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12V low in windows (11.4v) Fine in bios. Please help :)) System unstable

V

vigobit

Junior Member
I have upgraded my system with a new PSU. A HIPER ATX 525W HPU-3S525 Triple Fan, Silent, PFC
Review: http://www.bit-tech.net/review/356
Im having instability when playing games etc. The computer simply turns itself off (and doesnt reboot)
The rails are all withing spec in bios (12v at 12.02) but in windows it shows 11.43 at idle. Doesnt seem to change much during load. This seems awfully low. I read reviews of the hiper, and it was supposed to have a solid 12V rail. Its rated at 29A max at 12V, 20A normal on the sticker.
I use 3 harddrives, 2 DVD drives, a couple of fans and a Gainward 6800LE GFX card.
It seems to drop from 11.9 in windows and to 11.8 etc. and stopping on 11.43 it seems.
(ASUS probe measures the voltages)
Any suggestions?

🙂

Thanks for your time.
sincerely

Trond V Bjerke






SYSTEM:

Power supply Hiper 525
Motherboard Asus A8N-E Deluxe

Revision 2

BIOS 1009


CPU Athlon64 3000+ socket 939

Core


Memory (2) 512MB twinmos twister 3200 C2 modules

Voltage Manually set to 2.6 volts

Timings AUTO, not sure

Primary video card 6800LE at 16v6 (6800gt)

PCI slot #1 (top) empty

PCI slot #2 empty

PCI slot #3 empty

PCI slot #4 empty

PCI slot #5 empty

PCI slot #6 (board only has five PCI slots)

Boot drive 160GB samsung 161N spinpoint 7200 8mb cache

Interface Serial ATA

Controller hosting this drive

Jumper setting not applicable (SATA)


Additional hard drive 160GB western digital 7200 8mb cache

Interface Parallel ATA

Controller hosting this drive nForce3 standard ATA controller, primary channel

Jumper setting Master


Additional hard drive 200GB Sata Western Digital

Interface

Controller hosting this drive

Jumper setting


Optical drive #1 Liteon 851s DVD burner

Interface Parallel ATA

Controller hosting this drive nForce3 standard ATA controller, secondary channel

Jumper setting Master


Optical drive #1 Pioneer DVD reader

Interface Parallel ATA


Jumper setting Master

 
1st off Trond Welcome to the Forums and being so thorough on you Rig set-up but I'm guessing you have the K8N-E Mobo because the A series is the NF4 chipset which has a different config then what you listed.
I would make sure that the P4 plug is connected properly and download the latest NVidia Drivers.
The PSU seems the be adequate enough and I would trust the BIOS readings over the ASUS probe but if they both are correct then something seems to be sucking the V's once you are in Windows.
Does the Rig just shut off or do you get a Blue Screen prior to the shut down?
 
i'm going to be guessing you're using speedfan or mbm for the readings. go to the asus website and download the latest version of asus probe. for some reason the 12v rail reading that shows up in asus probe and speedfan are off by .6 or so, my bios and asus probe show a solid 11.97 while my speedfan shows 11.4
 
Originally posted by: Reiniku
i'm going to be guessing you're using speedfan or mbm for the readings. go to the asus website and download the latest version of asus probe. for some reason the 12v rail reading that shows up in asus probe and speedfan are off by .6 or so, my bios and asus probe show a solid 11.97 while my speedfan shows 11.4
Click to expand...

yes that's a good point,on my A7N8X-X i get low +12v readings too (11.3v) with speedfan but in bios & asus probe all is good.
 
Originally posted by: Dopefiend
Just use a decent digital multimeter- the motherboard sensor readings are an approximation, at best.
Click to expand...

yeh, second that. my rig is simliar, and shows 11.5 when loaded, however using a multimer it shows clearly 12.02. I would rather believe the real mm than the software.
For the game crashing, I doubt it is the video card issue, overheating? I experienced same crashing due to overheating.
 
Yes, check the voltages with a DMM (digital MultiMeter) they you will know which is correct. Also check your mobo mfr's web site for an update to their HW monitor software. The latest version of Probe is 2.23.04 posted 11/2004.

.bh.
 
Hi guys! Thanks for quick replies!

I dont get a blue screen, the rig just shuts off.
Earlier, when i had an inadequate PSU, the system would simply reboot,,
in this case, it shuts off, and stays off. (Lights in the casing are still on etc)
I tried removing some load of the 12 v rail by removing some harddrives and fans,
and no changes in bios. But in windows a change from 1.43->1.49 on the 12V rail.
Im using Asus Probe. Ill try downloading a new version, reinstalling GFX drivers.
Sorry, it is a Motherboard Asus A8N-E Deluxe K8T800 Chipset. (nforce details where from a post i took the layout from 😉 )

Thanks for your time

I did come across this review of my PSU though:
http://www.trustedreviews.com/article.aspx?head=64&page=2297
which practically butchered my PSU 🙂 in contrast to the review mentioned in my
first post.

EDIT: And ill get my hands on a DMM and test 🙂

Thanks for your time guys


Sincerely


viGobit
 
Installed a newer version of asusprobe, now have a stable 12V rail at 12.096.
Games still reboot though. Im running 2x Twinmos 512 Sticks in dual channel,
and as far as i now they usually dont play nice in dual channel. Maybe its the memory, the timings of it, or the voltage.

Thanks guys 🙂


sincerely

vigobit
 
Originally posted by: vigobit
Installed a newer version of asusprobe, now have a stable 12V rail at 12.096.
Games still reboot though. Im running 2x Twinmos 512 Sticks in dual channel,
and as far as i now they usually dont play nice in dual channel. Maybe its the memory, the timings of it, or the voltage.

Thanks guys 🙂


sincerely

vigobit
Click to expand...


I will give an advice (which i plan to follow my self soon enough): Use memtest.
 
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