I am getting "computation errors" by the dozen after only a few seconds of run-time. (Reference computer ID 174029.) The WU report is invariably of the form:
Sieve started: 25004806000000000 <= p < 25004812000000000
Thread 0 starting
Detected 160 multiprocessors (800 SPUs) on device 0.
Computation Error: no candidates found for p=25004806000132379 between 2629725 and 3000000.
01:54:08 (1056): called boinc_finish
This is running under Windows 7 64-bit with the latest Catalyst 11.1 package.