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Memory OC - unexpected

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SentinelAeon

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Sep 28, 2020
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I am overclocking my memory for a short but to me very important test i am doing. I have done my fair share of memory OCing and never encountered such stubborn stick. Using an p8z77-v lx, i5 2500k and 2x4GB ballistic sport sticks.

The stick defaults to 1600Mhz 9-9-9-24, at 1.6V it will do 1600Mhz 8-9-8-17 or 1866Mhz 9-10-8-32. At 2133Mhz it will not boot no matter the voltage or timings. Now, i wouldn't be surprised at that if for instance it took high timings like 13-13-13-40 to get it to run at 1866Mhz. But it can do that with fairly close to stock timings. I used to be able to boot at 2133Mhz with 1333Mhz office-grade sticks on this very system years ago so it surprised me that this sticks simply lock at 1866Mhz.

I would really like to finish this test and all i am missing is 2133Mhz, i would really hate to buy a new ram just for this last bit. So before i do that and buy new ram for 1 test only, i am wondering if someone has an advice on what else i can try to make this ram boot at 2133Mhz.

I did the usual things. Up to 1.7V ram, increased memory controller voltage, tried tweaking secondary timings (but its a lottery with those since i dont have any data as to which timings are even within spec for this ram), etc.
 

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SentinelAeon said:
I am overclocking my memory for a short but to me very important test i am doing. I have done my fair share of memory OCing and never encountered such stubborn stick. Using an p8z77-v lx, i5 2500k and 2x4GB ballistic sport sticks.

The stick defaults to 1600Mhz 9-9-9-24, at 1.6V it will do 1600Mhz 8-9-8-17 or 1866Mhz 9-10-8-32. At 2133Mhz it will not boot no matter the voltage or timings. Now, i wouldn't be surprised at that if for instance it took high timings like 13-13-13-40 to get it to run at 1866Mhz. But it can do that with fairly close to stock timings. I used to be able to boot at 2133Mhz with 1333Mhz office-grade sticks on this very system years ago so it surprised me that this sticks simply lock at 1866Mhz.

I would really like to finish this test and all i am missing is 2133Mhz, i would really hate to buy a new ram just for this last bit. So before i do that and buy new ram for 1 test only, i am wondering if someone has an advice on what else i can try to make this ram boot at 2133Mhz.

I did the usual things. Up to 1.7V ram, increased memory controller voltage, tried tweaking secondary timings (but its a lottery with those since i dont have any data as to which timings are even within spec for this ram), etc.
Click to expand...
I've read a lot about all these "green" DDR4 2133 sticks that can oh gosh even 3200 (lol). IRL, I've never found such a bingo golden sample.
So what is advice for you - get some DDR4 setup with 2133 sticks - and chill out.
 
SentinelAeon said:
I thought getting 1600Mhz sticks to boot at 2133Mhz was pretty common. Am i wrong in thinking that ?
Click to expand...
probably needs some memory controller voltage, and I can't seem to remember what it is called on z77.
 
SentinelAeon said:
I thought getting 1600Mhz sticks to boot at 2133Mhz was pretty common. Am i wrong in thinking that ?
Click to expand...
Yes.

I've only had one or two kits start at 1600 that actually work at 2133. Binning higher speeds is done for a reason.
 
BBSE was pretty flexible, most Hypers were pretty decent. Some PSC were ok. What do they do with 1.75v?
 
SentinelAeon said:
I thought getting 1600Mhz sticks to boot at 2133Mhz was pretty common. Am i wrong in thinking that ?
Click to expand...
I still have a kit of 1600MHz sticks that will boot & bench at 2133MHz - memtest86+ stable as well, helps a lot when they are optimised for the platform. This is on an old Lindfield socket board with an i7-860.
 
The limit is around 1866-2133 for that chip.

You hit your chips limit thats all.

A 2600k or 3770k would prob do better
 
@Launcestonian
might wanna start using sw thats for testing tweaked ram, not something designed for detecting defective ram.
i have never seen anything called memest, with anything after that (86/more), showing errors after running full test suite multiple times,
but things like HCI/TM5 throwing errors within minutes..
 
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SentinelAeon said:
I thought getting 1600Mhz sticks to boot at 2133Mhz was pretty common. Am i wrong in thinking that ?
Click to expand...
1866 for ddr4 price - maybe.
not all these 1600s.. maybe, THOUGH, some kindda of "Corsair Dominator Platinum" when it wasn't just about RGB... MAYBE
 
Are you on one pair or two?
I've had some DDR3 boards that will push 1600 down to 1333 like my Mushkin kit and it would be a struggle just getting it to post properly.
Then there are boards that will take a 1600 Ballistix kit and it will do 1866 with little to no trouble.
The 16GB G.Skill kit sitting in my rack does 2133 pretty well but if I add another kit it may downclock them to 1866. The FX memory controller is a bit weird.
 
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