overclocking psu and voltage help

[ludenwulf]

I've recently been reading up on overclocking and and also getting some great advice so far. But I've run into a problem hitting my goal. I'm try to get to a fsb of 200 on an amd 2500 barton. Doing the folling I've been able to reach 185. Adding a volcano 10+ slim cpu cooler and woring on case cooling. Increaseing the cpu voltage from default: 1.65 to 1.70.
But here's whats happening. Ater maybe an hour the computer turns itself off and returns to bios. When it happens it sounds kinda like a power surge. At the time my cpu temp under load is at 46.
I'm thinking it's one of two things.
Either my psu can't provide enough juice or stability. Or I need to increase the cpu voltage even more? If the problem is the second, then I should think of getting a better cooler? I know increaseing the voltage also creates more heat.

 

[PiMpShiN]

well i know your method of cooling is not too good. what brand is your psu?

you can raise the voltage going to the cpu, what would increase stability.

 

[Mico]

Well...46C is getting up there in the temperature range. I would reccomend getting a better CPU heatsink and fan. Something of the SLK or SK series. As posted above, it may be a weak PSU, though with those sysmptoms, it may be a BIOS safety feature catching the heat. Sounds like your case needs better airflow...can you describe or give a link to your case and give the setup of your fans?

 

[ludenwulf]

I agree, I thought this cooler would keep temps a little lower but I was wrong. Here's one fan I'm thinking of useing instead, a ThermalRight SLK-947U. From what I heard it's a pretty good cooler.
The psu I'm useing is the stock one that vame with the antec case. It's 300 watts. I do have a bios safety feature on that beeps whaen the cpu temp reachs 53 degree's But I never hear it when this happens. If the voltage is the problem, how far should I increase it? I don't want to raise it to unsafe levels if thats what it takes. The increments start at 1.65 to 1.67-1.70-1.75 and so on.
I've taken some pictures of my cooling setup and ill post them later today. But here's what I have. 2 fans for intake, 2 for exaust and one slot cooler under the video card. The fans are also the stock ones that came with the case.

 

[Axis]

I agree, I thought this cooler would keep temps a little lower but I was wrong.

I have that same heatsink and before I got the WC it kept my barton 2500 @ 3200 speed with 1.65volts under 42c.

I thought it did a good job. Before getting a new hsf try taking it off, cleaning it and reseating it.

What are you ambient temps?

 

[ludenwulf]

Here are two pictures of my cooling setup. Also I decided to buy the ThermalRight SLK-900A cooler with a Panaflo 92mm High Output fan. After I put this sucker in ill try to up the voltage. By the way, how do you install the fan on these types of heatsinks?

 

[ludenwulf]

pic 1

 

[Mico]

You should have no problems...all I could figure is that the heatsink was misseated, but it's good that you are getting the SLK-900. Hopefully, that should give you a nice fix. Antec PSU's are fairly good, but I would suggest you test the rails at overclocked speeds with a multimeter, and buy a Fortron 350w or higher if they fall within the 5% of variance. (5% too high, or 5% too low)

 

[Mico]

Ah...now that I see the sencond pic...
Are the front 2 fans blowing in, and the back two blowing out?

 

[ludenwulf]

The heatsinks miss seated? Are you sure it might not by the angle the photo was taken at?
The heatsink and fan should arrive around Wensday, I paid about 40 for just the heatsink, so it had better help
About the psu. Where can find a multimeter? is this a program I can download or somthing external? If my rails fall below what I need to reach the speed I'm going for, what does that end up causeing? I can post my speeds later when I have a chance to check. Someone else was helping understand what rails meant, but I'm still unsure.

 

[ludenwulf]

Oh I forgot. The bottom fans are blowing in and the tops out.

 

[Mico]

The misseating of a heatsink mean inefficient contact between the chip and the HS itself.

A multimeter can be picked up at a radioshack, Ace hardware, home depot, walmart, target...anywhere with basic electrical supplies should have them.

Well...the 'rail' is like the power circuit. If a 'rail' drops too low, due to either overclocking, or just having a lot of high power components, you might be getting only 11.2 Volts instead of 12V. Beleive it or not, that is a lot of difference.

If your rails are too low, you lose stability, and gain the possibility of killing something.

 

[asw7576]

Sometimes the FET IC become very hot and you lose the stability up to certain limit. When you OC your system, FET IC produce ON and OFF at much faster rate to supply necessary power to CPU, Chipset, VGA, Memory. Excessive heat is obvious especially when you OC PSU voltage rails eg. 12.60V, 5.36V, 3.60V.

You can find out which components get excessive heat by running the computer under full loads eg. looping 3DMark2003, and carefully touch the components on the motherboard and vga. You'll be surprise with some components producing enourmous heat.

 

[ludenwulf]

Thanks for the help guys. I'm pretty sure my psu's rail voltage does fall below 12 when I move beyong a fsb of 166. But I tried a little test to messure the heat. I clocked th fsb to 185 and ran lockon for about 10 mins. I started to get grphic glitches and eventual lockups. Then I took a fan and aimed it towards the cpu. After that everything worked fine. I think my cpu temp before this was around 47. With the fan it stayed below 40.

 

[Susquehannock]

Thanks for the help guys. I'm pretty sure my psu's rail voltage does fall below 12 > > > > > > >

As long as you are within 5% you shuld be fine.
(11.40 - 12.60)
Don't knock yourself out over a few hundredths of a volt.

 

[ludenwulf]

I'm not where my values fall at this speed but I tried to hit my goal 200 on the fsb with the fan. At first it refused to load. So I raised the cpu volatge, (from 1.65 to 1.75) and windows came up this time. But after a few minutes it rebooted. I took a look at my temps and they seemed fine. Rock steady at 38. So I know heats not the problem. Is there anyone out there with a 2500 amd running at these speeds that could tell me the voltage thier useing?

 

[444]

You don't mention what multi your using?

 

[ludenwulf]

What do you mean by multi?