Ram for an i7-7700K

[alzuhairfayez]

I want to buy a custom pc and I read posts that said to use 2000 MHZ and some said 3000 MHZ but most did not recommend 4000 MHZ. Now I want to choose between a 3000MHZ DDR4 3000 (PC4 24000)
Timing 16-18-18-38
Cas Latency 16
Voltage 1.35V

and a 3600MHZ
DDR4 3600 (PC4 28800)
Timing 16-16-16-36
Cas Latency 16
Voltage 1.35V.

What is best, lets say i have an open budget an I have a motherboard that accepts RAM until 4100 MHZ, what is the best for my 17-7700K? (if you have extra time just explain timings)
Thanks

 

[Kasper Jorgensen]

These are some good ram. In reality Intel CPUs doesn't care much to ram speed and you wont get much improvement from faster RAM. 3600MHz ram are to expensive compared to how little benefit you will get.

PCPartPicker part list / Price breakdown by merchant

Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory ($151.88 @ OutletPC)
Total: $151.88
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-09-14 17:13 EDT-0400

 

[skitszo]

https://www.bing.com/videos/search?q=cas+latency+vs+memory+speed&qpvt=cas+latency+vs+memory+speed&view=detail&mid=3387C2DA4E26129A7EE73387C2DA4E26129A7EE7&FORM=VRDGAR

 

[Hellfire13]

Basically, a higher RAM helps in certain non gaming tasks and overclocking, where the higher frequency scales well with the task input and throughput. But after a certain point, like 3200mhz, the diminishing value of return kicks in and going overboard doesnt add much value in terms of performance.
Typically a 3000mhz to 3200mhz would add good value to the 7700k setup.

 

[lumineZ]

I would say the sweat spot is 3200MHz.
On the other side, I wonder if you would even see or feel any difference going for slower or faster ram in a day to day normal usage of the computer.

 

[Eximo]

2666 with a really low CAS latency like 13 is possible, 3000/3200 with a 14/15 CAS latency is also possible. I agree though, except on a few benchmarks you would not notice much of a difference between the various speeds in everyday use.

 

[Eximo]

The LPX 3000Mhz memory is pretty good though, I was able to tone it down to 1.3 volts to help out the CPU cooling a little.

 

[Zerk2012]

Just because your board says 4100 does not mean you can get memory that fast to work without some major tweaking and overclocking or if you could get it to that speed at all. (anything with the OC beside it means it might take some adjustments in BIOS to get it to work and be stable)
For the 7700K I have always been able to set 3K memory to just the XMP profile and have no problems I have got 3200 to work but had to increase the voltage.

 

[skitszo]

the fact that dd3 is still just as good as lots of dd4 should tell you something. lol