Been having this issue since yesterday on my watercooled 9800GX2. Had to drop the clocks back down to stock and I am still getting the "UNSTABLE_MACHINE" error.
[12:21:02] Project: 5911 (Run 1, Clone 704, Gen 2)
[12:21:02]
[12:21:02] Assembly optimizations on if available.
[12:21:02] Entering M.D.
[12:21:08] Tpr hash work/wudata_03.tpr: 3576902555 847168113 1794523776 1949302015 3481496150
[12:21:08] Working on Protein
[12:21:08] SEH code: 3221225477
[12:21:08] Run: exception thrown during GuardedRun
[12:21:08] Run: exception thrown in GuardedRun -- Gromacs cannot continue further.
[12:21:08] Going to send back what have done -- stepsTotalG=0
[12:21:08] Work fraction=0.0000 steps=0.
[12:21:12] logfile size=0 infoLength=0 edr=0 trr=23
[12:21:12] - Writing 635 bytes of core data to disk...
[12:21:12] Done: 123 -> 124 (compressed to 100.8 percent)
[12:21:12] ... Done.
[12:21:13]
[12:21:13] Folding@home Core Shutdown: UNSTABLE_MACHINE
[12:21:16] CoreStatus = 7A (122)
[12:21:16] Sending work to server
[12:21:16] Project: 5911 (Run 1, Clone 704, Gen 2)
[12:30:23] Project: 5913 (Run 6, Clone 228, Gen 0)
[12:30:23]
[12:30:23] Assembly optimizations on if available.
[12:30:23] Entering M.D.
[12:30:29] Tpr hash work/wudata_08.tpr: 3371264563 2950071047 1392310519 2514424236 1881856611
[12:30:30] Working on Protein
[12:30:30] SEH code: 3221225477
[12:30:30] Run: exception thrown during GuardedRun
[12:30:30] Run: exception thrown in GuardedRun -- Gromacs cannot continue further.
[12:30:30] Going to send back what have done -- stepsTotalG=0
[12:30:30] Work fraction=0.0000 steps=0.
[12:30:34] logfile size=0 infoLength=0 edr=0 trr=23
[12:30:34] - Writing 635 bytes of core data to disk...
[12:30:34] Done: 123 -> 124 (compressed to 100.8 percent)
[12:30:34] ... Done.
[12:30:34]
[12:30:34] Folding@home Core Shutdown: UNSTABLE_MACHINE
[12:30:38] CoreStatus = 7A (122)
[12:30:38] Sending work to server
[12:30:38] Project: 5913 (Run 6, Clone 228, Gen 0)
Multiple WU 5911 and 5913
Moderators: Site Moderators, FAHC Science Team