There are 2 possibilities

1) Use <ban_cpu>regexp</ban_cpu> in your config.xml.
To do this, you need to find a regular expression that
matches the description strings for sandy bridge CPUs.
Description strings are of the form
GenuineIntel\tIntel(R) Core(TM)2 CPU         T7200  @ 2.00GHz [x86 Family 6 
Model 15 Stepping 6]

See http://boinc.berkeley.edu/trac/wiki/ProjectOptions#General

2) Use the "application planning" mechanism:
see http://boinc.berkeley.edu/trac/wiki/AppPlan
This requires writing a C++ "app_plan" function
that decides whether a particular host can be used.
This function can access the CPU capabilities
(a string of the form "fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat clflush dts acpi mmx fxsr sse sse2 ss htt tm pni nx vmx tm2 pbe")
as well as the above info.

-- David

On 23-Apr-2012 11:54 AM, milad nasr wrote:
> hi
> we are running a project that can not run on sandy bridge cpus i want to
> know if there is any way to solve this problem
> tnx
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