I find it odd that there is no mention of the fact that EUR withdrawals are not yet possible. Support ticket was answered with:

"The withdraw functionnality is about to be deployed very soon. You will be notified as soon as it becomes available. Thanks very much for your patience."

I would have preferred to know this in advance, and not find out about it by trying to withdraw.

Unless we also find the next one....

1 for me.

Und was willst du da tauschen? Bitcoin gegen Bitcoin?

Don't they have 2 connectors each? A total of 8? I don't think there is a affordable PSU with 8 PCIe-power connectors.

I am extremely satisfied with the Sharkoon Rush Power series: they have 4 connectors, so with 2 (500W version for enough power on 12V rails) of them you will have no problem powering your rig. http://www.sharkoon.com/?q=en/content/rush-power-m

XFX 5870 stock voltage
960/320 core/ram
430 MH/s

phoenix poclbm on Linux with 2.1 SDK

I would suggest experimenting with the ram speed, I found ram = 1/3 core working best for me, ymmv.

I also have 2 XFX 6950s which are showing weird behavior, although it is consistent between the two cards. Ram speed is also key to speed on these cards. After a lot of experiments I settled for 840/230 which produces 352 MH/s each. Increasing ram speed decreases performance (oddly enough), and increasing core speed does *not* increase performance (even more strange).

Also they do not allow me to change ram speed on the fly *at all*. For each change in ram speed I needed to re-flash the cards.

During the experiments I also noticed that contrary to my other cards the XFX 6950s will not lock up the system if they get to hot. They will pause for a moment, then restart. (I would not recommend running them like that, it happens at like 102°C)

I found that some cards will just not let you do this without flashing a new BIOS. I have build 3 rigs (2x5870, 2x6870, 2x6950), and while I can set clocks on the (XFX) 5870s, I could not on the (Gigabyte) 6870s and the (XFX) 6950s. For editing the BIOS and reflashing your cards search for RBE (Radeon BIOS Editor).

Goal:
Being able to underclock the memory and overclock the core in a way, which allows me to change frequencies from a script. Preferrably directly with the aticonfig tool, but another command line solution is also OK.

System:
2x XFX HD5870
Debian Linux 6.0

Current state:
phoenix 1.48 is running fine with 380 Mhashes/s for each card with clocks 900core 1200mem
ATI Overdrive is enabled, the aticonfig tool restricts me in ranges [600-900] [1200-1300] for core and memory respectively.
Cards are currently flashed with an ASUS BIOS which reportedly should have allowed me to do what I want, but doesn't.

Already tried:
Using AMDOverdriveCtrl - The tools runs just fine, does nothing. A warning message in the console seems to tell me that this card does not support power states?
Flashing an ASUS image (see above) - Other than a changed fan characteristic curve (card is not as loud anymore - but hotter), no changes visible.



For a working solution I have no reservations doing any or all of the following:
flashing another bios on the cards
putting the cards into a windows (7 64bit) computer to do some setup or whatever
reinstalling linux, even another distribution, if you can convince me, that Debian is the problem here (don't know why it should be...)

I will be away from my rig until next monday, but I will have a look at this thread from time to time to comment on any questions. I also have remote access, so I can try anything which does not require physical presence


Your help is greatly appreciated.