CPU / RAM overclocking

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The Original Ralph

The Original Ralph

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Sep 14, 2011
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just finished building my new PC, specs in the sig below

kept getting BSOSs at the oddest times during generally light tasks, browsing the web etc but only browsing with mozilla, not with IE11. Rendered a couple of vids where RealTemp was showing 90-92% load, rendering jobs were 17 to 22 minutes in length, and did not experience the first BSOD

whenever i'd get the BSOD, it would stay on screen at least long enough for me to read it, but main heading said "MEMORY MANAGEMENT ISSUE" or something to that effect.

I disabled Turbo boost, both levels (my mobo has 2 levels of boost) but the BSODs continued, again only during odd light general tasks.

I had gone with the corsair 2800 which is on the motherboard's QVL, and is correct for the CPU, ie non-ECC, but i remembered a qualification or spec on the CPU's spec sheet indicating it supported 2133

Max Memory Size (dependent on memory type) 64 GB
Memory Types DDR4 1333/1600/2133
Max # of Memory Channels 4
Max Memory Bandwidth 68 GB/s
ECC Memory Supported ‡ No

The BSODs stopped with i dis-abled XMP and selected "jedec 2133" for the ram

any idea if I will be able to take the ram up a notch or two?

I've OC'd the CPU to 4.0 stablily, with temps running in low to mid 50C with 100% load (Prime95 v26.6). The OCing, i basically used XTU, ran a benchmark, then let XTU post it to HWBOT on the web, and comparing to others with the same CPU & X99 chipset, copied or download those settings that showed high compatibility.

and any other suggestions or have i hit it's ceiling at 2133 ?
 
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CorsairSSC

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Aug 9, 2016
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CPU overclocks to 4.0 Ghz normally do not cause problems like this. I suspect two things:

1) One or more of your RAM sticks are dead or are causing voltage problems
2) The list of memory speeds doesn't seem like DDR4, but rather DDR3. I know it's stupid to ask but are you using the right RAM?
 
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The Original Ralph

The Original Ralph

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i should have added two details - the BSODs were occurring before i overclocked, at stock speed of 3.2. I'd even dis-abled turbo boost as it's Turbo Boost 3.0, and intel sez my cpu only supports Turbo Boost 2.0, hoping that was the cause, but no love. The BSODs didn't stop until i changed ram speed back to 2133

and now that you mention it, when it would BSOD i would find two sticks not showing up in BIOS - my BIOS would show 48 GB and two slots, C1 & C2 as not populated or not available (i forget the actual phrase),

I purch'd my ram in packs of 4 sticks each, and when i installed them, one pack went in all the A1, B1, C1 & D1 and i color marked them so as to not mix them up with the other pack. 2nd pack went into all the "2" slots, so i'd find it odd that two neighboring sticks, from different packs, would both be bad. I did unseat all the sticks and re-seat them in the slots, just to be sure they were fully seated.

Finding two sticks "not available" happened 3X, and each time i'd reflash the latest BIOS and that would bring them back online with bios showing the full 64 GB.
 
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TJ Hooker

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You can't physically put a DDR3 stick into a DDR4 slot (or vice versa). So this wouldn't be the issue.


It's always recommended to buy all your RAM as a single kit, because separate kits are not guaranteed to work together, even if they're the brand/model. I can't say for sure, but I'd guess that mixing RAM kits is your issue. You may be able to get them working by manually tweaking the timings/voltage.
 
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The Original Ralph

The Original Ralph

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problem is or was, when i bought these no one offered 64 GB packs that were on the QVL for my board. I'd preferred to have gone with 16GB sticks and those only recently became available . But that was the reason i kept all the sticks from one pack in all the "1" slots, and the 2nd pack in the "2" slots

if it's incompatible ram, why would it only occur on two ram sticks from different packs on neighboring slots, C1 & C2. But that does give me an idea - i might try moving those sticks to different slots and seeing if the issue follows them to the new slots are it still occurs at C1 & C2.

But again, it hasn't happened since i adjusted the speed on the ram down to what intel sez it supports, 2133

 
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The Original Ralph

The Original Ralph

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didn't want to bother a friend, a retired microsoft engineer, but i just got off the phone with him

for anyone else researching this topoic

1st thing he recommended, to remove the four sticks in the secondary slots (A2, B2 etc) and see if i can walk the sticks up to 2800 without BSODs. And he said to mark each stick i removed so i knew what slot it came out of before removing

Then with only 32GB ram installed, run the clock speed up and see if the BSODs started occurring again. If not, it might be either a bad ram stick in the 2nd set of sticks or a mismatch. Reason to mark the secondary sticks before pulling, if i could get to 2800 w/o BSODs, then when re-installing the secondary sticks, to make sure to not put the same stick in the C2 slot.

If with one set of ram in the primary slots, BSODs returned, to remove them and insert the sticks from the secondary slots into the primary slots and try with only them installed - it might be a bad stick in that first set that's causing the issues.

Basically he gave me a direction to go to help identify
 
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