agree blandy. and that's why we started putting a max of three cards per chassis, with one pci slot in between each card. that way the cards are not directly side-by-side and have adequate airflow. four cards is doable if you can put some kind of spacer in between them, but still not ideal.
I'm really surprised that you needed to put Accelero coolers on 5870s, especially when you had that much spacing in between them. I like your setup there though, that's pretty slick!
I could not overclock the cards at all with reference coolers on, cracking hard-ass algos like WPA/WPA2 or mscache2, they would still hit 90oC on stock clocks easy. With Accelero's on, they dont go over 66oC when clocked @ 900MHz core and 1300MHz mem. I can clock higher but keep becomes unstable after 950MHz.
That said, the bloody dust build-up on the reference coolers caused most of the over-heating issues lol
but cleaning the reference coolers is not easy, have 2 take them totally apart!
Some time passed and I got a PC!
But the speed test shows less than expected:
Quote:Hashes: 1 total, 1 unique salts, 1 unique digests
Bitmaps: 8 bits, 256 entries, 0x000000ff mask, 1024 bytes
Workload: 256 loops, 80 accel
Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger set to 80c
Device #1: Tahiti, 2048MB, 1100Mhz, 32MCU
Device #2: Tahiti, 2048MB, 1100Mhz, 32MCU
Device #3: Tahiti, 2048MB, 1100Mhz, 32MCU
Device #4: Tahiti, 2048MB, 1100Mhz, 32MCU
Device #1: Kernel ./kernels/4098/m0000_a1.Tahiti_1084.4_1084.4 (VM).kernel (322816 bytes)
Device #2: Kernel ./kernels/4098/m0000_a1.Tahiti_1084.4_1084.4 (VM).kernel (322816 bytes)
Device #3: Kernel ./kernels/4098/m0000_a1.Tahiti_1084.4_1084.4 (VM).kernel (322816 bytes)
Device #4: Kernel ./kernels/4098/m0000_a1.Tahiti_1084.4_1084.4 (VM).kernel (322816 bytes)
...
Speed.GPU.#1...: 5313.1M/s
Speed.GPU.#2...: 5329.8M/s
Speed.GPU.#3...: 5318.6M/s
Speed.GPU.#4...: 5312.8M/s
Speed.GPU.#*...: 21274.4M/s
I saw HD7970 test on another post - the speed was about 8000 M/s. Why I got 5300 on the same HD7970? Maybe I need something to adjust? Thank you.
Quote:Workload: 256 loops, 80 accel
that's what you need to adjust. if you're using lite, use "-m 0 -b --benchmark-mode 1" to test your speed. if you're using plus, use "-n 800 -u 1024" with a large keyspace.
Thank you. Tryed "-n 800 -u 1024" with another parameters (as in theme '8 x AMD HD7970 @ 1050MHz'):
-n 800 --gpu-loops 1024 -1 ?l?d?s?u --outfile-watch 0 --restore-timer 0 --runtime 10 --pw-min 8 -m 0 ffffffffffffffffffffffffffffffff ?1?1?1?1?1?1?1?1?1
Now I got:
Quote:Speed.GPU.#1...: 9733.2M/s
Speed.GPU.#2...: 9733.4M/s
Speed.GPU.#3...: 9733.5M/s
Speed.GPU.#4...: 9733.5M/s
Good result!
But now I see that I need to install additional 4 fans, because cards temperature reaches 90 degrees. I'll work on that.
that's blandyuk's rig.
the speed will not be affected using a 1x slot.
i've daisy-chained extenders and not noticed a difference in speed.
x1 will not affect speed for hashcat.
;D I'm too slow