WinXP 32bits
Catalyst 11.5
SDK 2.4
ATI SAPHIRE 6990 @830
Memory UC @730
cgminer -o XXX:8332 -u USER -p PASS -I 7 -k phatk

695-719MHash/s

I still have like 200-300 hardware errors per minute (very low compared to the 10k errors per 1-2 seconds). Is this normal anyway? I only have hardware errors on the 2º Core.

Any possible tweaks you recommend on the flags? Are this Hardware Errors normal?

As refered on https://bitcointalk.org/index.php?topic=37040.msg459388#msg459388, I'll now try to downgrade to Catalyst 11.5, and whatever SDK and give it a shot.

[Sorry about the monologuing, but if this is usual and the answer can't be found anywhere, it might be useful for others later (if i do solve it)]

I'm starting to get desperate 

I downgraded to catalyst 11.6 and SDK 2.4, same problem. Uninstalled SDK 2.4 and installed SDK 2.1 (as most advised). And now GUIminer/cgminer (and other) don't detect my 2 cores (from ATI 6990)!!

I'm on WinXP 32bits, I have more than enough power, I didn't overclocked it and it still gives me Hardware Errors on the 2º Core.


Shoot me something, i'm running out of options!!! 

https://bitcointalk.org/index.php?action=printpage;topic=5925.0
https://bitcointalk.org/index.php?topic=21687.20

I'm not the first having this problem, i just don't get what they did to solve it =S

It is stated on various places in this forum that ironically the 11.8 works better on Windows users (not what happends on Linux).

I don't think this is an hardware problem as it does this without OC.

What openGL did you install? (provide link plz)

Currently using:
cgminer -o XXX:8332 -u XXX -p  XXX -I 7 -k phatk

Img:


What am i missing? What did you install?

I have Catalyst 11.8

i started mining more than a month ago on a 8800GTS (what i had at the moment) and after a month of trying to get a 6990, i finally got one (it is an investment, but if i decide to drop bitmining i can still use it for gaming, so that's not much of a "risk").

But now i have some problems that i didn't have with my nVidia:

1º - GUIminer doesn't show Accepted/Stales, it just stays on 0 though when i log on the pool there are some accepted!

2º (Big One) - I can't get the 2º core to mine, after 2-3 secs after starting I just get "2011-08-25 00:47:07: Listener for "ATI6990 Core 2": pool.bitp.it:8334 25/08/2011 00:47:07, Verification failed, check hardware!"

The core seems to be working on gaming and I doubt it is an hardware problem. On some thread i heard that disabling the crossfire would solve it but the Crossfire option doesn't appear on CCC, probably because Crossfire is usual for different cards.

So WTH do I do?

I'm currently mining just with the first core 350MHash/s.

3º - 6990's fan is damn noisy, i wanted to use this PC as my normal desktop and mine when I'm not on it, but the fan's noise can be heard on the whole house ^^; [keeping the 1º core at 72ºC at a 64% fan speed] I'm guessing that if i get the 2º core to work this will get even worse. Do you just keep the miners in the basement and don't care about the noise or use other solutions? (any cheap one?)