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Author Topic: Not enough power?  (Read 329 times)

Offline grizz

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Not enough power?
« on: August 18, 2002, 10:48:04 AM »
Sys. specs first:

Asus A7V333  MB
Athlon XP 1700+ with stock H/S and fan
256 PC2100 ram
GForce 4 TI 4200
O/B sound (C-Media)
300 watt power


Now for the problems.  :D

When I first put the machine together, I was unable to run it at 1466mhz due to overheating. I knocked it down to 1144 mhz and it ran fine, though the temp was still high at mid 50 to low 60.

Today, I took the sides of the case and reset the cpu back to 1466, just to see if the temp would stabilize with a little more airflow.

It seems to run ok now, still at high 50's though. But the temp. isn't shooting up like it was initially.

Now, when I start AH, or any graphics intensive program, the voltage (12v+)  jumps to 13.3+ and the alarm goes off on Asus Probe. The threshold is set to +10%. (all settings on Asus Probe are default)

I guess what I'm asking is my power supply to small for the hardware I have? I didn't notice the voltage fluctuations initially as I hadn't installed Asus probe until recently.

Will running with the higher voltage draw damage anything/everything? How much threshold is "allowable" before I fry everything?

I'm not too concerned with the temp. right now. Hopefully that will be rectified by this coming friday when I take the box back (cpu installed by techs at store and is under warranty).

Here's an Asus Probe screen shot:
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Offline grizz

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And another ...
« Reply #1 on: August 18, 2002, 10:48:58 AM »
.
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Offline capt. apathy

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Not enough power?
« Reply #2 on: August 18, 2002, 01:16:49 PM »
I'm not sure but, I thought 'not enough power' caused your voltage to drop, increasing amps and heat.
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Offline Pongo

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Not enough power?
« Reply #3 on: August 18, 2002, 01:26:34 PM »
I have same mother board, pc2700 ram, radeon 8500 card and 1800 processor with no problems..
300 watt ps.
I think it is more likey that your cpu HS isnot mounted good enough cause your failure is heat related.  get some artic silver and remount the hs\fan I would say. see if that helps.
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Offline grizz

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Not enough power?
« Reply #4 on: August 18, 2002, 01:38:11 PM »
Capt.   that makes sense to me.

pongo....re-seating the hs/fan is first on my todo list, but it won't be until later in the week.

Will the overheating cpu affect the voltage supply like that?


I have no idea when it comes to this type of stuff, just trying to get informed.   :)

Thanks for the replies.
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Offline Pongo

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Not enough power?
« Reply #5 on: August 18, 2002, 07:17:55 PM »
no but putting it under load might draw more power and that might over heart it and shut it down. that is my assumption.
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Offline bloom25

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Not enough power?
« Reply #6 on: August 18, 2002, 11:02:08 PM »
I'd check both the CPU heatsink for proper mounting and consider trying another powersupply.  I'd recommend a 340 - 350W class power supply.

I think your powersupply has problems (either that or Asus Probe).  In 1000 words or so I could explain to you how a switching mode powersupply works, but it's enough to say that the voltage should not be spiking up like that.  That indicates the powersupply itself is not regulating it's outputs correctly, as the 12V+ line should not be going that high.

(BTW: capt apathy -> Volts = Resistance (Ohms) *Amps  If the voltage on a line drops, the current MUST also drop in a linear fashion - that's Ohm's law.

For reference:

V=I*R, I = V/R, R = V/I, where 'I' is in Amps.

Power (Watts) = V^2/R = I^2*R = V*I )
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Offline FT_Animal

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Re: Not enough power?
« Reply #7 on: August 19, 2002, 07:00:24 AM »
A Geforce of any model *needs*  400+ Power Supply. No less then 400.

Geforce works on CLEAN data, Dirty data and low power will make it cough blood. A under powered AGP slot will also cause probs. ASUS had AGP probs with GF about a year ago.

If this is a VIA Bios chipset make sure it has the proper update. They had probs with this for quite a while.


Quote
Originally posted by grizz
Sys. specs first:

Asus A7V333  MB
Athlon XP 1700+ with stock H/S and fan
256 PC2100 ram
GForce 4 TI 4200
O/B sound (C-Media)
300 watt power


Now for the problems.  :D

When I first put the machine together, I was unable to run it at 1466mhz due to overheating. I knocked it down to 1144 mhz and it ran fine, though the temp was still high at mid 50 to low 60.

Today, I took the sides of the case and reset the cpu back to 1466, just to see if the temp would stabilize with a little more airflow.

It seems to run ok now, still at high 50's though. But the temp. isn't shooting up like it was initially.

Now, when I start AH, or any graphics intensive program, the voltage (12v+)  jumps to 13.3+ and the alarm goes off on Asus Probe. The threshold is set to +10%. (all settings on Asus Probe are default)

I guess what I'm asking is my power supply to small for the hardware I have? I didn't notice the voltage fluctuations initially as I hadn't installed Asus probe until recently.

Will running with the higher voltage draw damage anything/everything? How much threshold is "allowable" before I fry everything?

I'm not too concerned with the temp. right now. Hopefully that will be rectified by this coming friday when I take the box back (cpu installed by techs at store and is under warranty).

Here's an Asus Probe screen shot:
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Offline bloom25

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Not enough power?
« Reply #8 on: August 19, 2002, 12:02:44 PM »
340W or 350W is plenty.
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Offline grizz

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Not enough power?
« Reply #9 on: August 19, 2002, 06:47:45 PM »
Bloom,

I read your first reply and checked power settings in my bios.

These are the readings:

vcore   1.80
+3.3v   3.31v
+5v       4.99v
+12v     12.54


These readings didn't change when I reset CPU speed to 1466 from 1100.

I suspect PC Probe is giving erroneous readings. That is my guess anyway.  :)  

I haven't had any real problems with the comp. It hasn't failed on boot-up, just that PC Probe was warning of +12v power increase when I switched CPU speeds. However, since the bios isn't showing these fluctuations....is it safe to assume PC Probe is the culprit?

The cpu temp. isn't climbing like it was since I removed the sides of the case and allowed more airflow but it still seems a bit high. (57c)  I am still going to reseat the HS/fan with ArcticSilverIII. But now I'm not so sure there is/was a problem with the power supply.


Thanks all for the replies.....I'll learn this sh*t yet!  :)
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Offline Kubwak

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Not enough power?
« Reply #10 on: August 19, 2002, 07:55:36 PM »
i have a similar set-up

athlon xp 1800+ with stock h/s and fan
a7s333 mobo o/c at 136/sumtin
256 mb ddr
gf4 ti4200
300w power supply

runs at around 49C in AH.  still get a lot of ctds, some lockups and some reboots but i still love playing AH in it.

was just wondering why my friends intel pcs didnt have those problems but that was during AH1.08

one of these days i'll check my Vcore and possible bad memory

regards,
kubwak
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Offline bloom25

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Not enough power?
« Reply #11 on: August 20, 2002, 08:23:07 PM »
I'd suspect PC Probe.  I've found in the past that it gave false readings on fan rpms, so erroneous temperature readings don't surprise me.  (Uninstall PC probe and download "motherboard monitor 5" which is free and see if it reads the same.)

I would remount the heatsink with good thermal paste rather than the pad.  My 1900+ OC to 2012+ runs 46C full load with the stock HSF.
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