16GB DDR3 2400 with Stock i7 4790k?

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tonytran

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Apr 4, 2013
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So I'm planning to upgrade my ram to the
G.Skill Ripjaws X 16GB (2x8GB) DDR3 Dual Channel RAM,2400MHz

My CPU is the i7 4790k 4.0ghz

What I don't understand is that you have to OC the CPU by a certain amount to take Advantage of the 2400Mhz Ram am I right ?
And by how much ?

What will happen if I don't OC the CPU 4790k ?
Will the Computer won't boot?
Will the Ram won't work ?
Can't utilise the 2400mhz?
The Ram will only work at 1600mhz?
Means it's a Wasted of Money ?

Also what's Better Dual Channel or Quad Channel Ram ?
 
Solution
Spectre694


I did answer your question. You asked if you had to OC the CPU to use OC RAM. I said no they can be OC'ed separately meaning OC one has nothing to do with the other on Haswell. So yes you can run whatever RAM you would like with a stock 4790K.

Yes XMP is the easiest way to OC RAM...
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DasHotShot

DasHotShot

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Feb 17, 2015
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It is a waste of money for most users though as they a) don't know how to overclock their ram and don't want to bother learning it and b) most people use it for gaming but almost no game shows differences over 2-3 FPS between 1600Mhz and 2400Mhz Ram...

Save the cash, get a standard kit of 1600 or 1866 and play games ;-)
 
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tonytran

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That didn't make any sense,
Please answer the question.
If I used 2400mhz ram with stock cpu will the computer still work?
My Mobo is the Gigabyte GA Z97X UD5H.

I've also heard you can just go into bios and set XMD to profile1 and your done?

But if it doesn't work then you'll need to UP the CPU multiplier with a bit of voltage to run stable? Idk
 
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Spectre694

Spectre694

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I did answer your question. You asked if you had to OC the CPU to use OC RAM. I said no they can be OC'ed separately meaning OC one has nothing to do with the other on Haswell. So yes you can run whatever RAM you would like with a stock 4790K.

Yes XMP is the easiest way to OC RAM
Still no. Should not have to mess with the CPU speeds to OC RAM on Haswell
 
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tonytran

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I agree with you DasHotShot but then again the Ram is already OC at 2400mhz why would I want to OverClock it?
In fact I never said anything about OC my ram.
I said do I need to OC my cpu to utilise the 2400mhz for it to work properly?

I also Read somewhere saying you can just go into bios set it to XMD profile 1 and it should work?
But if it doesn't boot them you'll need to boost the CPU multiplier with a bit voltage for it to run stable, Is this true ?
 
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DasHotShot

DasHotShot

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That isn't 100% true Spectre...

If you OC the ram your preqvious CPU OC probably won't work and will need a new config. When you OC ram you will usually have to OC the CPU again or leave it stock. At Stock it doesnt matter what you did to the ram.
 
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tonytran

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tonytran

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Best Answer goes to Spectre694

 
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Tradesman1

Tradesman1

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Jun 5, 2013
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Your MC (memory controller) is in the CPU and yes at times you will need to run an OC to run DRAM to full spec. If they were completely independent then you could have a lower end CPU like a i3 or even a 4460 running 3000 and up DRAM, which just isn't going to happen. I've seen 4790Ks that can run 2800 at stock (very few), have seen others that can't run 2133/2400 at stock. I covered this in my Fiction article, item 4, here:

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