In my experience with no training at all, about 15/20 that because i broke like 10 sticks of ram on my first build ever...
Spent like 300$ alone on the ram...
But it all comes with manuals, the mobo manual has almost all the info for the construction, you just need time and be calm, caz i get easily ****ed when my stuff backfires on me.
If you need help putting it together then ask around...
Casual (AMD 4000+ x4) (Stock mobo) (750 Gig + 8 TB Xternal) (150 RAPTOR) (9800GT OC x2)
(OCZ PowerStream 800 Watt) (2G OCZ) (XP/Vista)
Torrenter (1.05GHZ) (Stock mobo) (250GiG) (9200 Radion) (Stock PSU) (768MB) (XP)
Laptop (Intel Core 2 Duo @ 2.8Ghz) (2G) (8600GT) (XP/Vista) (500GiG)