I7 6700k or 6800k

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Cash425

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Oct 21, 2016
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I can't decide which one to get. I am a big gamer and I have a triple monitor setup with two 1080p and one 3440x1440p ultra wide. I also have a gtx 980 and will be upgrading to a gtx 1080 or 1080ti when it comes out. I normally have some chrome tabs open. Maybe YouTube running, headphone software and sometimes a mine craft server, and skype. Basically I'm looking to future proof myself with what I do. I don't want a bottleneck 1 year from now. I'm trying to get the best fps possible without lag. So which one is better?
Thanks
 
Solution
Isokolon
It's difficult.
The 6800k has 6 cores with hyperthreading with more l3 cache
The 6700k has higher clock speed

Price/performance the 6700k wins
The 6800k is just a bit too pricy for it's performance
However if we're talking about a 6850k and price isn't that big of an issue things are different.

Dx12 is optimised for 6 cores and the higher clock comes handy.

So overall it comes down to your budget.
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coastie65

coastie65

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May 26, 2010
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Hi, Personally I would go with the i7 6700k and i am actually running it. It is 4.0 Ghz out of the box and the 6800k is 3.4 ghz. Being as that is the next gen processor, there really isn't a lot of difference, so go with which one beteer suits your budget, but the 6700k is the faster of the two out of the box.
 
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coastie65

coastie65

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It will do fine. It has HT, meaning although it is listed as a Quad Core, it essentially had 8 virtual cores, which is good for multitasking. I am running it and will be for some time to come, or at least that is my plan. I usually run them until 2 generations have passed before considering an upgrade.
 
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Isokolon

Isokolon

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Jul 24, 2016
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It's difficult.
The 6800k has 6 cores with hyperthreading with more l3 cache
The 6700k has higher clock speed

Price/performance the 6700k wins
The 6800k is just a bit too pricy for it's performance
However if we're talking about a 6850k and price isn't that big of an issue things are different.

Dx12 is optimised for 6 cores and the higher clock comes handy.

So overall it comes down to your budget.
 
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Solution
coastie65

coastie65

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May 26, 2010
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Some good points and I had overlooked the fact that the 6800k was a Hexcore. DX12 maybe Optimized for 6 cores, but software is still lagging. in that respect.
 
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geofelt

geofelt

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Oct 9, 2006
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For multitasking, buy lots of ram so all tasks can be held in ram at the same time.
Very few games can make use of more than 4 threads. The I7 hyperthreads of either cpu will go largely unused in gaming.
When gaming, the performance of the single master thread is all important.
Google "Amdahl's law" for a technical explanation.
The I7-6800K at stock is 3.4, the I7-6700K is 4.0, a big difference.
Moreover, overclocking these days is simple and safe.
If there is any future proofing, it is in the ability to use a "K" chip as it was designed to do.
How well you can do is dependent on your luck in getting a good chip.
I7-6800K overclock potential.
4.2 96%
4.3 79%
4.4 44%
4.5 11%
4.6 2%
As of 5/2016
What percent can get an overclock at a somewhat sane 1.40v Vcore.

I7-6700K
4.9 2%
4.8 17%
4.7 59%
4.6 93%
4.5 100%

 
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coastie65

coastie65

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May 26, 2010
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I haven't messed with the i7 6700k I have in here. I had an i7 4770k before and had that at 4.5 Ghz. Everytime I tried to bump it to 4.6 I would blue Screen. Didn't have the cooling. I have seen 4.8 on an i7 4770k, but I'm thinking they hit the silicone lottery.
 
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4lex_Tech_

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Oct 26, 2016
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In a single core it is faster, but in a multicore performance that is how it actually works in the 6700k you get 32GHz (4.0 x 8) the 6700K is a quadcore with 4 threads (8 core in total) while the 6800K has 3.4GHz each but it gives you 40.8GHz (3.4 x 12) the 6800K is a hexacore with 6 cores and 6 threads (12 in total). The 6700K is going to be Ok just for gaming but if you want multi task is better a hexacore becasue normally games requires between 4 to 6 cores just for games an background activities can use up to two cores. Even though its more expensive the MoBos and the CPU is totally worth it, plus if you can afforded you can get up to 128GBs of ram with the 6800K


 
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Isokolon

Isokolon

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Jul 24, 2016
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- for a gaming setup 128GB RAM is just unnecessary. one doesn't fill 16GB RAM up when gaming yet.
- this is not how multicore performance works. 8x4GHz still is 4GHz per thread. I mean yes, you have a higher CPU output total. but singlethread performance is far more important for gaming. if the mainthread(s) are lower clocked you're not gonna get higher fps no matter if you got 4, 8 or 20 cores. so for gaming a 6700k is usually better, depending on the game though.
 
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geofelt

geofelt

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You do not get 4 ghz x 8 threads with a I7. Hyperthreads use resources that are unused by the main core.
It probably works out to 4 full 4ghz threads and 4 2ghz threads, assuming that all 8 threads are fully loaded and that the underlying apps are not trying to use the same resources that are shared.

Then, there is "Amdahl's law" which explains why a many threaded app is ultimately limited by the speed of the main task
A technical explanation:
https://en.wikipedia.org/wiki/Amdahl%27s_law

The effectiveness of DX12 has some limitations.
1. A game must be coded to use it. A few are out but, not that many.
2. It requires windows10.
3. It makes the graphics driver path multitasked.
4. It is more helpful to those with slow cores like AMD.
5. Game developers do not want to make games that restrict their market by requiring DX12 for good performance.

 
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