only if he buys a 2nd hand 2600k would it be cheaper for him to upgrade to thathttp://forums.overclockers.co.uk/showpost.php?p=25212426&postcount=1
2600K at just 3.40GHz and matches FX8350 at 4.00GHz in BF4.
2600K: Far superior single-threaded performance/better performance clock for clock, with bigger overclocking headroom and will hit similar max frequency as the FX8 on overclock, cheaper and less hassle to upgrade.
"Thinking of switching from Intel to AMD" Answer: NO
/thread