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Author Topic: Ridiculous power consumption with 2x7950 sapphire vapor-x  (Read 2179 times)
RustyShackleford1950 (OP)
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May 02, 2013, 01:56:35 PM
 #1
Does anyone else have these cards?
They're eating 400W per card under load!

Here are my settings:

cgminer --device 0 --device 1 --remove-disabled --scrypt -I 20 --gpu-engine 1100 --gpu-memclock 1400 --thread-concurrency 21712

Getting about 610kh/s each, screenshot:



cgminer reports VDDC as 1.125V, gpu-z confirms this

Anyone know what could be going on?
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RustyShackleford1950 (OP)
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May 02, 2013, 02:22:19 PM
 #2
Just tried some new settings

cgminer --device 0 --device 1 --remove-disabled --scrypt -I 19 --worksize 256 --gpu-engine 1010 --gpu-memclock 1250 --thread-concurrency 16384 --vectors 1

no real reduction
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RustyShackleford1950 (OP)
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May 02, 2013, 02:43:21 PM
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hah, never mind, turns out i had the kill a watt power meter plugged into a power board and apparently you get contamination from other appliances

down to a more reasonable 450w
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May 02, 2013, 03:34:47 PM
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Quote from: RustyShackleford1950 on May 02, 2013, 02:43:21 PM
hah, never mind, turns out i had the kill a watt power meter plugged into a power board and apparently you get contamination from other appliances

down to a more reasonable 450w

Was just going to say, it's not possible. Smiley
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chungenhung
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May 02, 2013, 04:48:51 PM
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why would it get contamination from other appliances??? The meter would show exactly what is plugged into it. The appliances on other sockets wouldn't matter.
RustyShackleford1950 (OP)
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May 02, 2013, 10:14:56 PM
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Quote from: chungenhung on May 02, 2013, 04:48:51 PM
why would it get contamination from other appliances??? The meter would show exactly what is plugged into it. The appliances on other sockets wouldn't matter.

I don't know, but it did originally. Now it appears to have levelled out.
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May 02, 2013, 11:20:02 PM
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Quote from: RustyShackleford1950 on May 02, 2013, 02:43:21 PM
hah, never mind, turns out i had the kill a watt power meter plugged into a power board and apparently you get contamination from other appliances

down to a more reasonable 450w

...lol good one jr
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nick0016
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May 02, 2013, 11:35:04 PM
 #8
You are doing better than my Shappire 7970 Vapor-X (540 Kh/s)...
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May 02, 2013, 11:41:59 PM
 #9
Quote from: chungenhung on May 02, 2013, 04:48:51 PM
why would it get contamination from other appliances??? The meter would show exactly what is plugged into it. The appliances on other sockets wouldn't matter.
he forgot to decontaminate the power strip with a class 3 UL certified electromagnetic interference removal solution.
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May 08, 2013, 12:56:54 AM
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Nice  Grin
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