Bitcoin Forum
June 16, 2024, 09:35:07 PM *
News: Voting for pizza day contest
 
   Home   Help Search Login Register More  
Pages: [1]
  Print  
Author Topic: could anybody measure undervolted 290/x/390/x power draw  (Read 641 times)
Bwtmn7 (OP)
Member
**
Offline Offline

Activity: 109
Merit: 10


View Profile
April 20, 2017, 02:29:57 PM
Last edit: April 20, 2017, 02:46:24 PM by Bwtmn7
 #1

I wonder if someone can measure the power draw of a dingle R9 290, 290x, 390,390x  while running at 947/1250 @1.040mV while mining Zec and Eth(vs power draw at stock voltages and clocks, as 290x/290/390)
Jamitadson
Newbie
*
Offline Offline

Activity: 28
Merit: 0


View Profile
April 20, 2017, 02:47:40 PM
 #2

For the ZEC mining, my R9 390 can do 900MHz at 1.0V. The power draw is about 150W from the wall.
Bwtmn7 (OP)
Member
**
Offline Offline

Activity: 109
Merit: 10


View Profile
April 20, 2017, 03:02:15 PM
 #3

For the ZEC mining, my R9 390 can do 900MHz at 1.0V. The power draw is about 150W from the wall.
I wonde rhow have you measured this? have you compared idle vs load and calculated the effiency from the psu?
dooferorg
Full Member
***
Offline Offline

Activity: 163
Merit: 100


View Profile
April 20, 2017, 03:10:24 PM
 #4

What type of R9 390? I have an ASUS Strix I'm trying to get usable again. Anyone have a working lower voltage BIOS for one?

Do you guys flash with ATIWinFlash?

BTC: 1dooferoD3vnwgez3Jo1E4bFfgMf81LR2
ZEC: t1gnToN2HZW4GD52kofEVdijhRijWjCNfYi
antantti
Legendary
*
Offline Offline

Activity: 1176
Merit: 1015


View Profile
April 20, 2017, 04:22:23 PM
Last edit: April 20, 2017, 05:01:44 PM by antantti
 #5

I wonder if someone can measure the power draw of a dingle R9 290, 290x, 390,390x  while running at 947/1250 @1.040mV while mining Zec and Eth(vs power draw at stock voltages and clocks, as 290x/290/390)

I have a pc with 390 and 295x2, 850w gold psu. 947/1250 @1.04 mining zec is 640w at the wall, after completely removing 295x2 240w from the wall so 295x2 with those settings pulls about 400w.

With default settings 860w at the wall  Shocked

Hawaii doesn't need 1.04V for 947, most efficient settings are normally volts below 1.0 and then find that highest stable core. Zec and xmr need some bios modding but eth is not memory limited so not much to do there.

Strix 390 normally has quite high default voltage so AB -100mV is still too high. Trixx can do -200mV.

Bwtmn7 (OP)
Member
**
Offline Offline

Activity: 109
Merit: 10


View Profile
April 20, 2017, 05:58:51 PM
 #6

I wonder if someone can measure the power draw of a dingle R9 290, 290x, 390,390x  while running at 947/1250 @1.040mV while mining Zec and Eth(vs power draw at stock voltages and clocks, as 290x/290/390)

I have a pc with 390 and 295x2 on it, 850w gold psu. 947/1250 @1.04 mining zec is 640w at the wall, after completely removing 295x2 240w from the wall so 295x2 with those settings pulls about 400w.

With default settings 860w at the wall  Shocked

Hawaii doesn't need 1.04V for 947, most efficient settings are normally volts below 1.0 and then find that highest stable core. Zec and xmr need some bios modding but eth is not memory limited so not much to do there.

Strix 390 normally has quite high default voltage so AB -100mV is still too high. Trixx can do -200mV.



you say the 390 uses 240w undervolted-underclocked before or after substracting the idle power usage
antantti
Legendary
*
Offline Offline

Activity: 1176
Merit: 1015


View Profile
April 20, 2017, 06:41:32 PM
Last edit: April 20, 2017, 08:20:17 PM by antantti
 #7

I wonder if someone can measure the power draw of a dingle R9 290, 290x, 390,390x  while running at 947/1250 @1.040mV while mining Zec and Eth(vs power draw at stock voltages and clocks, as 290x/290/390)

I have a pc with 390 and 295x2 on it, 850w gold psu. 947/1250 @1.04 mining zec is 640w at the wall, after completely removing 295x2 240w from the wall so 295x2 with those settings pulls about 400w.

