Mark Hahn wrote:
Be very very sure that consumer geforces can go in 1u boxes. It's not
so much
the space as much as I'm skeptical with their ability of handling the
thermal
issues. They are just not designed for this kind of work.
I've had to go to 2u and eventually to larger boxes because of power
supply and air-flow requirements. This is a big issue.
I'm a bit puzzled here. sumermicro sells servers that take either two
M1060's, or two C1060's, or two of any pcie 2 x16 cpus. their airflow
design seems at least thought-about, and their PSU is 1400W.
C1060 specs merely say "200W max, 160W typical" - which is probably
about the same as gtx275 according to wikipedia. so something like 600W
expected from 1U - not really that hard, especially if you don't
have a wall of 40u racks full of them...
A little over a year ago, a 1u 600w supply was a bit difficult to find
for < $400, and additional fans for one required buying a specialty 1u
case. I could have driven node price over $4k with CPUs, memory, a large
onboard scratch, etc. I, too, was building a proof-of-concept box at the
time. Now, it's used almost daily by several folks, and I'm thinking of
building a new POC to house 4x gx's...
And still no user interest in CUDA, and I don't have enough time to play
without user interest, with my own research program that isn't
computational science.
Note that geforces are overclocked (my gtx 285 by 30% compared to a
tesla with
the same chip)
well, they're tuned differently: gf cards have substantially higher memory
clocks and lower shader clocks. tesla has higher shader and substantially
slower memory clocks (presumably because there are more loads on the bus.)
Didn't realize. Thanks.
and are actively cooled, which means that you need to get air
flowing into the side fan. That's exactly why they put the tesla m
and not the
c into those boxes.
why is this a problem with 1U? or do you really mean "double-wide cards
don't provide enough clearance in 1U to get air to the card's intake"?
That's what *I* found, anyway. Yeah, what you said. Sorry, I thought
that was obvious. When you turn one of those cards on its side, you do
have trouble with card-width clearance.
gerry
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