Will SD Card Readyboost work in X40?

[coleridge]

Just got a IBM Thinkpad X40, 1.2 Pent M, 1.5gb RAM, original 60gb HD. I installed Windows 7 Home Premium on it, and got it to recognize the Intel Extreme Graphics 2 for Mobile, so that is good. Everything runs well.

I was wondering if I should pursue the Windows 7 Readyboost feature to help speed up the X40. It would be nice to use the SD card slot as a Readyboost drive. I put a 8gb Kingston Class 4 SDHC in it, selected use as Readyboost, but it said its performance was not good enough.

Has anyone had any experience using this feature on a older laptop like a X40 and does it offer any noteworthy performance enhancements, or any negatives (power draw, etc.)?

thanks for the help

[lukee]

I would try Pretec SD Cheetah 4GB (non-SDHC) with speed 133x.

[sjthinkpader]

I am using a Panasonic Class 10 card.

[coleridge]

ok, found an old one that worked, a 4gb sandisk. The x40 performance did improve significantly, but the CPU load hovered around 30% at all time, reducing battery life significantly as well. I am using this mainly unplugged and mobile, so I think that I will not use the readyboost feature. Too bad.