P750DM3 (P775DM2 Mobo) 4 DIMMs, 64GB, All Dual Rank, Mix Kit OC’d to CL18, 3200mHz sticks

[ShifflyTheSHO]

Does anybody have any recommendations for my mixed kit of of Dual Rank memory?

 

or simply, am I over heating my P750 by setting the offset of th ‘memory controller PLL’ to “6” and my SA PLL to to 4?  Ring is at +2 and I’m going to see if I get the BSOD when I turn it down to 4.

 

The kits are exactly the same construction: some black sticks of Timetec Pinnacle 32GB KIT(2x16GB) DDR4 3200MHz PC4-25600 CL16-20-20-40 1.35V OC Laptop SODIMM Non-ECC Unbuffered 2Rx8 Dual Rank 

 

and
 

PNY XLR8 Gaming 32GB (2x16GB) DDR4 DRAM 3200MHz (PC4-25600) CL20 1.2V

 

all slapped together so the system can run, but any of the modules as a dual channel or single channel kit or individually WILL NOT POST so I threw them both together to sit happily together, no matter what, these thing overheat of something and the system errors with uncorrectable errors or invalid write addresses.  

I got an hour out of everything just now and I’m letting everything cool down and going to loosen everything and hope for the best!

 

I don’t recommend Dual channel anything for the P770, but if the RAM is built the same, should I just slow everything down to the CL20 speed?  
 

I know I don’t need more than 32GB, but now I want to do some video editing for the sake of having two kits just sitting here.

 

oh wait, one kit is Micron and rhe other Hynix, but they look great and match each other perfectly

 

tl;dr

 

I’d recommend a two 2x8GB lits of either and slaping them together so the speed drops to 2400mhz unless you want toboverclock the IMC

Thank you for coming to my TEDRamble.
 

[ShifflyTheSHO]

Disregard my post.  System Agent and Memory controller should both have been around +4 offset (0.070 mV) and hotter was definitely causing some errors and crashes.

 

Why do those offset options have the ability to go as high as 63?

[ShifflyTheSHO]

PNY CL20 RAM also sucks ar 3333mhz cl20 and 3200mhz CL18 where the other ones do fine!

 

Timetec CL16 can run 16-18-18-36, tFAW 28, and tREFI 12480, tRFC 448, and tRTP 12 at 1.35v, but you might have to bump the Memory Controller by 2.  4 causes instability with out 4 sticks and I don’t know why I didn’t recognize that sooner…

[incendery]

check page 110~ in the schematic here (dm3 but the dm2 VRMs are essentially cloned)
I'm not sure the offsets in bios do anything to affect these voltages unfortunately as the outputs appear fixed (except for vcore) and vcore/uncore are not seperately adjusted.

I could be incorrect on this but it may be worth investigating 🙂

https://oem.whyopencomputing.ch/Computers/Service Manuals/2023.11.22_P775DM3_Service_manual.pdf