Woo, Finally figuring out my bios mods
4 PowerColor RedDragon 4GB cards
I got them to 30 MH but they were unstable.
29.9+ is what I could get stable
2100MHz mem at 1242 Core
That's HUGE for those cards. High 25's is all I can get with my Saphire Nitros (480X 4GB) on Ubuntu 15.10.
Clocks are 1306 core, 2000 mem. Any faster on the memory and the cards die or just won't post.
You apparently got REALLY lucky with those cards.
What OS and driver version?
ETH - Total Speed: 76.827 Mh/s, Total Shares: 1, Rejected: 0, Time: 00:00
ETH: GPU0 25.297 Mh/s, GPU1 25.763 Mh/s, GPU2 25.767 Mh/s
GPU0 t=23C fan=0%, GPU1 t=53C fan=41%, GPU2 t=51C fan=41%, GPU3 t=56C fan=41%
ETH: 02/13/17-15:20:20 - SHARE FOUND - (GPU 2)
ETH: Share accepted (91 ms)!
=================== ROCm System Management Interface ===================
============================================================================
GPU[0] : Temperature: 27.0c
GPU[1] : Temperature: 62.0c
GPU[2] : Temperature: 61.0c
GPU[3] : Temperature: 66.0c
============================================================================
============================================================================
GPU[0] : PowerPlay not enabled - Cannot display clocks
GPU[1] : GPU Clock Level: 7 (1306Mhz)
GPU[1] : GPU Memory Clock Level: 1 (2000Mhz)
GPU[2] : GPU Clock Level: 7 (1306Mhz)
GPU[2] : GPU Memory Clock Level: 1 (2000Mhz)
GPU[3] : GPU Clock Level: 7 (1306Mhz)
GPU[3] : GPU Memory Clock Level: 1 (2000Mhz)
============================================================================
============================================================================
GPU[0] : Unable to determine current fan speed
GPU[1] : Fan Level: 107 (41.96)%
GPU[2] : Fan Level: 107 (41.96)%
GPU[3] : Fan Level: 107 (41.96)%
============================================================================