Mike T. said:
(snip)
I've seen mixed expert opinions on cooler master PSUs ranging from (can't
buy better at any price) to (avoid at all costs). But whether the experts
are right or not (and which experts you choose to believe), ALL PSU
manufacturers put out duds now and then. Given your symptoms, if it was
my system displaying the same symptoms, my FIRST step would be to replace
the power supply. This would be a bit easier for me, as I always have a
spare power supply on hand to test with, but . . .
You do NOT need a ultra-expensive power supply to run your system, and you
do NOT need a ultra-expensive power supply to test your system with.
Something in the range of 500W by fortron, seasonic or enermax (and there
are many other good brands also) will do just fine, and any of those
should cost less than half of what you spent on the cooler master unit.
I don't think it would be premature at all to return GFX card number 2.
BSOD when that card is installed (but not the other one) clearly points to
that card being defective, probably a video RAM problem on the video card.
Unfortunately, that's not your only hardware problem. If the system won't
run stable with the non-BSOD video card installed, then you are looking at
RAM, mainboard or PSU. Most likely suspects, in order:
1) Power supply (95%)
2) Mainboard (3%)
3) RAM (2%)
But I thought I'd read that the RAM was thoroughly tested. So that ups
the power supply to 97% status. IMHO
It's not that I don't have confidence in cooler master. It's that I don't
have confidence in the power supply of ANY system that is displaying your
symptoms. (and I DO NOT CARE who manufactured the power supply!!!) I've
seen thousands of systems with similar symptoms and darned near all of
them boiled down to bad PSUs. The very few that didn't, were bad
mainboards or bad RAM. -Dave
Sorry about the post order, I was cut&pasting from the forum I'm running the
same thread on...
http://forums.slizone.com/index.php?showtopic=1824
Hi Guys,
Just to clarify, I don't think this issue has anything to do with the CPU
overheating. I reseated the Zalman Aero Flower cooler using Akasa 450 Silver
based thermal paste (Its fan exhausts to the the rear of the case and
directly into the rear 120 fan), the side panel is removed and I've just
installed a top 80mm case blower fan which blows in front of the Aero
Flower. At idle the CPU is 33 degrees C.
My latest thoughts are that the issue is a combination of GPU heat and beta
drivers...
In the past when I have overclocked the FX5950Ultra in this rig I have
encountered similar BSOD and crashes which occur when the GPU gives up, the
thing is that these crashes are affected by the temp of the GPU which
increases when you increase the clock and mem frequencies and this might be
what's happening here...
Symptoms all point to some sort of overheating of the GPU but investigation
of temps seem within limits.
I believe that it is a driver issue. Out of curiosity I checked the
frequencies of a reference card from NVidia here and it would seem the
defaults are 575/900 and my Asus 8800GTX 768 is running at 650/1045.
When I tried to click the "Custom clock frequencies" radio button to enable
the sliders (in the NTune performance part of the NVidia control panel) it
indicated a positive selection but did not extinguish the default radio
button or enable the sliders (think buggy driver). Thinking that the "Find
Optimal" button may reduce the frequencies I clicked it and saw the usual
progress bar for a second before the screen went white and the pc froze.
I had a look in RivaTuner but couldn't find any overrides for the GPU
frequencies, anyone know of a prog that will?
As I said above, I've seen these types of BSOD before whilst overclocking my
FX5950Ultra and they too have the appearance of a heat failure but because
you are aware of what you have done you throttle back to resolve the
stability issue.
It will be interesting to see if our Vista brothers and sisters are having
any luck with those new drivers that have just been released.
Andy