X99-UD4 endless boot cycle, ram to blame?

[wobble64]

Hello.

Just put together a new server, specs are:

Board: X99-UD4 rev 1.0

CPU: Intel Xeon e5-2620v3

Graphics: Asus 1GB HD-6450

Ram: 2x8GB Crucial CT8G4RFS4213.18FA2

Power supply: Enermax xt-730


Problem is not unknown: it never shows the BIOS screen, instead rebooting endlessly, staying on 5-15 seconds at a time. I unplugged all unneeded connections (i.e. front panel USB, audio and hard drives).

I also tried unplugging the graphics card (currently in PCI slot 1), switching the two 8gb ram modules (ram is in slot 3) and using Q-Flash plus to install a new BIOS (I tried all versions) and checked if any CPU pins had been bent, also not the case.

I just noticed in the Gigabyte manual that when using RDIMM ram it should be "1Rx8" rank. I was unaware of this requirement at time of purchase and the label on my ram modules reads: "8bg DDR4 - 2133 1.2v SR x4 RDIMM" which I guess means it is x4 and not x8.

Is it reasonable to assume that the ram is to blame? I don't have another module to test with, so would have to send it back and get the recommended kind before I could know for sure.

Anybody have any experience with this?

EDIT: At first I also tried unplugging power, resetting CMOS and leaving it a few days which also did not help.

[qwerty]

Going through the exact same thing with 2400 RAM (i checked the compatibility list, should be fine).

I installed using 1 DIMM, two DIMMS works although not 4

Its hard for me to memtest/swap parts out as they're all brand new. I'm going to update BIOS this evening and tinker with RAM configurations, i'll let you know how it goes.

[dmdilks]

This is what I used to get things running till I got the G Skill memory. Crucial 8GB (2 x 4GB) 288-Pin DDR4 2133 (PC4-17000) Model # CT2K4G4DFS8213

http://www.newegg.com/Product/Product.aspx?Item=N82E16820148858

I'm running the G.SKILL Ripjaws 4 series 16GB (4 x 4GB) 288-Pin DDR4 SDRAM DDR4 2133 Model # F4-2133C15Q-16GRR.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231784

[dmdilks]

I was looking at you memory. You have the wrong memory you have ECC memory. You should be running Non-ECC memory

http://www.memorysolution.de/Produkte/Arbeitsspeicher/DDR4/DDR4-2133%20ECC%20REG/8GB%20Crucial%20DDR4-2133%20CL15%20(1Gx4)%20ECC%20reg.%20SR%7CD4B8GCR2133A15.pdf

[wobble64]

I spoke to Gigabyte support and they stated the same, that x4 ram is not supported, they sent me the Intel-Table below. I believe x8 RDIMM would also be fine, but I am sticking with non-ECC UDIMM this time.

Thanks for your help.

[qwerty]

Who did you speak with, can you point me in the right direction. I'm still having RAM woes, can only get past POST with 1xDIMM

[wobble64]

Well, by "spoke" I meant I created a ticket and they replied 

You can do the same here at the bottom half of the page: http://www.gigabyte.com/support-downloads/support-downloads.aspx

In my case they replied within 12-24 hours, so just be patient.

[qwerty]

Thanks mate, appreciate it!

[dmdilks]

The thing is that when you install the memory it auto picks it up. I had to do nothing to set the memory it pick it up at 2133.

So what might be happening is it could be the same thing. Any thing over 2133 you will have to OC your CPU just a little to get them to work.

Yes one stick might work but when you start adding more memory. Your CPU has to work just a little harder to get them to work.

What does it say in the bios on the memory speed. If it is picking them up at 2400 try to under clock them to 2133 to see if it will work.