Bitcoin Forum

Hi,

I haven't updated my drivers since may - I have ATi 11.5 drivers and v2.3 ATi Stream SDK, there's the CPU bug and I need to use dummy plugs because I run my miners on Win7_64 Pro.

From which driver version there's no more need for dummy plugs?

Which versions don't have the CPU bug?

Which version is the fastest and most stable (=what also matters is not necessarily the total hashing power but the number of shares - sometimes O/C (even if the GPU doesn't hang or render stales) may even decrease the number of submitted shares despite the increase of total hashing power)?

Get the latest ATI driver.  It doesn't have the CPU spinlock bug with multiple GPUs.  The new Stream SDK is slower with some cards though.  After installing the driver, revert back to the 2.5 SDK (or manually copy the DLLs to System32/SysWOW64 as described in this thread)

https://bitcointalk.org/index.php?topic=54693.msg651989#msg651989 (https://bitcointalk.org/index.php?topic=54693.msg651989#msg651989)

Bullshit.

Ah.  I'm only running 43 Ghash worth of cards.  What would I know?

What about Linux ?

Has the CPU bug been fixed on 11.6 running multiple GPUs ?

Depends on what OS you're running as well as SDK. Need more information. Many of us, including myself, have yet to find a sdk + driver + miner combo that doesn't cpu bug on windows under a multi-gpu config.

The OP specified his/her(lol) operating system and I responded appropriately.  11.12 with APP SDK 2.5 is the "golden combo" right now under Win7_64 unless it is a dedicated rig with 5000 or 7000 series cards.

I wasn't refering to OP. I was refering to the guy with 43 ghash.
Also, I just "upgraded" to the golden combo you mentioned, still cpu bugs, 4 5xxx gpu's, 11.12, app sdk 2.5 (OpenCL 1.1 AMD-APP-SDK-v2.5 (793.1) FULL_PROFILE in GPU caps viewer), win7 x64, phoenix 1.7.4, phatk2 2.2, VECTORS, AGGRESSION=14 (or 12 for sdk 2.1). was using exact same setup except was using 11.11. in any case, yeah, still cpu bug

If you have installed 11.12 (or 12.1 driver), start its setup (i.e. c:\ATI\Support\11-12_vista64_win7_64_dd_ccc_ocl\setup.exe )
Then uninstall Ati Stream (AMD APP SDK) only and install:
for 64-bit Vista/Windows 7:  http://www2.ati.com/drivers/11-2_vista_win7_64_ocl.exe
for 32-bit Vista/Windows 7:  http://www2.ati.com/drivers/11-2_vista_win7_32_ocl.exe
for 64-bit XP: http://www2.ati.com/drivers/11-2_xp64_ocl.exe
for 32-bit XP: http://www2.ati.com/drivers/11-2_xp32_ocl.exe

You will have previous mining performance and no 100% CPU Bug!

Dunno what version stream that is (11.2 doesnt tell me anything, need 2.1, 2.4, or 2.5). But in related news, while 11.12 + 2.5 for me wasn't the "golden combo", I did go ahead and try 11.12 + 2.1, and lo and behold no cpu bug with 4 x 5xxx cards as well as 99% gpu activity.

Before       ||||||        After
463.0 (1000core/5870) 462.7
463.4 (1000core/5870) 462.7
324.5 (1000core/5830) 324.8
330.9 (1025core/5830) 332.9
2.5 sdk                    2.1 sdk
1581.4 mhash | 1583.1 mhash

Had to reboot after testing to install a replacement fan, so values differ slightly in picture.

All GPU's @ 330 memory running Phoenix 1.7.4 with GUIMiner frontend, phatk 2.2 kernel with arguments VECTORS AGGRESSION=12 (BFI_INT and WORKSIZE=256 are applied automatically) with 11.12 drivers and 2.5 + 2.1 SDK (but I specify the miners to only use 2.1 SDK) under Windows 7 x64 Ultimate. Also managed to force my athlon II X2 250 (3.0GHz) to always run at 800MHz with something like 0.950v (or 1.050v, not sure which it defaults to) by going to Control Panel -> Power Options -> Change Plan Settings -> Change Advanced Power Settings -> Minimum and Maximum Processor State -> 5%.
http://dl.dropbox.com/u/9768004/nocpubug.png

I've inspected c:\ATI\Support\11-2_vista_win7_64_ocl\ATIStreamSDK_dev.msi file with MSI Viewer and it looks like SDK v. 2.3

http://img714.imageshack.us/img714/3223/atistreamsdk.gif

What OS do you use?

Windows 7 64-bit.

And multi-gpu setup?

http://img841.imageshack.us/img841/5366/p1320345i.jpg (http://imageshack.us/photo/my-images/841/p1320345i.jpg/)

3 x 5830, C2D E6600

 Ok, tried 11.12/2.3 and infamous bug is still there. No idea wtf is wrong with this shitty Win7, I have no bug with XP (32 or 64 bit) and proper drivers. But with any driver/sdk combination I'm trying on Win7x64 I still have it. This os is cursed.

The CPU bug isn't in the driver -- it's in the APP SDK.  Try 2.5...

Tried already.

Uninstall all ATI drivers and use  Driver Sweeper in safe mode (http://www.guru3d.com/category/driversweeper/) to clean the remains of your previous tests, which may prevent correct installation from MSI file (i.e. newer versions of OpenCL drivers).
You can also search for these files manually in Windows directory.

Then install 11.12 without SDK, and then SDK  11.2. For me it works fine on two PCs.

And what miner do you use?
I use Phoenix Miner with phatk kernel with .bat script like this (copy this command in script n times, where n is number of cards):

Dude! Thanks alot! Problem was in AGGRESSION=12! Changed it to 8 and bug disappeared! But I'm getting lower mhash/s now and gpu load is 98% at max. So it seems that bug triggers when gpu usage hits 100%, with AGGRESSION=9 and higher. So it looks like it's just a workaround, not a real fix for the issue.

  Finally, killed that bug with 11.12/2.1 combo. Zero cpu usage with AGGRESSION=12! Thanks to ssateneth and his thread.
https://bitcointalk.org/index.php?topic=61340.0

I hesitate to use 2.1 SDK, because I want to use the computer during mining.
I've noticed that the CPU usage increases gradually with miner agression:
0% of single core usage at Aggression 8; 268 MHash/s
0% at Aggression 9, but screen updates became laggy
12% at Aggression 10;
50% at Aggression 11
80% at Aggression 12
90% at Aggression 13; 273 MHash/s

Why you can't use it during mining with 2.1? Have no problems here, even playing in Skyrim without losing mhashes. I use internal 4250 to offload 5770 tho.