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hay guys im having a few issues.

installing stream 2.3 gives me ~220mhs on my 5850's im hearing they should be ~250mhs

ive installed the sdk 2.2 but my preformance drops to like 3mhs on all 3 of my machines.

and 2.1 does nothing,
Poclbm doesent even hash

thoughts?

thanks.

oo im running windows 7 x64

nothin?

I have this same issue with Win 7 64b and Ati Stream 2.2 with the poclbm miner and it drops down real low too. Not everyone reports this problem but I have the same issue with khash dropping down to basically nothing on a 5970 with the Stream 2.2 (2.3 works fine, but it's supposedly slower than its supposed to be as you mention)

Anyone else run into this?

As I've said in the DiabloMiner thread repeatedly, with 5xxx, use 10.10 or 10.11 with 2.1. All other combinations are inferior.

After installing 2.2, the device numbers got switched for me. Try running Poclbm without any arguments to determine which device you're using, the 3mhs sounds like your CPU became device 0. If that's the case, switch to the other device(s).

anyone know how to downgrade from sdk 2.3?  2.1 and 2.2 are not working for me.  I noticed when I uninstalled 2.3 and installed 2.1 GPU CAPS viewer said 2.3 was the current version, which makes me think the problem is that it is not uninstalling completely.

Yeah I can't switch from 2.3 to 2.1, neither of my cards will even hash.

We need someone to install sdk 2.3 on a windows 7 rig while monitoring with an uninstall manager, then uninstall and use the manager to see what is getting left on the drive so we can delete it and get a clean 2.1 install.

sethsethseth, I've also had problems with ATI CCC when upgrading and downgrading. I'm not sure this is relevant for your but you could try to do as explained in this page : http://www.rage3d.com/board/showthread.php?t=33862974 .
Here is the interesting part :
"This is an old thread, but it's one of the top search results for "ccc won't run" so I wanted to post another possible solution here. My solution was to clear out the Windows GAC (Global Assembly Cache). In Windows 7, you can browse directly to "C:\Windows\assembly". Sort by "Public Key Token", then delete everything with the Token "90ba9c70f846762e" (ATI's key). You'll obviously need Administrator privileges. No reboot needed either. Reinstalled CCC and it ran perfectly!

The GAC lets you share DLL's that are the same version number. If it's in the GAC, any installer will NOT install a new DLL - it'll use the one in the GAC. If the GAC DLL is corrupted, you're majorly SOL.

When I reinstalled the CCC, it took longer to install then it had before. Presumably, this was due to the installer copying all the correct DLL's to my hard drive. And no ATI DLL's have made it back into my GAC.

To give credit to the original poster, here's the page I found this fix on:

http://www.hardwareheaven.com/mobili...ol-center.html "

What parts of the sdk are necessary to run the miner?  Art thought it was just only the -dev .msi can anyone verify this?

we really need someone to get this done.  tons of people in the irc channels have trouble with 2.3 and we can't downgrade.  my roommates computer is passworded or I would do it on his:)

Have you tried following the instructions in the installation notes?

• Uninstall any prior ATI Stream SDK you have on your system. To do this:
a. Reboot.
b. Use Programs and Features (Windows Vista or 7) or Add/Remove Programs (Windows XP) to uninstall the prior SDK files.
c. Manually remove any ATI Stream directories under My Documents and under Program Files or Program Files (x86).
d. Search for, and remove, all atiocl* files on the system.

• If a pre-lease version of SDK 2.3 is on your system, follow the uninstall directions above; then, ensure that the previously generated temporary folder is also deleted. Paths to this folder are:
XP 32-bit: C:\ATI\SUPPORT\streamsdk_2-3_xp32
XP 64-bit: C:\ATI\SUPPORT\streamsdk_2-3_xp64
Vista and Win7 32-bit: C:\ATI\SUPPORT\streamsdk_2-3_win732
Vista and Win7 64-bit: C:\ATI\SUPPORT\streamsdk_2-3_win764

thanks so much grinder, your instructions work for removing 2.3 completely.  Now my problem is that I can get 2.2 to run, but not 2.1 without getting this error:

File "poclbm.py", line 3, in <module>
File "pyopencl\_init_.pyc", line 3, in <module>
File "pyopencl\cl.pyc", line 12, in <module>
File "pyopencl\_cl.pyc", line 10, in_load
ImportError: DLL load failed: The specified module could not be found

and the gui miner says "no opencl devices found" even though GPUcaps viewer runs the opencl demo.

I've tried this on 11.1 and 10.11 display drivers and my rig has two 5970's.

Also, it's only necessary to install the -dev part of the sdk package.

I get the same error when trying to downgrade from 2.2 to 2.1.

Uninstall all ATI software, including Drivers, use
http://www.guru3d.com/category/driversweeper/
To completely clear out your ati drivers.

Then install 10.11 or 11.2, it doesn't matter which, and reboot.

When you have rebooted, install Stream SDK 2.1

http://download2-developer.amd.com/amd/Stream20GA/ati-stream-sdk-v2.1-vista-win7-64.exe

Once that is installed, reboot again, and use http://bitcoinpool.com/poclbm-mod.zip

As your miner.

I'm currently getting 315 mh/s at 815 core clock on my 5970, so I'd expect great things from a 5870

I switched from SDK 2.2 to 2.1 with 10.11 and the difference with my 5870 is small. It went from 312 MH/s to 315.

Seems BTCPool operators didn't like other people using their modified miner for hashing on any other pool, it now no longer works.

In my opinion, that just makes them look childish.

I agree, very childish, so much so that I quit their pool.