Does a heatsink, cpu fan, thermal paste come with a retail cpu (AMD 2500+)
or do I need to buy these items?
Do cables to connect a retail motherboard (Aopen AK79D) to various
connectors come with the motherboard or do I need to buy these items?
Is a floppy drive necessary?
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The retail box versions generally will have the extras you mentioned,
but I'd ask first to be sure. You may get a thermal pad instead of
paste, but that's ok as long as you only mount the heatsink once. If
you remove and remount it a second time, you'll need either a new pad or
paste. See directions on the Arctic Silver website.
No, a floppy drive isn't necessary. The system will work without it,
but if you go that route, be sure to install a CD-RW (not just a CD-R)
so you'll have a means of writing to a removable storage medium. You
eventually will want that at some time down the road.
Of course, floppy drives are so ridiculously cheap, I'd put one or two
in anyway, but that's just me. Practically all newer programs install
from a CD but some older ones require a floppy. And eventually a friend
will give you a floppy with something desirable on it. Your choice.