Voltages flickering when pushing CPU

[Mortdog]

Ok...Here is the deal.
My voltages are flickering when I push the cpu in programs like
3dmark, when playing and cpu load programs.

After a few minutes of load the os goes bluescreen.
And just before when I look at the voltages, they seem to flicker and I think that might be the issue here. But I´m not sure. Maybe I just reached the max.

Win2k boots at 1530 mhz (9.5 x 160)
Reached maximum stable: 1470 mhz at (9.5 x 154). Vcore: 1.78 V
Via HM, 1.725 V in bios. Voltages stable


The Test:
1000 mhz axia @ 1501 mhz (9.5x158) (boot windows,not stable)
Idle temp 39C load 42 C
Air Cooled with Taisol CGK760092(stock fan 21 CFM) + 4 additional Titan Fans 37 CFM
300W PSU Antec? (comes with aopenhq08)
4 hardrives (2 x 7200, 2 x 5400)
2 Rom drives and geforce2mx agp
VIO=normal
MB=iwillkk266-r


First Column, Via HM Value
Second Column are voltages when idling which are stable
Third Column are the voltages under full load

Vcore= 1.92 Volt according to Via HM (1.85 in iwill bios) - 1.93 V (s)
2.5 V = 0.32 - 3.32 (stable)
3.3 V = 3.38 - 3.38 (stable)
5.0 V = 4.73 - 4.61 (stays low)
12 V = 12.13 - 12.19 (up&down)

After a few minutes I get the bluescreen.

I guess the problem might be the psu being too weak for my setup.
Do these numbers tell you anything that might lead to an conclusion? Maybe you guys are able to track down the failing part?


Thanks in advance.

[TranceBear]

your 5.00 volts numbers are way low, bad power supply. Get an Enermax and you will not have to worry anymore.

[Mortdog]

Trancebear

Is it possible that the 5 V value is the factor that doesn´t let my computer run stable at higher speeds?

[Subzer0]

i was redirected here from another post as you requested. well yes as they said man its is very low and i have the same mobo as you and i also had the same psu as you [im using the hx08]
i just went for the enermax 550watter and all my probs are gone and ontop of that this BEAST has 11 molar connectors and the usual floppy/p4 plug and 1 fan header plug wjith some other weird plug,kickass dude.

[Mortdog]

The thing is in sweden the enermax 431 w goes for like 100 us bucks and that is pretty much what I payed for the case including the psu:) So its not like I just pick up the enermax and hey I got the 30 more mhz that I wanted for 100 bucks:) But its and long-time investment, indeed.

Maybe I should connect the old psu to the fans. 4 x titan 80 mm case fans, how much would that affect the outtake from the psu?

[Josh]

Originally posted by Would71
Odd, I regularly run 4.78v on the 5v rail and it never causes any problems for me. It's almost always under "Folding load", too. Diff. board, tho.

as long as there isn't a +-5% difference your running within spec and shouldn't have any problems. my duron is running at 943 mhz and vcore of 1.93 and under load i'm 4.83 so i'm good-to-go as well.

Josh

[TranceBear]

Yes the power supply can hold you back in overclocking

[Josh]

Originally posted by Mortdog


Vcore= 1.92 Volt according to Via HM (1.85 in iwill bios) - 1.93 V (s)
2.5 V = 0.32 - 3.32 (stable)
3.3 V = 3.38 - 3.38 (stable)
5.0 V = 4.73 - 4.61 (stays low)
12 V = 12.13 - 12.19 (up&down)

After a few minutes I get the bluescreen.



wow even at idle you are not within spec. anything below 4.75 and you are asking for potential problems. i recommend browsing the AMD approved power supply list (http://www1.amd.com/athlon/power) and choosing a new power supply that is approved.

Josh

[Mortdog]

Well the power supply is approved and it is comes with the aopen fulltower hq08.

