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Yousuf Khan
I had the same thing and cured it by raising the CPU voltage slightly.
Charlie
Were you overclocking? I'm not overclocking, at the moment.
Yousuf Khan
I had the same thing and cured it by raising the CPU voltage slightly.
Charlie
I actually did get one at one time, but it turned out to be bad, so I
returned it, and I never bothered again.
Yousuf Khan
In comp.sys.ibm.pc.hardware.storage Yousuf Khan said:I currently have a desktop with a Zalman 600W PS, it was a pretty nice
PS a few years ago when I got it, but now it looks like the system has
been upgraded and grown again, and I'm starting to see signs that it's
not producing enough power for the components anymore. So I'm looking at
the market for bigger PS's, likely 750W+.
When I got the Zalman, multi-rail +12V were the de riguer feature of the
day. Now that I'm shopping for them again, I see that the manufacturers
have done an about-face, and they are advertising the advantages of
single-rail +12V. The old 600W had 4 rails at 16 Amps each. The new
single rails I'm seeing seem to have a rail at anywhere from 45A to 65A!
Why have the manufacturers done the about-face on single-rail vs.
multi-rail?
Were you overclocking? I'm not overclocking, at the moment.
Yousuf Khan
No, but I had lowered the voltage to reduce the heat. Its an I7 CPU.
That didn't help much so I got a different heatsink which did help. When
I looked at the Event logs I noticed that the optical drive errors
started at about the time I lowered the voltage, so I raised the voltage
and haven't had an optical drive error since (about 1 year).
No, but I had lowered the voltage to reduce the heat. Its an I7 CPU.
That didn't help much so I got a different heatsink which did help. When
I looked at the Event logs I noticed that the optical drive errors
started at about the time I lowered the voltage, so I raised the voltage
and haven't had an optical drive error since (about 1 year).
I suspect marketing. The onld ones were not really muti-rail
either, more like "multi-rectifier". For proper multi-rail
you have to have a regulator, power switches, rectifier and
power-transformer for each rail.
It is also possible that recitifers have gotten better.
Yousuf said:Probably, but the effect was the same, namely that each of the 4 +12V
channels were limited in the amount of current they carried.
Yeah, it had better be, or else I should be smelling smoke quite quickly.
Yousuf Khan
Well, then it seems like you put the CPU back to its recommended
settings. My CPU is already at its recommended settings.
Yousuf Khan
The only way a rectifier gets better, is by disappearing.
In the picture here, the rectifier on the secondary is
replaced by a MOSFET.
("Synchronous rectification")
http://www.onsemi.com/pub_link/Collateral/AND8460-D.PDF
Yousuf said:I currently have a desktop with a Zalman 600W PS, it was a pretty
nice PS a few years ago when I got it, but now it looks like the system
has been upgraded and grown again, and I'm starting to see signs that
it's not producing enough power for the components anymore.
mainly the optical drives
sending controller error messages even when they are not being used, and
I'm also noticing some occasional spin retry errors on a few of my
internal HDD's.
Yousuf Khan wrote
Bit-Tech.net says the 1GB Radeon 6870 uses from 128W - 247W.
Power estimators aren't very good and usually give numbers that
are way too high, and when XbitLabs.com took actual measurements,
they got this (associated article goes into much more detail):
Or you could plug your system into a Kill-A-Watt and multiply
the watt rating by about 80% to get the needed PSU wattage.
BTW the maximum capacity of a PSU varies with temperature,
and many years ago PC Power & Cooling said an Enermax rated
for 550W @ 25C (room temperature) dropped to 366W @ 40C
(not much hotter than some case interiors) and 244W @ 50C.
If the drives are PATA instead of SATA, have you tried
tightening the power connectors from the PSU? The
connectors are metal tubes, and prying between them and
their surrounding plastic can make them fit more snugly.
I did not raise the voltage back to where it was. Just enough to stop
the errors. I'm not saying that your errors are caused by the same
thing as mine. Just giving you something else to try.
The only way a rectifier gets better, is by disappearing.
Arno said:Standard concept, but too expensive with transformers.
In this case you will likely stikk have errors on occasion.
You need to raise it to where the errors apprarently stop,
and
then a bit more.
Of coruse if the errors are non-critical,
you do what you did. But you should be aware that this
can also cause other errors that may not be as visible.
Arno said:Standard concept, but too expensive with transformers.
Arno
Bit-Tech.net says the 1GB Radeon 6870 uses from 128W - 247W. Power
estimators aren't very good and usually give numbers that are way too
high, and when XbitLabs.com took actual measurements, they got this
(associated article goes into much more detail):
www.xbitlabs.com/images/coolers/system-wattage/p40.png
I did not raise the voltage back to where it was. Just enough to stop
the errors. I'm not saying that your errors are caused by the same thing
as mine. Just giving you something else to try.