My Asus P5WD2-E Premium has a cold bug

[I_G]

It won't start at all with the Vapo. It will flash the power light for a nanosecond and that's it. I unbolted the evap head and stuck an HSF on there and it booted right up. It's not the CPU because it works just fine at subzero in the 955X board. I isolated the problem down to the temperature of the CPU/socket when it tries to boot.

I've set both CPU and motherboard temp monitors to 'ignore' and disabled onboard CPU temp monitoring. Still no go. Any ideas out there or is it RMA time? Thanks for your input.

[ibby]

i think u maybe over tighting the screws from the vapo head onto the mobo, causing flex in the pcb.

[mikeguava]

it's the cpu not the motherboard. Try to boot before the evap temps reach -30C and you should be good

[ibby]

It's not the CPU because it works just fine at subzero in the 955X board
never heard of a mobo having cold boot issues.

[I_G]

it's the cpu not the motherboard. Try to boot before the evap temps reach -30C and you should be good

That's where I'm going next, but the CPU has no problem at all booting at -10 and benching at -46 on the board I'm currently using, the Asus P5WD2 Premium.. I've been booting this CPU at -10 for about a month. :confused:

Should I expect to run into condensation issues if I start booting at higher temps?

never heard of a mobo having cold boot issues.

Neither have I, but the CPU boots just fine at subzero in my other two LGA 775 boards. The only thing that is different is the motherboard. I'm thinking maybe it's RMA time...

[ibby]

put some of the de electirc grease in the socket :)
it will slove it all.

maybe some condensation is getting in.

are u using a homemade kit to mount the vapo head on the cpu

[crotale]

You set ignore on CPU Fan too?

[I_G]

You set ignore on CPU Fan too?


Ignore CPU fan, Ignore CPU Temp, Ignore mobo temp, disable CPU throttling. :confused:

[I_G]

i think u maybe over tighting the screws from the vapo head onto the mobo, causing flex in the pcb. There are stops on the threads so that it can't be overtightened. pressure is maintained by the use of springs.

put some of the de electirc grease in the socket :)
it will slove it all. Yep, did that.

maybe some condensation is getting in. I didn't see anything when I checked. Looked dry as a bone.

are u using a homemade kit to mount the vapo head on the cpu Nope, genuine Asetek with new gaskets.

[crotale]

I would set it to 1.20vcore and remount the evap and try to start the system at +20C.

[I_G]

Sounds like a plan. Is there a purpose to lowering the vcore other than reducing the heat output? And should I expect condensation different from what it's been from starting at +20 and taking it down to -46 in a minute or less?

Do you generally use the AI booster for overclocking in Windows or do you overclock through the BIOS? I have heard that AI booster can sometimes be more trouble than it's worth with small FSB advancements and required reboots. I tried it once but don't remember why I didn't like it.

[crotale]

Sounds like a plan. Is there a purpose to lowering the vcore orther than reducing the heat output? And should I expect condensation different from what it's been from starting at +20 and taking it down to -46 in a minute or less?

Do you generally use the AI booster for overclocking in Windows or do you overclock through the BIOS? I have heard that AI booster can sometimes be more trouble than it's worth with small FSB advacements and required reboots. I tried it once but don't remember why I didn't like it.
Just to lower heat output. Try and see if it POSTs or not. I think Fugger has tried a Vapochill on a P5WD2-E board, so maybe it's just your board that is bad. :(

I boot at 333FSB with a suitable multi and then up it in AIBooster depending on what to run.

[I_G]

I sent one email to Asus describing the problem and they sent back an RMA #, I guess that tells me something! :rolleyes:

[vanovich]

it is the board.my mate had the same problem,these boards dont lik - degrees.he couldt get it to boot normally iether with his mach II.with water or air is no prob. and the cpu is for sure ok under vapo.

[LarsK]

I have exactly the same problem with my P5WD2-E Premium and my Mach II GT. When the Mach II GT usually boots when it hits -50°C on the display, it powers up for a split second and then dies again.

If I leave it for a few seconds, I can start it up by shorting the power connection on the mobo with a small screwdriver, then the Mach II GT starts up again, and I'm fine. That is until I need to restart windows for some reason.

Now I thought it might be the cpu, so I have also disabled everything in hw monitor that would make a difference. Doesn't matter. For a while I thought I needed the temp to be above -30°C on the display to boot, but not so. I just booted @ -51°C several times this evening.

I'm convinced this is somehow related to the same "shut down and start up again" bug that the P5WD2 also had when restarting at ~280+ Mhz fsb. Somehow I'm sure it sends a wrong signal, since the Mach II GT also shuts down. Now trying to boot the P5WD2-E P while the Mach II GT is starting up is a "no go". It also won't boot when it's supposed to be started up. Only when the Mach II GT has started up, and then mobo and Mach II GT has shut down again I can start it up by shorting the 2 power pins on the mobo. I have to wait a little while though.

Also I think this mobo doesn't handle high fsb very well compared to my P5WD2-P (955x chipset), or maybe I just need better cooling on the NB.

[crotale]

I've got a -E board but havn't got the time to test it with phase change yet.
This sounds awfully annoying anyhow!

Has anyone tried the new BIOS for the -E board?

[LarsK]

I've got a -E board but havn't got the time to test it with phase change yet.
This sounds awfully annoying anyhow!

Has anyone tried the new BIOS for the -E board?

I tried both 0206 and 0302 and both seems about the same (at least I have the same odd boot problem with both, and get the same odd spontaneus reboots when running 3d apps at around the same fsb, but then I haven't tested them extensively. I'll try better NB cooling today, I'm thinking that might help.