But I think it might be because of the bunch of devices that I have connected to it. 4 harddrives. 6 fans. 2 rom drives. floppy. network card. geforce2mx(clocked), h+ card. soundcard.

But it is pretty easy to find out.

I´m now gonna test to connect the harddrives and fans to the other psu I got and see if it helps.

[Cocytus]

Well using another power supply dosent hurt anything, and it dosent cost anything either

[Mortdog]

Forgot one question.

Which devices uses the 5 V channel?

[Josh]

Originally posted by Mortdog
Well the power supply is approved and it is comes with the aopen fulltower hq08.

But I think it might be because of the bunch of devices that I have connected to it. 4 harddrives. 6 fans. 2 rom drives. floppy. network card. geforce2mx(clocked), h+ card. soundcard.

But it is pretty easy to find out.

I´m now gonna test to connect the harddrives and fans to the other psu I got and see if it helps.

actually your right that your ps is approved and i saw the majority of Aopen 300 watt power supplies are approved for athlon 1400s. you sure do have alot of periphials, i'm sure you'll notice a difference when you share the load between the power supplies. good luck.

Josh

[Pitspawn]

From what I've read the 5volt is a clear indication of cpu stability. Anything below 4.7v and you better think about a new psu.

I get as low as 4.78v on my cpu at load, and it cannot overclock much because of that.

[Mortdog]

Which devices uses the 5 V channel???

I have now connected a 2nd psu to host 4 fans. and 2 harddrives so the power load on the 1st psu should have been lower. BUT NO!. It shows the same voltages

What devices should I let the 2nd psu handle to raise the 5 V???

[Mortdog]

I have now lift over 3 harddrives 1 cdrom drive and 4 fans to the 2nd psu but the 5V still doesnt raise above 4.71 idle at vcore 1.92 and 1500 mhz.

This is strange.

[Mortdog]

Well. I think I give up. Seems like it doesn´t matter how many things I disconnect from it. The 5 V wont rise at this 1.92 Vcore and 1500 mhz. Isn´t this strange?. Does the cpu drink all the juice?.

I cant motivate buying a new enermax 431 w for 100 dollars just because of the extra 30-60 mhz. I must solve this problem with my 2 psu (300 w and 200 w).

I managed to get to 1484 mhz by decrease vcore from 1.92 to 1.89 at the same time +5 rise to 1.76 V and stable at that speed. The clearly shows how much of the +5 the cpu uses. Are there any other external devices'(not powerd by motherboard) that uses the +5? If so I could maybe get some more out of it.

[SteenkyBastage]

one thing you can try to test this is to lower your clockspeed, if your voltage rises then your power supply may have been approved to run at normal speed, but the overclocking is pushing the psu's limits. i've noticed a substantial drop in my 5v when i run my 1.2 @ 1.47 (it actually will drop to 4.63v running sandra burnin) and believe that it is what limits me from higher clockspeeds.

[goman]

Hey man I have a trick you may want to try??!! If you opeen the power supply and look around you will find a trim pot ( Variable resister) if you turn this it will increase all voltages. What i did is pull the power pupply open it up hook it back to the MB, reboot the computer open MBM and start turning the pot. Note there are a couple of pots in there so mark or remember where the pot are set from the factory. As you turn the pot you will find by watching MBM that one of them will cause the voltage to rise. Note If your nerves are not as bold as min I would suggest that you jmper the ATX plug and not hook it to the MB insted use a Volt Meter. Any way if I have not confused you too much that should help and realy is not to hard to figure out and do. Hope this hels and happy OC'ing:cool:

[chaosdriven]

Originally posted by goman
Hey man I have a trick you may want to try??!! If you open the power supply and look around you will find a trim pot ...


I found a webpage describing this as well (AOpen PS):
http://www.overclockers.co.nz/ocnz/misc/psu/f1.shtml
The couple of blown power supplies that I have lying around don't seem to have any trimpots...
Haven't opened up the functional one to look at yet.