PSU? MOBO? Getting 4.9v on +12v

jduhgee · 04-09-2009, 09:40 AM

Hello, I just made my computer.
the specs are

phenom 9950 BE 2.6Ghz quad
Asus m3a78-T
g.skills 4gb (2 X 2GB)
g.skills 2gb (1 X 1GB)
hd4870 1gb 256bit
BFG Tech 800w PSU
Samsung 180GB HD
seagate 500GB HD
Samsung 1TB HD
mid tower case..

Well, with this... i'm only getting 4.9v on +12v..
Weird thing is that Bios reads it as 11.902v
but I used everest and speedfan and they both read it as around 4.9v
so far.. i have tried few things..
1. I took out new GPU (hd 4870) and ran windows with integrated VGA and still had 4.9v
2. I took out G.skill 2GB out and ran windwos and got 4.9v
3. I reset CMOS and ran windows and got 4.9V

Is it that PSU cannot handle all hardwares attached to it? CPU, GPU, 3xHDs.. ??
or because RAM? but I have no clue how to start about checking RAM...

My comp Works Just Fine..... It plays video games fine at 1600X1200 with High Setting so far..
I went through benchmarking and did finish with no prob.. Even Prim95 does ok for few hours at default setting...
I also got upto 3.0ghz CPU by overclocking and benchmark goes fine except prime95 had errors..
I tried to OC both CPU and GPU (of course one at a time), but when I found out i was not gettin enough 12v... I put all the settings to default...
I just hope PSU is bad, then i can RMA and atleast get another one... but... if CPU or MOBO.. i'll go crazy...

Can anyone please help me!!!

Tumbleweed36 · 04-09-2009, 10:24 AM

Quote:

My comp Works Just Fine..... It plays video games fine at 1600X1200 with High Setting so far..

Most likely the Bios is correct and your voltages are O.K. Sensor programs are nice, but not always accurate with certain motherboards.

Therefore, if it not broken, don't fix it.

jduhgee · 04-09-2009, 12:50 PM

Thank you for the reply. Well is that mean I can overclock my comp or should I not do it at all??

Tumbleweed36 · 04-09-2009, 01:21 PM

I would not worry about it unless it becomes unstable. Use it until you see issues that might be related to lack of power.

jduhgee · 04-09-2009, 02:26 PM

Thanks! may i ask one more question?

as mentioned above, i have two diff g.skills Memory..

one with 4gb(2x2gb) ddr2 1066 and 2gb(2x1gb) ddr2 800.

Im using both of them, so basically all four memery slots are used.
I was going almost all forums and info's that i could basically learn about pc.
and found out that using those two memory together is actually bad and makes a computer go slower...
is it true? should i just use 4gb (2x2gb) only? and set memory speed as 1066 in bios? since i have phenom x4 cpu?

**wrench97** · 04-09-2009, 04:13 PM

If your not using a 64bit OS windows will not see or use over 3.2Gig anyway so run the faster speed with just the 2 sticks.

jduhgee · 04-09-2009, 11:53 PM

I have windows vista ultimate 64bit OS.. does that changes? Should I use 4 sticks? now?

**wrench97** · 04-10-2009, 02:48 AM

If your running stock speeds on the CPU and not Overclocked I doubt you'll notice the ram speed difference.

jduhgee · 04-10-2009, 08:00 AM

Thank you wrench97. I guess I will use 2 sticks.. I got my cpu to 2.8 from 2.6.. if i go more it is not stable.. I got upto 3.1 but prime95 kept failed.. so I'll use 4 sticks when I go all the way back to default setting.

