Do I need a fast Memory if I want to overlock my CPU

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rleulink

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I built several PCs before but I never overclocked anything. I need a fast CPU to compile FPGA bit file. I plan to buy the i7-5820k and wish to get it from 3.3 GHz to 4.0 GHz on Asus X99 Deluxe motherboard (I believe it provides a good overclock result with basic adjustments on stock pre-defined settings).

I do not really care about the speed of DDR4 as long as it is from a reputable vendor with low price. The question: Do I need to buy a high speed memory to overclock the CPU? The high speed rams cost as much as 2x/2.5x the slower ones (2800 vs 2666 vs 2133).
 
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rleulink

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Thanks for the answer and the tip - I actually tried to understand what he said (yes or no). I will go with the slow speed to save $$ for other components.

 
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Dunlop0078

Dunlop0078

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Yes that is a good idea. And as far as ram speed it doesnt matter much at all especially if you are a gamer that ddr4 at 2133mhz very fast ram and pretty much overkill for any game. I have 1866mhz ddr3 ram and it is plenty fast enough for me. There are certain things where extremely fast ram can come in handy such as mining. But for the average user or gamer you probably wont notice a difference between 1333mhz ram and 2800mhz.
 
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plast0000

plast0000

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excellent
that's what I meant to say, but I didn't give more detailed explanation as you did, so sorry for that
 
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rleulink

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Thanks. I am not a gamer (just play 2-3 shooting games which require a few days to finish per year), I only run some computational/(kind-of) programming software like MATLAB, LabVIEW, Xilinx ISE, and sometimes 2D AutoCAD.
 
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Tradesman1

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Gaming basically uses DRAM as nothing more than a conduit, but even then going from 1600 to 1866 can be additional 3-5 FPS and 1866 to 2133 a few more.....Fast DRAM shines when muti-tasking, doing video, imaging, CAD, VMs anything with large data sets, etc....and yes you can tell a difference
 
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Dunlop0078

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https://www.youtube.com/watch?v=W0L_KFKJYvg

There is basically no difference in gaming 1-2fps. I can find a thousand more like this one. But im not an expert with cad and stuff like that but i am pretty sure ddr4 memory at 2133mhz is plenty fast enough for some cad i mean please correct me if im wrong.
 
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Tradesman1

Tradesman1

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Yes there are plenty of videos saying 1-2, there are other saying more, a lot depends on the individual game, the CPU being used (i.e. AMD has weaker MCs than Intel and you'll see less of a difference as AMD doesn't utilize DRAM as well as Intel............same can be said of individual games....same with those using an iGPU.... but overall in general Yes, you'll show gains, may be marginal in one instance with a given rig, and may be large in another with the same rig. And leaving gaming behind, as said above is where fast DRAM as the examples were given, the more you actually use the system the more you will notice
 
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rleulink

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Thanks for all - I was able to get my 5820K to be 4.6GHz with basically 3 settings on Asus X99 Deluxe Bios: multiplier to be 37 and strap to be 125MHz + other to be default/auto setting my the motherboard. I ran my ram at 2448MHz. I will not ever touch any settings again ^_^
 
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