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PSU rails off??

S

Spudd

Golden Member
According to BIOS and Mother Board Manager 5, my +3.3 rail is showing up as +2.54, my +5 rail is at +4.95, and my +12 is at 11.73. Could this lead to overclocking problems and RAM errors like this 😕
 
So you recommend I get a new PSU AND return the memory? I've got 1 week left before I can return the Corsair PC3200....unless you think my probs are directly related to the PSU and that's what is causing the memory errors?
 
I don't think your computer would work with such a low 3.3. The 2.54 reading may be incorrect. The 12 and the 5 are fine...don't sweat them.
 
What PSU would you recommend? I currently have Fortron 350W. I don't want to break my wallet on a PSU though...about $50. Any suggestions?
 
hmm, when i had a cheap 300W PSU overloaded with a P4 2.4B, ti4200, 512MB DDR400, 2 optical drives and 2 x 7200RPM HDDs, the 3.3V rail was reading @ 2.8V. funny thing is, playing games never resulted in any crashes.
 
Ok, here's something weird: isn't the +3.3 V rail supposed to be the Vbat rail? If so, then according to my BIOS (instead of motherboad manager 5), the Vbat is at +3.12v. The only thing showing up as +2.54 according to my BIOS is the Vdimm. Is it possible that MBM5 just has the wrong rail being shown under +3.3 for me?

Also, and I think this is the culprit, I just ran memtest86 after WarCraft 3 crashed on me two more times with error memories. Ran test number 5 in Memtest....got 5 errors. DOH. Damn Corsair crap. I'm returning the memory. Any suggestions on my theory about the PSU? I've never had a Fortron or Sparkle Power (in my other rig) give out on me.
 
I have a Fortron 350W. Its running my Barton at 2800 MHz and my 9800 pro at 487/370.

To make sure you didn't somehow get a lemon, you should test the rails with a multi meter. Even an el-cheapo $10. one will work. Run prime95 and stick the leads in a molex. For the 3.3V you can either stick the leads in the back of the ATX or read from that one wierd obsolete connector.
 
But is Vbat the +3.3 rail? In my 8rda+ it has the +12, +5 and Vcore listed, but I don't see "+3.3" Instead, there is "Vdimm" which is running at 2.54, and "Vbat" which is running at 3.12.
 
Your PSU is fine. I've 8dra+ also and I've tried it w/ cheap 300w generic, Fortron 350W, and Antec 430w and all gives funny 3.3 rail. Mine currently shows 2.74 as 3.3 rail. I've also tried NF7-S board along with Via KT266A board and those display correct 3.3 rail.
 
Originally posted by: Naustica
Your PSU is fine. I've 8dra+ also and I've tried it w/ cheap 300w generic, Fortron 350W, and Antec 430w and all gives funny 3.3 rail. Mine currently shows 2.74 as 3.3 rail. I've also tried NF7-S board along with Via KT266A board and those display correct 3.3 rail.
Click to expand...

So the board is having a spaz attack or is flaky with MBM5 huh? Is there a place in the BIOS I can check the +3.3 voltage rating? I can't find anything there that says +3.3. Thanks for the help! 😀:beer:
 
Originally posted by: Spudd
Originally posted by: Naustica
Your PSU is fine. I've 8dra+ also and I've tried it w/ cheap 300w generic, Fortron 350W, and Antec 430w and all gives funny 3.3 rail. Mine currently shows 2.74 as 3.3 rail. I've also tried NF7-S board along with Via KT266A board and those display correct 3.3 rail.
Click to expand...

So the board is having a spaz attack or is flaky with MBM5 huh? Is there a place in the BIOS I can check the +3.3 voltage rating? I can't find anything there that says +3.3. Thanks for the help! 😀:beer:
Click to expand...
Multimeter time, dude 🙂 If you want real voltage readings, you cannot necessarily rely on the mobo, neither the BIOS nor MBM5.
 
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