Very high vcore for AMD Phenom II X4 940!!

jle617

Distinguished
Apr 24, 2009
11
0
18,510
Hello,

My brother has this setup:
AMD Phenom ii X4 940 @ stock
Biostar TA790GX 128M
4x2GB of 1066 OCZ Reapers (Running @ 5-5-5-15 2T 800mhz)
1TB Samsung F1 Spinpoint
Sapphire 4870 512mb Toxic
Corsair 850tx

I was having a problem with bootups and freezing with Left4Dead... the only reasonable fix so far was to up the voltage on the ram to 2.3v which shows at 2.25v in bios (rated @ 2.2v) (And yes the ram passed memtest86 v2.11)

My real question is why is the cpu vcore showing 1.5 then climbs to hover around 1.7-1.8v :eek: ?!?!! This cpu is suppose to be around 1.35-1.4 stock v. I checked bios/ cpuz1.5 / Hwmonitor and all of them read 1.7-1.8v !! I do not know how to change the voltage down to 1.35 for the life of me with this motherboard.

Temps at bootup is around 28/29c coldboot, then idle in windows around 38/39c using Coretemp - only the CPU showed for temps... not like my i7 where it showed Core #0-3. (Stock cooler)

I have used Asus/ Gigabyte but never biostar and I can only see an option for overvolting the cpu but not under.... ?!

I would definitely appreciate any enlightenment or advice!! I hope it's a voltage sensor problem but is that possible? Also do you think that either the MB or CPU may be defective?
 

jle617

Distinguished
Apr 24, 2009
11
0
18,510
Hello Jpain,

1. This is a Biostar TA790GX 128M Motherboard.... Lastest Bios is:
http://www.biostar-usa.com/app/en-us/t-series/bios.php?S_ID=377

2. This link has an intel quad setup totally different from what I have posted here.

3. The first paragraph about the ram was just stating earlier issues that I had with the pc, then The rest of the question is the real topic. I am asking about why the CPU voltage is reading 1.7-1.8v everywhere and is there anyway of turning it down to 1.35-1.4v with this motherboard. (I have no idea and I have read the manual and gone through bios... I only see overvolting and not undervolting.)

Thank you for your post, but I think you may have been mistaken....
 

AdioKIP

Distinguished
Jul 10, 2008
789
0
19,160
In your BIOS do you have the vcore set to AUTO or have you put in the actual voltage (1.35). I run a Phenom II in an ASUS board. When I first installed my processor I left most of the BIOS settings including the vcore at AUTO and my processor stayed at around 1.5v. When I went into the BIOS and manually set the vcore to 1.35v it stayed there never going above it. The processor is rated to handle above the default 1.35v but manually setting it helped keep it closer to this range for me.