Solved DDR4-2133MHz can't OC past 2800MHz

Hidde663 / My first build
May 3, 2018 at 05:23:37
Specs: Windows 10 Pro 64bit, i5-6600K[delid]@4.8GHz/4.4GHz@1.39v LLC=6 | 2x4GB Crucial-DDR4-2133CL15@14-13-13-28 1T 2800MHz@1.37v
i got myself a cheap 2x4GB crucial DDR4 kit.(rated 2133@15-15-15-35 t2 @1.2 vDIMM)
I managed to OC it to 2800MHZ with 14-13-13-28 t1 timings @1.37 vDIMM

The thing is i want it to run @ 3000~3200MHz range, tho I can't get it to post even
@ 2900 18-18-18-44 t2 @1.4 vDIMM

I have not tried to set VCCIO &/or VCCSA really high, altho my mobo(Z170-K) sets them quite high by default

with BCLCK i can achieve about 2865MHz @ 14-14-14-28 t1 @1.37 vDIMM
I have a feeling its either the MOBO or CPU(i5 6600K at this point(IMC))

Any suggestions on getting past the 2800MHz range?

i5-6600K[delid]@4.8GHz/4.4GHz@1.39v LLC=6 | 2x4GB Crucial-DDR4-2133CL15@14-13-13-28 1T 2800MHz@1.37v
MSI Armor RX 570 4GB@1420Mhz core@1.218v/1900MHz BiosModded


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#1
May 3, 2018 at 17:03:10
It was cheap & rated at 2133MHz for a reason.

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#2
May 3, 2018 at 20:26:59
✔ Best Answer
The chips on the memory are 'Binned' according to what they can consistently achieve. When they are making cheaper memory sticks they pull the lower performing chips and use them because they are not capable of running at the higher speeds and decent timings. For the most expensive, highest performing memory sticks they pull the chips from the best performing bins and make sure that they are all closely matched to each other so there are no weak links to hold them back. They are typically rated both higher frequencies and tighter timings, but you have to pay for that. The slightly less performing chips are made into some really good memory sticks slightly below the fastest frequencies with good timings and good matching. It is these that you can usually push into the beginnings of the speeds that others are willing to pay premium prices for and save some money.

I look for memory listed just below the best speed where the prices are significantly less but no where near the cheapest. I look for the lowest timings and make sure that they are not listed at the higher voltage requirements (both signs of poorer quality). Then you have the ability of you want to try overclocking them or just use the XMP setting options (which I often do). These are quality memory sticks that can overclock well and last many years. The lower voltage requirements also mean that you have overhead there if needed as well.

You have to be a little bit crazy to keep you from going insane.


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#3
May 4, 2018 at 06:42:35
Isn't that what I said? ;-)

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#4
May 4, 2018 at 08:34:09
thanks for your opinions, i guess these stick do pretty well for a price tag of 65$
& they do come pretty close to the theoretical max throughput limit of:
2800*(64*2)/8(bit) =44.8 GB/s
AIDA64 Extreme indicates around 42 GB/s

i5-6600K[delid]@4.8GHz/4.4GHz@1.39v LLC=6 | 2x4GB Crucial-DDR4-2133CL15@14-13-13-28 1T 2800MHz@1.37v
MSI Armor RX 570 4GB@1420Mhz core@1.218v/1900MHz BiosModded


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