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Help! -5v at 3.5v!

C

CHAoS_NiNJA

[H]ard|Gawd
Joined
May 26, 2005
Messages
1,578
I don't know how, but according to both my BIOS and MBM...my -5 on my P1 connector is at 3.5 I have no idea how this happened and more importantly how its continuing to run. I suspect it has something to do with my processor, which is a damged Athlon XP 2700+ that won't clock above 1.3GHz without having random restarts and freezes.

Anyone else ever heard of something like this?
 
ignore it
the boatd and CPU dont employ it
its been eliminated from the lastest spec
with no load on it, it reports weird

last time it was generally employed was for ISA slots
for compatibility reasons it was included in ATX12V v1.3 supplies for some older cards
but unless you had say an old R232 serial port PCI card you dont need it.

the -12V is generally the same way
 
So, would it be ok to slap a 20-to-24 pin adaptor on this puppy for my up-coming s939 system?

Its a 400w AGI, and honestly I've *never* heard of AGI. Damned thing cost me a hundred bucks even, it better not be total junk...

Just for the hell of it, here are my current voltages via Motherboard Monitor 5:

+12 @ 11.80v
+3.3 @ 3.30v
+5 @ 5.08v
-12 @ -12.35v
-5 @ 3.50v
 
CHAoS_NiNJA said:
So, would it be ok to slap a 20-to-24 pin adaptor on this puppy for my up-coming s939 system?

Its a 400w AGI, and honestly I've *never* heard of AGI. Damned thing cost me a hundred bucks even, it better not be total junk...

Just for the hell of it, here are my current voltages via Motherboard Monitor 5:

+12 @ 11.80v
+3.3 @ 3.30v
+5 @ 5.08v
-12 @ -12.35v
-5 @ 3.50v
Click to expand...


Software readings are not accurate so those don't mean much. The adapter is going to add resistance specifically on the 3.3v line and is not the best route. You really want to run a 24pin native supply. What is the model number of the AGI?
 
Its HP-P4507F5 (rev. 01). It also has the DC Output on it, which is...

+5v = /32A
+3.3v = /25A
-12v = /0.6A
+12v = /19A
+5VSB =/2A

I really wish I knew what that meant...I'm a hardware guy, I guess you could say my only real weak point is PSUs.

Also, I can't afford a 24-pin PSU. Hell, I can barely afford the s939 system. I'm on a hell of a tight budget atm.

EDIT: Oh yeah, and its not just MBM5 that has those voltages. My BIOS reads the same thing.
 
CHAoS_NiNJA said:
Its HP-P4507F5 (rev. 01). It also has the DC Output on it, which is...

+5v = /32A
+3.3v = /25A
-12v = /0.6A
+12v = /19A
+5VSB =/2A

I really wish I knew what that meant...I'm a hardware guy, I guess you could say my only real weak point is PSUs.

Also, I can't afford a 24-pin PSU. Hell, I can barely afford the s939 system. I'm on a hell of a tight budget atm.
Click to expand...

Well that PSU is not what one would call good for a ssytem that is going to be 12v heavy from the numbers.

EDIT: Oh yeah, and its not just MBM5 that has those voltages. My BIOS reads the same thing.
Click to expand...

Equally worthless the only way to really know is to use a multimeter to get the actual readings from the supply.
 
CHAoS_NiNJA said:
EDIT: Oh yeah, and its not just MBM5 that has those voltages. My BIOS reads the same thing.
Click to expand...


It should. Both programs get their information from the same chip.
 
Spectre said:
Well that PSU is not what one would call good for a ssytem that is going to be 12v heavy from the numbers.
.
Click to expand...

Well what kind of amps should I be looking for on the +12v rail then? And will this supply handle what I need it too until I can afford to get another one?
 
CHAoS_NiNJA said:
Well what kind of amps should I be looking for on the +12v rail then? And will this supply handle what I need it too until I can afford to get another one?
Click to expand...

Can't really say without a complete parts list.
 
AMD Athlon 64 3000+ Winchester Integrated into Chip FSB 512KB L2 Cache Socket 939 Processor
http://www.newegg.com/Product/Product.asp?Item=N82E16819103501

MSI K8N Neo4-F Socket 939 NVIDIA nForce4 ATX AMD Motherboard
http://www.newegg.com/Product/Product.asp?Item=N82E16813130491

XFX PVT43PUAF3 Geforce 6600 256MB 128-bit DDR PCI-Express x16 Video Card
http://www.newegg.com/Product/Product.asp?Item=N82E16814150095

KINGMAX SuperRAM 256MB 184-Pin DDR SDRAM Unbuffered DDR 433 (PC 3500) System Memory (x 2)
http://www.newegg.com/Product/Product.asp?Item=N82E16820156007

Plus two harddrives, both Seagate IDE.

EDIT: 4 80mm Quad-LEd fans, one 120mm Quad-LEd fan, 2 UV CCFLs (soon to be 4), generic DVD-ROM, generic FDD, possibly a WC system in the future with a Hydor L20 Inline Water Pump (http://www.crazypc.com/Merchant2/merchant.mv?Screen=PROD&Product_Code=9337)
 
used the full 6.2A +12V for the PCI-E (75W) you not going to actually be that high
LAN card shown is the 120mm fan, modem shown is the 4 cathodes (est. 0.5A +12V per)
SCSI card is the Hydor L20 (1.7A +12V)

http://takaman.jp/D/?M=PbQDQbdHgSATKT4kG5H5oG5HQpG5HTqG5HEZAZavXCMZ&english
which is theoretical (additive of all the maximums)

a more realistic worse case senerio (post spinup with the CPU\GPU pegged) would be
combined +3.3V & +5V wattage @ 37W
+12V @ 20Amp or 240Watts
(the two wattage figures above indicate your crossload range)
but the most important is the amp rating on the +12V rail(s)

now secondary criteria comes into play and derating the various potential supplies
since they are not all rated at the same temperature and you cant actually employ their rated specs for a direct comparision

what are you looking for, esthetics? power quality? efficiency? features? budget? quiet?
your going to want a 24 pin + 4 pin aux ATX12V v2.0 dual +12V rail supply in any event
most should be able to handle the config but giving me an idea of the relative values youd place on the above secondary criteria will help us narrow it down.
 
Thanks for picking up where I left off Ice Czar had to go do real world stuff for a moment.
 
Major Edit: You know, In light of this and a few other things, I think I'll just be sticking with my Socket A for now with a nice little Athlon XP-M 2400+ and another 512 of RAM. Even though i'm not switching, thanks for all the info guys, you really opened my eyes to what I need to buy come my next PSU.
 
then for future reference note that most everything is on the +12V rail(s) these days
dual core CPUs will run about 15% to 20% higher
the next generation of PCI-E has doubled to 150 watts
some new GPU are rumoured to require all of it plus additional auxillary power
SLi\Crossfire obviously double the Video power needed

Power Supplies are no longer an afterthoght or bundled purchase
a high quality supply that actually meets your needs being a prerequisite to stable operation,
Id also highly recommend power conditioning or a UPS
(get a PSU with active PFC for better UPS performance)
 
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