11600K, 32GB 3200Mhz (2x 16GB) advice

modd1uk · 22 Oct 2021 at 22:08

Hello folks I'm after a bit of advise, never too proud to ask for help.

I've got an 11600K here that will run 2x 8GB 3200MHz fine, memtest 0 issues, boot to windows and work perfectly.

I got a good deal on a 32GB kit of the same RAM but 2x 16GB @ 3200Mhz.

PC boots / passes memtest with 1x 16GB 3200MHz DIMM in running at 3200Mhz but won't post at 3200MHz with both sticks in.

The other stick is the same, boots fine @ 3200MHz, its just if you fit both 16GB DIMMS it refuses to post at 3200MHz...but will work fine @ JDEC of 2400MHz.

Answers on a post card please folks, the RAM is on the QVL list for the board, its a B560 Tomahawk WiFi & i5 11600K.

Thanksssss

Joxeon · 22 Oct 2021 at 23:48

Maybe try a bios update if your not already on the most recent.

Sean473 · 23 Oct 2021 at 00:34

Yeah that would be the natural thing to do in the 1st instance!

modd1uk · 23 Oct 2021 at 11:48

Already on the latest BIOS that was the first thing I did. It seems it'll do it in Gear 2 but not Gear 1, common with the 11th Gen i5's apparently.

Joxeon · 23 Oct 2021 at 12:44

Have you tried setting XMP but manually changing ram to T2?

What VCCIO/VCCSA voltages is the board using?

Is the ratio showing 133:24:1 when set to gear 1?

Louitrilobite · 4 Nov 2021 at 08:54

Sorry if this is obvious to you... But are you putting the two sticks in DIMMA2 and DIMMB2 where they should go on your board. I only ask as I recently had a similar issue when putting some CMK32GX4M2K3600C16 on my ASUS Z590-A, I did not know as I had not read the manual, but apparently two sticks for my board and yours must go in A2 and B2 and not A1 and B1.