I see, you tried 0.96 and then 0.94 gave you the .7 volt VRM output voltage?
a hard reset and power cycle brought it back to high voltage again
it is screaming now holding ~525 at BTCGuild (just think if I had the other 59 cores)
10 min mark:
Block: ...fac0e16a #265429 Diff:268M ( 1.92Ph/s) Started: [01:10:24]
ST:2 F:0 NB:3 AS:0 BW:[ 50/ 34 B/s] E:2764.94 I:38.45mBTC/hr BS:141k
4/709 50.0C | 571.0/504.2/506.6Gh/s | A:167 R:10+0(5.6%) HW:6766/6.8%
--------------------------------------------------------------------------------
KNC 0: 46.0C | 142.5/136.8/133.8Gh/s | A: 45 R: 3+0(6.2%) HW:1140/4.4%
KNC 1: 43.0C | 142.2/135.6/133.4Gh/s | A: 41 R: 6+0( 13%) HW:3804/ 12%
KNC 2: 42.0C | 134.8/129.1/134.5Gh/s | A: 45 R: 0+0(none) HW:1112/4.5%
KNC 3: 50.0C | 106.2/102.7/104.3Gh/s | A: 36 R: 1+0(2.7%) HW: 712/3.7%
--------------------------------------------------------------------------------
20 min mark:
Block: ...fac0e16a #265429 Diff:268M ( 1.92Ph/s) Started: [01:10:24]
ST:2 F:0 NB:3 AS:0 BW:[ 48/ 34 B/s] E:2903.21 I:39.55mBTC/hr BS:141k
4/709 50.0C | 549.3/511.4/511.0Gh/s | A:272 R:15+0(5.2%) HW:10175/6.4%
--------------------------------------------------------------------------------
KNC 0: 47.0C | 144.0/138.7/136.6Gh/s | A: 75 R: 4+0(5.1%) HW: 1762/4.2%
KNC 1: 43.0C | 143.8/137.9/137.8Gh/s | A: 67 R: 8+0( 11%) HW: 5858/ 12%
KNC 2: 42.0C | 135.6/131.2/131.7Gh/s | A: 73 R: 2+0(2.7%) HW: 1557/4.0%
KNC 3: 50.0C | 107.7/104.6/105.6Gh/s | A: 58 R: 1+0(1.7%) HW: 1025/3.3%
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Observations:
temps are up about 7-10C each board (to be expected)
the one board (KNC 1) that was really low on HW errors when not overclocking, has the highest, while the others are all under 5%
similar amount of cores as last test (gained that one back to 709)
we'll see how this goes after a few hours...since my temps are still lower than many people's non-overclocked jupiters it looks sustainable. (all 4 VRM boards) Dropping the fans to the crossbars does help in these situations
I should change the PSU though, it is only an 850watter
Update: close to an hour and running strong on BTCGuild - 533.87 GH/s 546304 (99.72%) 1536 / 23040 / 0
I've followed your example and I'm getting similar results. Much hotter but much faster despite my gimpy board #3.
I wanted to note (in case you hadn't stumbled upon it) an easy-button way of getting all the cores activated instead of the race-condition method you seemed to be describing earlier.
Basically, the /etc/init.d/cgminer.sh script enables the cores as it prepares to launch cgminer. However, if there is already a screen session active, the script will fail....but not before it does it's core enabling mojo. So basically what I did was reboot the machine...screen -rd, create a new screen terminal with ctlr-a,c , download/compile/install bfgminer per Luke-Jr's script, killall cgminer, /etc/init.d/cgminer start (which subsequently fails due to existing screen session), start bfgminer. Hope that helps someone
Also, previously my board #3 would get something on the order of 30% hardware errors on .7V, but now it's basically the same as the "good" boards 1 and 4 with .9V and kicking ass. Might not have to RMA this sucker after all :p And yeah...totally /agree on the PSU thing...glad I bought a 1000-watt unit as I'm pulling 920W now.Connected to stratum-lb-usa48.btcguild.com diff 256 with stratum as user x
Block: ...6afcad37 #265438 Diff:268M ( 1.92Ph/s) Started: [02:59:02]
ST:2 F:0 NB:2 AS:0 BW:[ 70/ 64 B/s] E:1874.99 I:41.76mBTC/hr BS:353k
4/768 54.0C | 536.5/536.4/540.2Gh/s | A:237 R:16+1(6.7%) HW:5718/7.9%
--------------------------------------------------------------------------------
KNC 0: 46.0C | 143.6/134.2/135.6Gh/s | A: 57 R: 5+0(8.1%) HW:1904/ 10%
KNC 1: 54.0C | 143.6/135.6/133.2Gh/s | A: 63 R: 4+0(6.0%) HW: 923/5.3%
KNC 2: 49.0C | 143.3/134.9/141.6Gh/s | A: 65 R: 2+0(3.0%) HW:1565/8.5%
KNC 3: 45.0C | 142.9/135.1/131.2Gh/s | A: 53 R: 5+1( 10%) HW:1339/7.4%