04-09-2009, 09:40 AM	#1 (permalink)
jduhgee Registered User Join Date: Apr 2009 Posts: 5 OS: Vista Ultimate 64Bit	PSU? MOBO? Getting 4.9v on +12v Hello, I just made my computer. the specs are phenom 9950 BE 2.6Ghz quad Asus m3a78-T g.skills 4gb (2 X 2GB) g.skills 2gb (1 X 1GB) hd4870 1gb 256bit BFG Tech 800w PSU Samsung 180GB HD seagate 500GB HD Samsung 1TB HD mid tower case.. Well, with this... i'm only getting 4.9v on +12v.. Weird thing is that Bios reads it as 11.902v but I used everest and speedfan and they both read it as around 4.9v so far.. i have tried few things.. 1. I took out new GPU (hd 4870) and ran windows with integrated VGA and still had 4.9v 2. I took out G.skill 2GB out and ran windwos and got 4.9v 3. I reset CMOS and ran windows and got 4.9V Is it that PSU cannot handle all hardwares attached to it? CPU, GPU, 3xHDs.. ?? or because RAM? but I have no clue how to start about checking RAM... My comp Works Just Fine..... It plays video games fine at 1600X1200 with High Setting so far.. I went through benchmarking and did finish with no prob.. Even Prim95 does ok for few hours at default setting... I also got upto 3.0ghz CPU by overclocking and benchmark goes fine except prime95 had errors.. I tried to OC both CPU and GPU (of course one at a time), but when I found out i was not gettin enough 12v... I put all the settings to default... I just hope PSU is bad, then i can RMA and atleast get another one... but... if CPU or MOBO.. i'll go crazy... Can anyone please help me!!!

04-09-2009, 12:50 PM	#3 (permalink)
jduhgee Registered User Join Date: Apr 2009 Posts: 5 OS: Vista Ultimate 64Bit	Re: PSU? MOBO? Getting 4.9v on +12v Thank you for the reply. Well is that mean I can overclock my comp or should I not do it at all??

04-09-2009, 01:21 PM	#4 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 19,657 OS: XP Professional	Re: PSU? MOBO? Getting 4.9v on +12v I would not worry about it unless it becomes unstable. Use it until you see issues that might be related to lack of power. __________________ ---------- I don't receive email notifications of replies to subscribed threads. (Internet provider policy) Therefore, if I don't respond to your post within 24 hours, please send me a reminder PM and include the link to your thread.

04-09-2009, 02:26 PM	#5 (permalink)
jduhgee Registered User Join Date: Apr 2009 Posts: 5 OS: Vista Ultimate 64Bit	Re: PSU? MOBO? Getting 4.9v on +12v Thanks! may i ask one more question? as mentioned above, i have two diff g.skills Memory.. one with 4gb(2x2gb) ddr2 1066 and 2gb(2x1gb) ddr2 800. Im using both of them, so basically all four memery slots are used. I was going almost all forums and info's that i could basically learn about pc. and found out that using those two memory together is actually bad and makes a computer go slower... is it true? should i just use 4gb (2x2gb) only? and set memory speed as 1066 in bios? since i have phenom x4 cpu? Last edited by jduhgee; 04-09-2009 at 02:29 PM.

04-09-2009, 04:13 PM	#6 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,579 OS: Win7	Re: PSU? MOBO? Getting 4.9v on +12v If your not using a 64bit OS windows will not see or use over 3.2Gig anyway so run the faster speed with just the 2 sticks. __________________ Power Supply and Selection

04-09-2009, 11:53 PM	#7 (permalink)
jduhgee Registered User Join Date: Apr 2009 Posts: 5 OS: Vista Ultimate 64Bit	Re: PSU? MOBO? Getting 4.9v on +12v I have windows vista ultimate 64bit OS.. does that changes? Should I use 4 sticks? now?

04-10-2009, 02:48 AM	#8 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,579 OS: Win7	Re: PSU? MOBO? Getting 4.9v on +12v If your running stock speeds on the CPU and not Overclocked I doubt you'll notice the ram speed difference. __________________ Power Supply and Selection

04-10-2009, 08:00 AM	#9 (permalink)
jduhgee Registered User Join Date: Apr 2009 Posts: 5 OS: Vista Ultimate 64Bit	Re: PSU? MOBO? Getting 4.9v on +12v Thank you wrench97. I guess I will use 2 sticks.. I got my cpu to 2.8 from 2.6.. if i go more it is not stable.. I got upto 3.1 but prime95 kept failed.. so I'll use 4 sticks when I go all the way back to default setting.