IT Tips – Is SP1 for Windows 7 Going to Slow Down my Machine?

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ANSYS R13 Lemans CPU Wall Clock Benchmark Results Before and After a Windows 7 64-bit SP1 Update

I was curious what sort of impact the Windows 7 SP1 upgrade would have on a new install of ANSYS R13. Would the Service Pack upgrade have a positive or negative impact on the ANSYS R13 and additionally the Lemans benchmarks?  Here is what we found:

  • Hardware test machine: Single socket 6 core AMD C32 running 2.6GHz, 8GB of RAM, 2 x 160GB Intel SSD drives in RAID0, Windows 7 Professional
  • Benchmarks completed by Clinton Smith, Consulting Mechanical Engineer CFD and Thermal Analysis at PADT, Inc.

Results:

  • The benchmark results appear approximately the same before and after the install of the Service Pack.
  • No apparent issues or crashes with ANSYS R13 after installing the Windows 7 Service Pack 1 update
  • Six core benchmarks and one core benchmarks are slightly faster after SP1 upgrade.
  • Four core and two core benchmarks are slightly slower after SP1 upgrade:

ANSYS Le Mans Model, 1,864,025 Nodes

Cores

Wall Time (s)
Pre SP1

Wall Time (s)
With SP1

Diff

% Diff

1

7,220

7,190

-30

-0.4%

2

3,970

3,980

10

0.3%

4

2,300

2,320

20

0.9%

6

1,850

1,840

10

-0.5%

Conclusion:

It appears that overall the impact of the upgrade is a positive. No system stability or ANSYS R13 issues related to the upgrade.

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