asus p4pe-x poly overhaul

[kc8adu]

had blown ost all over it.
its going back in a hot machine shop with no a/c
this is the 3rd board in that system.out of warrenty so time to fix it to last.

[Newbie2]

Re: asus p4pe-x poly overhaul

Are you sure it's going to work well with polymer capacitors?

ASUS originally designed it with normal aluminum electrolytic capacitors, so the polymer capacitors may affect its operation.

I also notice the retention mechanism is missing. If you don't know what that is, it is the black rectangular frame that the processor's heatsink clips on to.

[kc8adu]

Re: asus p4pe-x poly overhaul

yes its stable in memtest and mprime.i do these all the time like that.
and the retainer was busted due to the heat.
i put a new one on it.
noise/ripple on vcore and vdimm is a few mv at most now.

[yanz]

Re: asus p4pe-x poly overhaul

what year this board made?

[kc8adu]

Re: asus p4pe-x poly overhaul

what year this board made?

iirc 2003

[Logistics]

Re: asus p4pe-x poly overhaul

This is relevant to my interests. I have a P4PE which as of yet has not given me any problems. My 350W Antec started causing me reboots and I recapped it with Samxon's and this system has been motoring along just fine. But I've always considered giving the caps on the board attention since it's a good keeper system for me.

Can you send me a quote for the caps I need to do mine? Thanks!

[Wizard]

Re: asus p4pe-x poly overhaul

Best test is prime95 torture test, this stress load the cpu and memory at same time that how I found my first recapping effort on dimesion 8300 was not effective enough. Memtest only tests the ram and that's easy on cpu and doesn't show the enough load since memory is only few watts.

Cheers, Wizard

[jpdoe]

Re: asus p4pe-x poly overhaul

But memtest has an advantage: it gives crystal clear results. I read somewhere that prime95 results are inconclusive, in the sense that sometimes it will hang on a good PC.
So my question is: how much faith do you have on prime95 as a stability test?

[Wizard]

Re: asus p4pe-x poly overhaul

if it hangs, them something have a problem. Can be PSU, iffy video card, even board, even capacitor choice or how it was installed, too warm CPU; chase them down. Capacitors was put in with flying thick wires, shorter than 1" but it was enough to get errors. I wanted extreme stable PC. I had it with machines that very intermittently put soft data corruptions in my stuff and intermittent crashes, having to restart software etc.
This what was going on with our old server. Replaced with C2D 2.2GHz, yadda yadda all the good homebuilt stuff. No corruptions in the work data.

And prime95 does have error reporting. If it reports any, then more work on the PC to get it stable.

Cheers, Wizard

[jpdoe]

Re: asus p4pe-x poly overhaul

Thanks, Wizard. I'll give prime95 another try.

[KeriJane]

Re: asus p4pe-x poly overhaul

Hello

I have a question for this thread.....

Apparently you have successfully replaced conventional electrolytic capacitors with polymer ones for use in a high-heat environment.

Polymer caps have different characteristics than electrolytics.
so.... What is a good way to determine an appropriate replacement?

For instance .... what would make a good replacement for a 1000uf 16v Rubycon MCZ? Is there some kind of formula or cross-reference?

Thank you for any help,

Keri

[willawake]

Re: asus p4pe-x poly overhaul

half capacitance is a typical replacement. you can reduce the voltage to that expected in that location on the board. like on vcore out. electrolytics are not available in less than 6.3v but polymers are available in 2.5v or 4v.

otherwise you just compare esr and ripple and use the polymer that provides the best specs preferably exceeding that of the caps already on the board.

typical polymers for vcore applications
chemicon PSA or PSC
oscon SEPC
lots of others

[kc8adu]

Re: asus p4pe-x poly overhaul

i used 330@16 ncc ps
filled the 2 empty spots.
i also filled the empty spots on vcore.
btw 2.5v is fine.
if you exceed 2.5v the cpu is toast!