Use 1866mhz ram with i5 4670k?

zoog18 · Jun 6, 2014

Hello, I have an i5 4670k CPU and wish to use 1866 mhz ram, how do I do this (if possible) without overclocking the CPU and how do I do it in general. I have an ASrock extreme3 z87.

Entomber · Jun 6, 2014

Open your BIOS (F9 on boot - Windows 7), and under the "OC Tweaker" tab you should have an option to activate the XMP Profile for your RAM once it's plugged in. You do NOT need to overclock your CPU for this, although it seems strange that you would buy an overclockable CPU and not overclock it..

spooky2th · Jun 6, 2014

The 1866MHz memory will be recognized at the MB's default. Probably 1333MHz. Maybe 1600Mhz. You will have to OC it to 1866MHz. Enable XMP, profile1 and set the speed at 1866MHz if it is not already set there and the BIOS should do the rest for the timings & voltage. If not set them up manually too.

zoog18 · Jun 6, 2014

Does this still apply even if the rams default speed is 1866? And it won't cause any heating problems?

spooky2th · Jun 6, 2014

Yes, it does apply and there won't be a heat problem unless you actually OC the memory past 1866MHz and then probably not.

This is from the Asrock MB web site:
Supports DDR3 2933+(OC)/2800(OC)/2400(OC)/2133(OC)/1866(OC)/1600/1333/1066 non-ECC, un-buffered memory

See the (OC) besides the 1866? Means you will have to OC the memory to the advertised speed. This is normal. The memory will probably default to the 1600MHz that is listed as non-OC speed.

Your MB specs:
http://www.asrock.com/mb/Intel/Z87%20Extreme3/?cat=Specifications

Tradesman1 · Jun 6, 2014

You're not OCing the DRAM, that is what it's speced to, the (OC) simply means than an OC of the MC (memory controller) and/or CPU may be required....most all 4670Ks can easily handle 1866 at stock

zoog18 · Jun 6, 2014

How come its listed as 1600mhz being the supported frequency for the i5 4670k.

Tradesman1 · Jun 6, 2014

That's what the CPU 'supports' at spec (and Intel under specs everything), and again that's the CPU, the DRAM is made to run at 1866 (or 2133 or 2400 or whatever it's spec is), ere 1866, so in effect you MAY be required to OC the the Memory Controller (in the CPU) or possibly even the CPU itself to run higher freq DRAM

zoog18 · Jun 6, 2014

This ram is for a new build, and I did not really want to overclock the i5 right away to get my ram to work, I am getting 16GB since I will use it quite often for video editing, but it will also be used for gaming so I wanted low latency ram with a high frequency and the kit I was looking at fits the bill, what I am wondering is how good a chance their is that i will have to overclock the cpu to get it run at the stated spec.

spooky2th · Jun 6, 2014

You should be able to run the memory at advertised speed without OC'ing the CPU.

zoog18 · Jun 6, 2014

So even if I buy 1600mhz ram i will need to tweak it in the bios to have it run at that speed?

Tradesman1 · Jun 7, 2014

When you install DRAM, on any mobo, it initially goes to the mobo default, most often 1333 or 1600, then you simply set the DRAM up, on Intel 1600 and higher sticks, simply enable XMP and select profile 1

zoog18 · Jun 7, 2014

Of these two memory kits, which do you think I should go with? (In terms of gaming)

http://www.newegg.ca/Product/Product.aspx?Item=N82E16820231628&AID=10657534&PID=3938566&SID=&nm_mc=AFC-C8JunctionCA&cm_mmc=AFC-C8JunctionCA-_-na-_-na-_-na

http://www.newegg.ca/Product/Product.aspx?Item=N82E16820231623&AID=10657534&PID=3938566&SID=&nm_mc=AFC-C8JunctionCA&cm_mmc=AFC-C8JunctionCA-_-na-_-na-_-na

Tradesman1 · Jun 7, 2014

I'd go the 1866/8 sticks, the Tri's are great with Haswell

zoog18 · Jun 7, 2014

I noticed that the voltage is 1.65v, isn't haswell's supported voltage 1.5v? How do I get around this and is it still solved by just going into the XMP profile?

Tradesman1 · Jun 7, 2014

1.5 is the suggested voltage for base 1600 sticks, 1.6-1.65 is perfectly fine for high freq and high performance sticks, Intel even certifies (gaming or high performance) DRAM these days and the bulk of them are 1.6-1.65

spooky2th · Jun 7, 2014

1.65V for memory won't hurt a thing.

Use 1866mhz ram with i5 4670k?

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