Corsair Vengeance 2400 CL14 cs 3000 CL15 with Skylake i3

Feanor_ · Jul 20, 2016

I'm ordering a Skylake i3 system. I'm not particularly interested in overclocking, and I anyway understand Skylake can't really be properly overclocked. I'm anyway a bit confused having read about faster memory effectively overclocking a system, seemingly without changing settings?

(So you know how to pitch any replies my background knowledge is good and technical, just a bit out of date in some areas - this is replacing my 9 year old Core2 Duo system, back when any overclocking or usage of faster memory involved, I believe, increasing the FSB speed else there was, I thought, no benefit in faster memory.)

So, on a Skylake i3:

1. Is there any point in getting the faster memory? Or is lower latency better?
2. Would I benefit from the faster memory without changing motherboard settings? If I'd need to change settings, which ones?

Many thanks in advance!

smorizio · Jul 20, 2016

first off the intel default memory controller is 2100 at 1.25v. most of the newer mb will take 2400 and 3000 ram if it 1.25v fine. in the bios you turn on xmp profile. the mb will set the ram to cpu timing. on older ddr2 ram 1600 speed (800 bus). was standard. ddr4 1100 bus is stock. 2400 is 1200. 3000 is 1500. what you have to look for is cost. is the slightly faster ram the same price or cheaper and a known good brand.

Tradesman1 · Jul 20, 2016

I'd go the 2400, chances are good that the 6100 won't even be able to carry 3000 (at least at 3000), even many of the higher end CPUs ('K' models need an OC on them to carry 2800-3000 and higher

Feanor_ · Jul 21, 2016

Thanks both. I'm still a bit confused but have bitten the bullet and gone for the 3000MHz memory. The thing is that all the 2400Mhz memory was out of stock for 1-4 weeks so for the sake of a few quid I decided to go for the 3000Mhz stuff, especially if there's a chance it might mean I can run the system a bit faster.

Tradesman1 · Jul 21, 2016

If any problems let us know and we can manually set the sticks up to a lower speed

Feanor_ · Jul 24, 2016

Thanks Tradesman. Can you explain, or link me to an explanation about, the relationship between memory speed and system/CPU speed these days? It sounds like the system recognises the speed of the memory and runs it accordingly, which I don't think it did in the past when FSB overclocks were needed. Does this automatic speed recognition create an automatic overclock for the rest of the system / the CPU? Is this why it'd be necessary to manually throttle the memory speed because the CPU is OC locked? Or am I getting completely the wrong end of the stick?

I realise I wasn't clear before, I'm getting a Z170 chipset motherboard (Asus Extreme4 Skylake) in case that makes a difference. I've also got quite a lot of experience fiddling with BIOS settings in older computers when they were a lot more obscure & hard to work with than these days.

Tradesman1 · Jul 24, 2016

In the older rigs the MC (memory controller was on the mobo and it was a simple matter to OC the mobo through the FSB to get higher memory speeds running nicely. Now it's in the CPU and with a non-K and not having the ability to OC the memory controller directly what it can handle is more limited. I touch on this in an article I wrote for Tom's, Fiction, item 4

http://www.tomshardware.com/reviews/ddr-dram-myths,4155.html#p1

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Corsair Vengeance 2400 CL14 cs 3000 CL15 with Skylake i3

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