Weird ram issue, 2 stick not showing at all, then they were.

[andrew breckill]

A bit like asking for clairvoyance with this one. I know ram is a law unto itself at times. I added 256gb ddr4 ram (3200) to my shiny new asrock trx40 taichi, went into bios, bios showed 8 sticks, but two had no ram amount next to them, bios showed the speed, but capacity was showing as zero for these two sticks. So I quit bios and let it boot, got a message memory training failed for the two sticks, window booted OK, and 6 sticks showed in task managers screens. turned off power moved the ram to next two slots along, same issue, the sticks, not the slot seemed the guilty party. so rang OC and got an rma and ordered some new ram for use whilst it got sorted, whilst waiting for new ram Did a bit more reading, cleaned all contacts, moved all the ram around and checked everything was seated right, did a bios reset, and boom, the system booted with all 8 sticks, then next day they went off again, so reset bios, rebooted, they were there again but only at 2133mhz, sso usedd system like that, then today tried again to run at 3200mhz, and they all are, and seem to be working properly, (did loads of rendering tests, using maya, did some photogrammetry using reality capture, basically given it a good work out, so what do i do? keep memory as this is parr for the course or should i send it back still?

 

[andrew breckill]

thanks for the heads up. i used 128 gb on previous build and that was hassle free. so was a bit surprised at what happened. i will prolly give it a good workout over weekend and maybe give them another call on monday if it falls over. i have noticed the ram sockets for ddr4 seem a bit shallow compared to ddr3, on last board one stick spontaneously popped out once.

 

[andrew breckill]

Hey all, No previous build was an x399 with 1950x threadripper.
I did run windows memtest once all chips were recognised at 2133mhz, and no errors.
As for present situation, I removed them all again, cleaned all contacts with rubbing alcohol and double checked all seated properly and system been running spot on all week. Which is great, as at first I was convinced two were faulty. All running at 3200mhz and system is kicking it. I often have 4 copies of a photogrammetry program running with up to 1000 photos to process in each instance and this amount of memory handles it perfectly. Also can use much higher particle counts in Houdini which is massively helping look dev.

 

[andrew breckill]

i am going to redo the thermal paste as only had some cheap and cheerful akasa paste left when cpu arrived, got a tube of kryonaugt arriving next week, will double check cpu, when aio is off. i have fitted a few if these cpu's now so pretty confident its ok. like i mentioned been crash free and issue free all week and i have been doing some intense computations.