 2.3v (depending on airflow)

And set all of:
SPP
MCP
SPP TO MCP

To the lowest value that's not "Auto". Change the MCP to 1 notch above the lowest value later for stability if required (it's usually not)

Then try Orthosing at a higher core speed. Increase CPU voltage as needed.
 
i recently just burned out a set of memory a couple weeks ago, so i will keep that to 2.1v. i had it set to auto in the bios but it had it set at 2.3v, and i bet most ppl will agree thats a little too much

so you think the instability is vcore too low at 1.3v?

why would you change all of the nforce voltages lower?

do you know anything about the bios cacheable?

i will play with the others and see if they work, thanks for the advice.
 
Most high performance RAM is rated for 2.2v. If you're running your RAM and CPU unlinked, set it to whatever your RAM is rated at.

If your RAM burnt out with 2.3v you have really bad airflow, which needs to be addressed.

You reduce the Nforce voltages as the chips really don't need increases in voltage until very high FSB settings.

If you're Prime is failing, the number one cause (other than RAM instability) is CPU voltage being too low.
 
i'll give your advice a shot, but airflow is good, it was def voltage that killed the ram.

i posted this in a previous thread asking about airflow
that fan at the top is blowing directly down onto the ram, very cold ambient inside the case (except for next to the gtx of course)

DSC00048.jpg


DSC00050.jpg
 
Temps look high to me. I guess it kind of depends on ambient. Looks like you have plenty of CPU HSF exhausting into the case exhaust, that&#8217;s a good thing.

I wonder about that lower 80mm fan, could you move it to the front of the case? It could be disrupting case air flow and trapping cool air below the GPU. Ambient temps around my GPU can be 20c higher than room ambient. If your case has a side vent for the GPU that should be enough.

It looks like you are kind of looping the airflow from the upper chamber (hottest part of case) through the CPU HSF and up into the PSU or directly out the back. I would try for a simple in the front out the back kind of thing cooling memory -> CPU then out the back. Get that hot air out of the case asap. Something like this http://www.widowpc.com/2005/06/cooling_a_gamin.php

The System BIOS cacheable should be disabled modern O/S&#8217;s don&#8217;t communicate with BIOS like in the old days.

Nvidia GPU ex doesn&#8217;t work on all cards and is only an advantage to some Nvidia cards that might add up to ½ FPS I also have that disabled.

Hope that helps, good luck
 
You must log in or register to reply here.
Back
Top