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Upgrade to x99 now or wait...

post #1 of 23
Thread Starter 
Hello OCN, i think its finally time for me to upgrade my 2500k.
I use my 2500k to stream but it isn;t enough. Would like to get a beefier CPU.
Im kinda worried about heat output also because we have 2 computer setup in this room.
I will only be upgrading the mobo, cpu and ram. Keeping everything else, and maybe a new cooler

is x99 still worth getting over a 6700k?
Worth waiting for broadwell-e?

and my last question, is broadwell-e and skylake-e will be on the same x99 platform?
post #2 of 23
Skylake-E is not out untill much later (probley 2018) and wont be on X99 or LGA2011-3.
Broadwell-E on the other hand is on X99 LGA2011-3 and should be out in june or july.
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Seravee
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post #3 of 23
Broadwell-e is AFAIK, Skylake-E will not.

x99 over 6700k: It depends.

x264 performance gains are quite large gen to gen, more increases than some other loads. At the same clocks, a 6700k is roughly ~65% over a 2500k and a 5820k is about 1.32x faster than that still.

In practice, a 6700k average OC could be a bit lower than a 2500k when pushed (though 2500k's had far more variance) which can mean lower gains if your 2500k is at 4.8ghz+.

Otherwise, you're practically guaranteed a 4.6ghz overclock (~50% of 6700k's do 4.7ghz, ~93% do 4.6). I see from sig that you have a 2500k at 4.5ghz, so that should be easy to keep pace with

A 5820k will clock a bit lower than a 6700k as it clocks worse volt for volt and is a lot harder to cool.


At final OC's it's roughly 2500k <<<<< 6700k << 5820k for encoding perf with each "<" meaning 12.5% perf gain vs reference.

Depending on pricing, it often makes sense to go straight from a 6600k to a 5820k. The case for a 6700k is for when ST performance gains are also important to you
Edited by Cyro999 - 1/31/16 at 1:58pm
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post #4 of 23
Thread Starter 
Quote:
Originally Posted by Cyro999 View Post

Broadwell-e is AFAIK, Skylake-E will not.

x99 over 6700k: It depends.

x264 performance gains are quite large gen to gen, more increases than some other loads. At the same clocks, a 6700k is roughly ~65% over a 2500k and a 5820k is about 1.32x faster than that still.

In practice, a 6700k average OC could be a bit lower than a 2500k when pushed (though 2500k's had far more variance) which can mean lower gains if your 2500k is at 4.8ghz+.

Otherwise, you're practically guaranteed a 4.6ghz overclock (~50% of 6700k's do 4.7ghz, ~93% do 4.6). I see from sig that you have a 2500k at 4.5ghz, so that should be easy to keep pace with

A 5820k will clock a bit lower than a 6700k as it clocks worse volt for volt and is a lot harder to cool.


At final OC's it's roughly 2500k <<<<< 6700k << 5820k for encoding perf with each "<" meaning 12.5% perf gain vs reference.

Depending on pricing, it often makes sense to go straight from a 6600k to a 5820k. The case for a 6700k is for when ST performance gains are also important to you

I would benefit more with a 5820k cause of the extra cores, and I see that I can get a 5820k for $319 at microcenter and a 6700k is a little over 400.
How far can i push the 5820k with a noctua cooler? and what motherboard and ram would you recommend?
post #5 of 23
Take a look at the build in my signature.

I'm running 4.5GHz, 1.312V @ 65C (average), 75C (max, 1 core runs a little warmer than the rest) with a Swiftech H240-X on RealBench Stress Test. I would think that the NH-D15 might be a little warmer but I have never owned one. I really like the Asus Sabertooth. It's a beast. I wish that I would have chosen a different ram speed because I prefer running my system with the BCLK at 100.
Edited by shark0311 - 1/31/16 at 4:44pm
     
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post #6 of 23
Quote:
I would benefit more with a 5820k cause of the extra cores

Ye but weaker cores. That's where ~25% MT lead and 15% ST loss comes from

@shark - frequency barely changes temperatures, it's all about the core voltage that you're using. On top of that, on Haswell/Skylake CPU's there is a huge temperature difference depending on the load you use

You can have 60c video encoding @100% load on all threads, but a different type of load (avx2 synthetic) can draw twice as much power and make it run at 95c on the same overclock so it's extremely important to note core voltage and load when describing temps
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post #7 of 23
I just bought a x99 system last thursday! Parts are starting to come in but I too was planning skylake but a 5820k is $100 cheaper and better so it wouldn't have made sense to build a z170.
post #8 of 23
Good point! I updated my post.
     
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post #9 of 23
Thread Starter 
Quote:
Originally Posted by Cyro999 View Post

Ye but weaker cores. That's where ~25% MT lead and 15% ST loss comes from

@shark - frequency barely changes temperatures, it's all about the core voltage that you're using. On top of that, on Haswell/Skylake CPU's there is a huge temperature difference depending on the load you use

You can have 60c video encoding @100% load on all threads, but a different type of load (avx2 synthetic) can draw twice as much power and make it run at 95c on the same overclock so it's extremely important to note core voltage and load when describing temps

What do you mean by MT and ST?
Am i better off with 6700k @ 4.6 then?
post #10 of 23
Quote:
What do you mean by MT and ST?

Multithreaded and Singlethreaded performance

and it depends. I use a 6700k but would usually recommend 5820k if you want more MT perf than a 6600k can offer
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