Processor speed after Standby Mode

I have the T400 with Windows XP (32bit). Dual P8600 2.4GHz processors & 3GB memory. Fairly new computer so there is plenty of space.
I run a macro out of Excel every day. When I run the program it takes about 15 to 20 mins and Excel struggles to move. This is normal with this laptop and it is annoying. I found that there have been times when the program runs fast as it should - fast as in 4 minutes. Processing speed is clearly faster but all programs are the same. I have also come to realize today that it runs faster after it comes out of Standby Mode. If I shut down and then re-start the computer and then run the program out of Excel it takes 20 minutes. If I start up, then go to standby then come out and run the program it runs in 4 minutes.
What would cause this? Is there some background process that stops after Standby that would allow the processors to perform as they should?
Thanks

is your CPU throttling down. Download HWinfo32 and check the cpu speed when the excel is running slow (the 20 minutes).
also are you running the laptop with the battery inserted? and do you have the latest thinkvantage power manager installed? what version of the bios firmware are you running?
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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