Originally Posted by mduclow
Can someone tell me how accurate Everest is in reporting voltages? It seems accurate in most respects, but I am getting some noticeable NB voltage increases over what I am setting in the bios.
It actually seems to over-volt by about .05 volts, and also varies/fluctuates quite a bit with load. Here's an example:
CPU -- 236 x 17 = 4012Mhz
NB -- 236 x 11 = 2596Mhz
RAM -- 236 x 3.33 x 2 = 1571Mhz
HT Link -- 236 x 8 = 1888Mhz
CPU-NB VDD -- 1.3125v
CPU-NB Voltage -- 1.362v
DRAM voltage -- 1.75v
... boot into Windows
Everest, idling, shows NB voltage @ 1.384v. Set Prime95 to run a custom test of 512k - 1024k, starts at 1024 and a few seconds in the NB voltage reads 1.416v and within a minute or two all cores have failed with rounding errors, which means it wants more volts, right? Lower NB volts cause it to reboot with this test. But isn't that already a lot of volts for 2600Mhz NB? Temps for the NB are about 47-49c under load right now.
What does everyone think about this? Is this indicative of a bad IMC? Or do I just need to crank up the volts?
First, regarding Everest. Depending on where you're reading your temps/voltages, whether it be on the on screen display (OSD) or the "Sensors" page, you have to adjust in the properties how often it refreshes. I noticed in my OSD that the temps didn't match up with Coretemp
. I checked the refresh rate, it would only refresh every 5 seconds. Coretemp I have set to refresh every 0.5 second.
As for voltage fluctuation, that is perferctly normal. The voltage regulators (VR's) usually handle this task. Unless the fluctuation is a huge amount like lets say 0.10v on the cpu, then I'd get worried.
As for your NB, use a memory tester first like memtest
(Memtest 4.00 you can run fromyour desktop) or you can use S&M v1.9.1
(scroll down until you find it) which has a built in memory tester (use the wizard to set tests up). If you memory is deemed stable then run prime.
And as you've noticed, prime doesn't tell you where you failed. Run S&M 's CPU test @ 100% load and if it fails it'll tell you where it failed. If you get an L1 cache failure, you need more volts. If you get an L2 or FPU failure your temps are too high. Be forewarned that S&M does get your CPU hotter than prime so make sure you have adequate cooling.