freezing in POST

[fat-600]

when i restart my PC sometimes when posting, it will freeze, for like 20 secs, then start up normal

ran memtest and that came back fine
reseated everything
cleared the CMOS

specs:
AN52
AMD 5200
ATI 2600 pro
500w PSU
Corsair 2GB DDR2 XMS2

any advice is welcome

 

[fat-600]

up....

 

[fat-600]

the boot set up is fine, boots from my hard drive

but you know wen it detects the ram and then the devices plugged into it, it locked up when detecting