3x ASUS R9 290x, help with low hash rate

[endlessred]

Hi all. I've just started mining on my first mining rig. It has 3x ASUS R9 290x (so far), running BAMT 1.3. Below are my cgminer.conf settings:

Code:

"intensity" : "20",
"worksize" : "512",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "33792",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-engine" : "1000",
"gpu-fan" : "40-70",
"gpu-memclock" : "1500",
"gpu-powertune" : "20",
"temp-cutoff" : "99",
"temp-overheat" : "95",
"temp-target" : "90",
"temp-hysteresis" : "3",
"shares" : "0"

Hardware:

2x 1200w PSU (I plan to add more cards when this is resolved)
ASRock Z87 Killer
3 cards are on 16x - 16x powered risers
BIOS set all 16x lanes to Gen1
4GB RAM
Pentium G3220
3x ASUS R9 290x-4GD5

With this setup, each card is churning out an average of 800Kh/s, with approximately 5% failure rate, which is pretty sad considering that overclocked 280's can do that much. More importantly, I'm already overclocking the memory; if I run it at standard clocks, the hash rate drops to a mere 670

I've tried tuning the engine/memory clocks, lowering/raising thread-concurrency, changing worksize, but nothing seems to be working. Don't mind the fan speed - it's in a 24/7 air-conditioned room, so it's hovering around 80C despite not using full fan. If I raise either engine or memory clock from its current 1000/1500 state, it starts becoming very unstable. Are ASUS 290x cards that poor when it comes to churning out hashes? Or am I tuning it incorrectly somehow? Any help would be highly appreciated.

[Wipeout2097]

Perhaps you can solve your problem here: https://litecointalk.org/index.php?topic=12830.0

Please don't burden the BIOS modder. See: https://litecointalk.org/index.php?topic=15902.0

Also, read until it's clear how or if you should proceed. I'm not sure if it is ok to download a modded bios, or you are supposed to extract and submit your own, or something else. It is at one's own risk. I do not have R9-290 cards, so I didn't follow the thread.

[hostmaster]

Hi all. I've just started mining on my first mining rig. It has 3x ASUS R9 290x (so far), running BAMT 1.3. Below are my cgminer.conf settings:

Code:

"intensity" : "20",
"worksize" : "512",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "33792",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-engine" : "1000",
"gpu-fan" : "40-70",
"gpu-memclock" : "1500",
"gpu-powertune" : "20",
"temp-cutoff" : "99",
"temp-overheat" : "95",
"temp-target" : "90",
"temp-hysteresis" : "3",
"shares" : "0"

Hardware:

2x 1200w PSU (I plan to add more cards when this is resolved)
ASRock Z87 Killer
3 cards are on 16x - 16x powered risers
BIOS set all 16x lanes to Gen1
4GB RAM
Pentium G3220
3x ASUS R9 290x-4GD5

With this setup, each card is churning out an average of 800Kh/s, with approximately 5% failure rate, which is pretty sad considering that overclocked 280's can do that much. More importantly, I'm already overclocking the memory; if I run it at standard clocks, the hash rate drops to a mere 670

I've tried tuning the engine/memory clocks, lowering/raising thread-concurrency, changing worksize, but nothing seems to be working. Don't mind the fan speed - it's in a 24/7 air-conditioned room, so it's hovering around 80C despite not using full fan. If I raise either engine or memory clock from its current 1000/1500 state, it starts becoming very unstable. Are ASUS 290x cards that poor when it comes to churning out hashes? Or am I tuning it incorrectly somehow? Any help would be highly appreciated.

increse ram to 8 GB and try again

[endlessred]

Perhaps you can solve your problem here: https://litecointalk.org/index.php?topic=12830.0

Please don't burden the BIOS modder. See: https://litecointalk.org/index.php?topic=15902.0

Also, read until it's clear how or if you should proceed. I'm not sure if it is ok to download a modded bios, or you are supposed to extract and submit your own, or something else. It is at one's own risk. I do not have R9-290 cards, so I didn't follow the thread.

Thanks for the link. My 290x is a reference design, so perhaps it could be due to the memory manufacturer. I'll give the BIOS a shot.

increse ram to 8 GB and try again

Tried, zero effect.