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Currently the 6800k should be better for gaming, the 5820k better for video encoding.
I was saving for a 5820k system but ended up buying the 6800k this week instead. Reasons being that the motherboards and chips saved me about £100 and 16gig ram sticks dropped enough in price that only having 4 slots vs 8 didn't really matter any more.
Going forward though I suspect more cores will make more of a difference in more things but I'll just upgrade again in the future if I feel I need it and save £100 now.
Don't think overall there is much performance difference between them and both are very capable chips.
which is a good choice for gaming/video rendering?
5820k if decent will oc a little higher.in general.
gregster did a benchmark on firestrike i think it was and his scored 1200 at 4.4 . my 5820k at 4.6 scores 1326.
so not too much in it.
He got 1213 in Cinebench R15, but my 5820K @ 4.5GHz got 1277 so doesn't look like there's any point in getting BW-E over HW-E especially as HW-E is a good bit cheaper. Glad I went with the 5820K over the 6800K - the Tom's Hardware review put me right off.
5820k is the best option here for sure. So much more bang for buck. The BW E equivalent not clocking as high core and way off in cache.
Can you decouple it?