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i5 6400 worth it? - Page 4

post #31 of 35
Quote:
Originally Posted by KarathKasun View Post

i5-2400 and i5-6400 perform near identically. Intel has been moving clocks downward for the same performance label, for example i5-2400 @ 3.1 and i5-6400 @ 2.7. This means upgrading to the exact same performance rank CPU from one gen to the next will get you nothing, save for power consumption.
thats if you ignore every other additional benefits from skylake, FMA3, AVX2 (3 if xeon), TSX, etc.
theres also the improvements on the front-end, faster cache, and better IMC.
you still get PCI-e 3.0 and M.2 from the platform, plus better IGP and DDR4 support if that matters.
and theres this vague feature as well, they hadn't mentioned whether desktop SKUs also has this - http://www.anandtech.com/show/9751/examining-intel-skylake-speed-shift-more-responsive-processors

this is why skylake could even out-perform sandy bridge by more than 30% on certain tasks.



and on the other hand, a certain exploit about BLCK overclocking for non-K is starting to take root in skylake platforms.
Edited by epic1337 - 12/22/15 at 11:05am
post #32 of 35
At stock speed the difference in clock speed eats up those advantages. 2.7 -> 3.1 is a ~13% difference. Skylake i5-6400 would then be slower than the SB i5-2400 in some tasks. Take 13% off of the other comparisons and you are more correct as they are not clocked the same.

Im sure the overclocking will be patched out (at the silicon level) at one point or another, its not like Intel to give away something like overclocking.
Edited by KarathKasun - 12/22/15 at 11:08am
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post #33 of 35
Thread Starter 
i ended up going with a z97 + i5 4460 combo. z97 is cheaper than h97 in the UK (ATX form) from what i could find and i couldn't trust a h81 since i cba with having to bios update if i get old stock. as for the i5 6400... just wasn't worth it in the end.
post #34 of 35
As this thread is pretty old, this answer comes too late for you. But for all people now reading this thread until this very late page: DONT buy the 6400 for DayZ SA. Its a great CPU but DayZ is ****ty optimized and profits a LOT of a very high cpu clock. I had my best fps with an fx 8320 with 4 of the semi cores turned off to make it a real 4 core and oced it to 5.2 GHz. With my new 4690k at 4.6 GHz fps are also very ok (for DayZ standards) but not as high as with my old 5.2 GHz FX 8320.
Edited by freestylerof911 - 7/8/16 at 2:26am
post #35 of 35
Quote:
Originally Posted by freestylerof911 View Post

As this thread is pretty old, this answer comes too late for you. But for all people now reading this thread until this very late page: DONT buy the 6400 for DayZ SA. Its a great CPU but DayZ is ****ty optimized and profits a LOT of a very high cpu clock. I had my best fps with an fx 8320 with 4 of the semi cores turned off to make it a real 4 core and oced it to 5.2 GHz. With my new 4690k at 4.6 GHz fps are also very ok (for DayZ standards) but not as high as with my old 5.2 GHz FX 8320.

its not clockspeed, but pure performance per core.

you can gain the same amount of performance per core even if clockspeed is low if your CPU's IPC is high.
e.g. a skylake i5 @ 4Ghz will perform better than a piledriver @ 5Ghz on DayZ.
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