Hi folks,
I found many threads and subreddits where people came across my kind of errors, but none of the fixes applied so far to me. Thats where I come to ask the pros
Hardware:Litecoin BAMT 1.5 (right now running with vertminer instead of cgminer, didnt change my problems..)
Asrock H61 BTC PRO
G1610 Celeron dual core
corsair 4GB cms3
6x 270X Powercolor PCS+
2x PSU Coolermaster B700
AData 16GB USB
LAN connection
GPU connections:
I have 1 GPU 16x-16x risered (non powered) and 4 GPUs with 1x-16x powered risers (although "not needed as advertised"
)
Power connections:
5 cards:
PSU1: mobo (24pin, 8pin, 2x 4pin molex), gpu 1+2, + all powered risers.
PSU2: gpu 2+3+4
Made a ground connection to be safe. The 2nd PSU poweres on via a pin shortage (green and black, PSU_ON and GROUND). Works perfectly so far.
awkward:
When not using powered risers (but connecting the two molex pins on the mobo) all the cards with 1x risers won't be recognized by the OS/BIOS. When turning the machine on the one working card will spin its fan, stop the fan, spin it up again and boot. It will hash. But the other fans just sit spinning from the beginning, not bein recognized.
When connecting the powered risers to the PSU they will behave like card 1, get recognized and start hashing.My problem:
Not running stable. SGminer or Cgminer (both) freeze within hours, sometimes minutes. The OS is still responsive, but cgminer freezes, I can log in and watch the screen etc. When lookin in htop ("taskmanager") one of two CPU cores is running 100%. I cannot kill the process (even sudo kill -9 cgminer won't work) and cannot reboot. I need to hardreset at this point (psu). Best I made was a 10hours run.
What I tried:
disconnection card after card.
I had a double riser (riser into riser) and eliminated that error, can't tell the results yet.
connected each card with PCI-E AND riser to their PSU, no difference so far. I found on another rig that when powering each cards riser with its PSU it won't run (restart when starting to hash).
I disconnected the onboard molex - no changes.
All the hardware is brand new. Don't have any temperature issues - it's cool (mostly <75°C no matter how high I overclock, usually running <70 °C).
Cgminer won't report any errors - it just freezes. (on my 2nd rig I sometimes get a error with 511°C and 0 RPM on one card, but that's another problem.. for another time)
hashrateMy hashrate (scrypt, cgminer) has been lower than other people report. I tried many settings where people reported 470khash+ (up to 500). The best I ended up on was 435 (not stable). Here my last settings as I remember:
{
"pools" : [
{
"url" : "stratum+tcp://eu.multipool.us:3352",
"user" : "ddcoin.1",
"pass" : "x"
},
{
"url" : "stratum+tcp://stratum.dogehouse.org:3333",
"user" : "coinedd.1",
"pass" : "x"
}
],
"scrypt" : true,
"worksize" : "256",
"intensity" : "18",
"gpu-fan" : "60",
"thread-concurrency" : "16000",
"gpu-engine" : "1000",
"gpu-memclock" : "1425",
"temp-cutoff" : "90,90,90,90",
"temp-overheat" : "85,85,85,85",
"gpu-powertune" : "2",
"failover-only" : true,
"gpu-threads" : "1",
"temp-hysteresis" : "1",
"kernel-path" : "/usr/local/bin"
}
I should also note that my vertmining hashrate is lower than others get (185 vs 220). I can't find what is wrong, but I know other people are having the same issues. Gather, unlucky miners!
On a serious note: this has cost me too much money on stupid risers, fans, cable extensions, psus.. and a lot, a lot of time. Please give a miner some advice! This is not the first rig I've built, but the most fucked-up one, yet.
This thread will soon look like a log because I'll try anything. This way others can see what I tried and what the effects were. Maybe someone can find a clue to why he has this error - and maybe, maybe I'll find the error myself.
