I7 6700k vs i7 6800k with 32gb 3200mhz ram

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Cash425

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Hello. I'm building a new pc and still using my gtx 980. Currently I have a i7 3770 and 16gb 2400 ddr3 ram. Im upgrading to a i7 6700k and 32gb 3200 ddr4 ram. My question is, will my CPU benefit from the 3200mhz clock speed for gaming, or should I go with a 6800k to go along with the ram. I know 6 cores is better than 4 but I was wondering whether the i7 6700k can handle the 32gb of 3200ddr4 ram. My motherboard can support up to 3600mhz so that's not the problem. I'm not really sure how CPU and ram works together so if anyone can explain that would be great. Any help would be appreciated.
Thanks, Kyle
 
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kanewolf


I said what I meant... A 6800K has quad channel -- 4 memory channels that interface to the CPU. A 6700K has dual channel -- 2 memory channels that interface to the CPU. Although the Intel ARK doesn't quote a memory bandwidth number for the 6800K, the previous generation 5820K had 68GB/s bandwidth. The 6700K is listed as 34GB/s bandwidth.
To achieve the 68GB/s memory bandwidth you have to buy 4 DIMMs (and I HIGHLY RECOMMEND a matched set). A 6700K will work with 4 DIMMs but you won't get anymore memory bandwidth than you do with two.
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kanewolf

kanewolf

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Unless you have maxed out the 16GB you have, then 32GB won't benefit you at all. A 6800K has a quad channel memory interface and the 6700K has a dual channel interface. To optimize the 6800K you should buy a matched set of four DIMMs, the 6700K only needs two DIMMs for maximum bandwidth.
 
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Luminary

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To summarily answer your question: Either of those CPU's will be able to handle fully OC'd 3600mhz RAM modules. Higher RAM frequencies require a stronger CPU to handle the increased throughput.

"I know 6 cores is better than 4"

That is only the case if you actually USE them. It isn't uncommon for folks to think that bigger is better when building PC's, but honestly if you can spend $100 less and still get the same performance for how you use the hardware then that is the real win. Only when working on high-end video/audio editing or graphic design will the 6800k begin to really shine.

Also, just to make sure, you are aware they are two different socket types right? The 6700k is LGA 1151, and the 6800k is LGA 1151-v3. They require different kinds of motherboards to support them, so you couldn't switch them out on the same board.
 
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Cash425

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Yes I know they require different motherboards. I would have chosen a different one. To clarify, the 6700k won't be any faster or slower than the 6800k when using 32gb 3200mhz ddr4 ram correct? They both would handle it the same and there would be no difference. Is that correct?
 
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Luminary

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Yes, either of those CPU's will interface with a pair of RAM modules running at 3200 mhz in essentially the same way.

And again, similar to my point about 6 cores not always being better, unless you're using VERY memory-intensive applications the difference between RAM running at 3200 and 2400 will be hard to notice.
 
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Cash425

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I heard 6 cores is better for more ram at higher clock speeds. Is that correct at all? Is it correct that the motherboard max ram is what you look for, when deciding ram? The motherboard I went with is a asus rog hero v111 alpha
Thanks
 
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kanewolf

kanewolf

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I said what I meant... A 6800K has quad channel -- 4 memory channels that interface to the CPU. A 6700K has dual channel -- 2 memory channels that interface to the CPU. Although the Intel ARK doesn't quote a memory bandwidth number for the 6800K, the previous generation 5820K had 68GB/s bandwidth. The 6700K is listed as 34GB/s bandwidth.
To achieve the 68GB/s memory bandwidth you have to buy 4 DIMMs (and I HIGHLY RECOMMEND a matched set). A 6700K will work with 4 DIMMs but you won't get anymore memory bandwidth than you do with two.
 
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Cash425

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How do you do the calculation for ram. I have 2 sticks at 3200 32gb. So it will be using 2 dimms correct? So how do I see how many gb the ram would be using in this case if the i7 6700k has 36gb?
 
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