With default settings 860w at the wall  Shocked

Hawaii doesn't need 1.04V for 947, most efficient settings are normally volts below 1.0 and then find that highest stable core. Zec and xmr need some bios modding but eth is not memory limited so not much to do there.

Strix 390 normally has quite high default voltage so AB -100mV is still too high. Trixx can do -200mV.



you say the 390 uses 240w undervolted-underclocked before or after substracting the idle power usage

240w is that whole computer. I will post numbers without 390 later.

edit: Ok, had to do it hard way.

With integrated gpu only system idles at 40w.
Add 390 947/1250 1.04 zec and system pulls 240w from the wall so 390 adds 200w.

Usually I test with separate psu which powers only the riser and pcie connectors of that gpu, that way you don't have to guess how much gpu uses when idling.
Bwtmn7 (OP)
Member
**
Offline Offline

Activity: 109
Merit: 10


View Profile
April 20, 2017, 10:23:34 PM
 #8

I wonder if someone can measure the power draw of a dingle R9 290, 290x, 390,390x  while running at 947/1250 @1.040mV while mining Zec and Eth(vs power draw at stock voltages and clocks, as 290x/290/390)

I have a pc with 390 and 295x2 on it, 850w gold psu. 947/1250 @1.04 mining zec is 640w at the wall, after completely removing 295x2 240w from the wall so 295x2 with those settings pulls about 400w.

With default settings 860w at the wall  Shocked

Hawaii doesn't need 1.04V for 947, most efficient settings are normally volts below 1.0 and then find that highest stable core. Zec and xmr need some bios modding but eth is not memory limited so not much to do there.

Strix 390 normally has quite high default voltage so AB -100mV is still too high. Trixx can do -200mV.



you say the 390 uses 240w undervolted-underclocked before or after substracting the idle power usage

240w is that whole computer. I will post numbers without 390 later.

edit: Ok, had to do it hard way.

With integrated gpu only system idles at 40w.
Add 390 947/1250 1.04 zec and system pulls 240w from the wall so 390 adds 200w.

Usually I test with separate psu which powers only the riser and pcie connectors of that gpu, that way you don't have to guess how much gpu uses when idling.


that is a really good information, i wonder how low is the power draw when a 290/x or 390/x is giving same hashrate as 300H/s Zec or 28.5Mhs eth?
probably has similar power draw as a 7950?
antantti
Legendary
*
Offline Offline

Activity: 1176
Merit: 1015


View Profile
April 20, 2017, 11:05:32 PM
Last edit: April 20, 2017, 11:51:18 PM by antantti
 #9

i wonder how low is the power draw when a 290/x or 390/x is giving same hashrate as 300H/s Zec or 28.5Mhs eth?

With that 1.04V average 390 does ~1050/1625 (strapmod) which brings it to 400+ on equihash. I will try how much it needs to be underclocked to do only 300.

Last summer hawaii's were doing 26-27MH eth with 160-180w, must say all this open data to mod straps wasn't available back then.

edit: to do only 300 on zec you need to go really low. Needs more testing, max 120w.
Bwtmn7 (OP)
Member
**
Offline Offline

Activity: 109
Merit: 10


View Profile
April 21, 2017, 01:00:26 AM
 #10

i wonder how low is the power draw when a 290/x or 390/x is giving same hashrate as 300H/s Zec or 28.5Mhs eth?

With that 1.04V average 390 does ~1050/1625 (strapmod) which brings it to 400+ on equihash. I will try how much it needs to be underclocked to do only 300.

Last summer hawaii's were doing 26-27MH eth with 160-180w, must say all this open data to mod straps wasn't available back then.

edit: to do only 300 on zec you need to go really low. Needs more testing, max 120w.
is it measured off the wall? because 120w seems really low
antantti
Legendary
*
Offline Offline

Activity: 1176
Merit: 1015


View Profile
April 21, 2017, 05:33:48 AM
 #11

s it measured off the wall? because 120w seems really low
Yep, of the wall. Clocks are something like 776/1000, volts ~0.9...
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!