RAM Slots 1 and 2 get an error code 55 and wont post on the gigabyte z170x gaming 7, but not slots 3 and 4

[JPM300]

Hi Everyone,

I was building my computer yesterday and everything was working fine till i found out that RAM slots 1 and 2 of the gigabyte z170x gaming 7 get an error code 55. Now slots 3 and 4 work and the computer boots up and it underclocks my RAM from 2400 to 2133.

My build:
Intel Core i7-6700K 4.0GHz Quad-Core Processor
Corsair H110i GTX 104.7 CFM Liquid CPU Cooler
Gigabyte GA-Z170X-Gaming 7 ATX LGA1151 Motherboard
G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory
Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive
Phanteks Enthoo Pro ATX Full Tower Case
EVGA 850W 80+ Gold Certified Fully-Modular ATX Power Supply

Note that the hard drive is not connected to the build yet.

I think it is probably the mobo but i would like a second opinion thanks.

 

[n0ns3ns3]

Try to reset the BIOS.
Sometimes it helps.

 

[John_VanKirk]

Hello,
One thing that is unusual is how GB has numbered the RAM sockets on this board. From CPU to right it is 4, 2, 3, 1.
They recommend using slots 2 and 1 (2nd and 4th) for two sticks. Double check that your RAM sticks on in the correct sockets.
The 2133 MHz speed is the default speed for DDR-4 and they should run at that speed until you select XMP in the UEFI. The they should run at stated speed.

One other thing you can do is connect a small 2-3" speaker onto the appropriate spkr I/O pins. If there is a memory problem you should get a Beep error code. Depending on who made the BIOS, a Long/Short, or two short, or a Long/2short beeps indicates a memory problem. Will list the basic beep codes in your manual.