My card's highest possible mhash with 2.4-2.5 are at 1060/366Mhz with Phoenix 1.7.2 (exe) phatk2 VECTORS AGGRESSION=13 FASTLOOP=False WORKSIZE=256. The odd 366MHz optimal RAM speed differs on 6xxx, 5850, and 57xx, where 300MHz is where the peak performance is usually found.
Lets see what we find, I was curious what Diapolo's new 2011-12-21 kernel could do, so lots of Phoenix 1.7.2 benchmarks with different kernels, worksize, and RAM speeds (the scaling is similar to standard phatk2), tests were ran for several minutes and shares (unless the setting was obviously poor), with the -a averaging option:
SDK 2.6/11.12 (12.1 is identical)worksize: | | | 256 | 128 | 64 |
Diapolo | VECTORS2 | 366MHz | 332.99 | 327.86 | 321.16 |
Diapolo | VECTORS2 | 1000MHz | 326.03 | 327.90 | 325.99 |
Diapolo | VECTORS4 | 366MHz | 219 | 298 | 329.74 |
Diapolo | VECTORS4 | 1000MHz | 255 | 278 | 216 |
phatk2 | VECTORS | 366MHz | 307.37 | 306.78 | 297.25 |
phatk2 | VECTORS | 1000MHz | 300.87 | 304.61 | 298.81 |
phatk2 | VECTORS4 | 366MHz | 217.42 | 289.25 | 288.78 |
phatk2 | VECTORS4 | 1000MHz | 262.69 | 339.5 | 340.21 |
phatk | VECTORS | 366MHz | 326 | 323.5 | 315.3 |
phatk | VECTORS | 1000MHz | 317 | 321.2 | 320.5 |
5830, SDK 2.6 (10.0.851.6)
Diapolo from December 12th, 2011
1060 core, 385 memory (phoenix 1.7.2)
phoenix -k phatk device=1 AGGRESSION=11 fastloop=false VECTORS4 WORKSIZE=64 -a 1000
332.96
395 raises it another point or so. Never tried 399.
Not going to run my card at 1060 core and 1000 memory setting. I imagine the ~2% gain you have listed here is more than offset by energy costs associated w/ cooling (and wear and tear on the card, theoretically resulting in faster depreciation of the value of the equipment)
I usually run it at 1000/385.
(ed: for comparison, back in June or so when I put my score on the 'Mining Hardware comparison' wiki page, I got 334, with 1030 core and 385 memory... but it's worth it for a multi-card setup, anyway... don't have that core getting smashed 100% anymore)
(ed2: same thing at 399 memory setting - [335.09 Mhash/sec] [18 Accepted] [0 Rejected] [RPC (+LP)])