iPC start up time

I have two iPC with the specs below
Board 1 takes 15sec from iPC splash screen / hourglass to start
Board 2 takes 1min 30sec from same

Specs

Board 1 -
Hog Version 3.1.1
Memory 497MB
Ipc image 8.5.0
Front panel driver 2.0.0.8
Front Panel serial 326
Touch panel driver 03.08.46
Internal widget 395
timecode serial 1416

Board 2 -
Hog Version 3.1.1
Memory 503MB
Ipc image 8.5.0
Front panel driver 2.0.0.8
Front Panel serial 93
Touch panel driver 03.08.46
Internal widget 118
timecode serial 1144

Any ideas why there is such a difference
Both boards have had new video cards and bios battery's installed
a couple of weeks ago

regs

Kevin
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