Hi Cdoge88.
That is still mixing RAM even if they are the same brand and model. They were not sold in the same RAM KIT which mean they were not tested together and are not made from the same batch. Could be why they are not working well together.
Another thing that could be the issue is that you use 4 sticks instead of 2 sticks. The memory controller is working harder and sometimes you cannot use the advertised speed when using 4 sticks instead of 2.
What is your BIOS version?
Did you try running them slower to see if it stick?
I have noticed that two show up as dual-rank and two as single rank in CPU-Z, could that mean anything?
What It said
Memory SPD
-------------------------------------------------------------------------
DIMM # 1
SMBus address 0x50
Memory type DDR4
Module format UDIMM
Module Manufacturer(ID) Corsair (7F7F9E0000000000000000)
SDRAM Manufacturer (ID) Micron Technology (2C00000000000000000000)
Size 8192 MBytes
Max bandwidth DDR4-2132 (1066 MHz)
Part number CMK16GX4M2A2666C16
Nominal Voltage 1.20 Volts
EPP no
XMP yes
XMP revision 2.0
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 9.0-9-10-22-31 @ 666 MHz
JEDEC #2 10.0-10-11-25-35 @ 740 MHz
JEDEC #3 11.0-11-12-27-38 @ 814 MHz
JEDEC #4 12.0-12-13-30-42 @ 888 MHz
JEDEC #5 13.0-13-14-32-45 @ 962 MHz
JEDEC #6 14.0-14-15-35-49 @ 1037 MHz
JEDEC #7 15.0-15-15-36-50 @ 1066 MHz
JEDEC #8 16.0-15-15-36-50 @ 1066 MHz
XMP profile XMP-2666
Specification DDR4-2666
Voltage level 1.200 Volts
Min Cycle time 0.750 ns (1333 MHz)
Max CL 16.0
Min tRP 13.49 ns
Min tRCD 13.49 ns
Min tRAS 26.11 ns
Min tRC 39.74 ns
Min tRRD 3.74 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-11-11-20-30-n.a @ 750 MHz (1.200 Volts)
XMP #2 10.0-12-12-22-34-n.a @ 834 MHz (1.200 Volts)
XMP #3 11.0-13-13-24-37-n.a @ 917 MHz (1.200 Volts)
XMP #4 12.0-14-14-27-40-n.a @ 1000 MHz (1.200 Volts)
XMP #5 13.0-15-15-29-44-n.a @ 1084 MHz (1.200 Volts)
XMP #6 14.0-16-16-31-47-n.a @ 1167 MHz (1.200 Volts)
XMP #7 15.0-17-17-33-50-n.a @ 1251 MHz (1.200 Volts)
XMP #8 16.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #9 17.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #10 18.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #11 19.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #12 20.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
DIMM # 2
SMBus address 0x51
Memory type DDR4
Module format UDIMM
Module Manufacturer(ID) Corsair (7F7F9E0000000000000000)
SDRAM Manufacturer (ID) SK Hynix (AD00000000000000000000)
Size 8192 MBytes
Max bandwidth DDR4-2132 (1066 MHz)
Part number CMK16GX4M2A2666C16
Nominal Voltage 1.20 Volts
EPP no
XMP yes
XMP revision 2.0
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 9.0-9-9-22-31 @ 666 MHz
JEDEC #2 10.0-10-10-25-35 @ 740 MHz
JEDEC #3 11.0-11-11-27-38 @ 814 MHz
JEDEC #4 12.0-12-12-30-42 @ 888 MHz
JEDEC #5 13.0-13-13-32-45 @ 962 MHz
JEDEC #6 14.0-14-14-35-49 @ 1037 MHz
JEDEC #7 15.0-15-15-36-50 @ 1066 MHz
JEDEC #8 16.0-15-15-36-50 @ 1066 MHz
XMP profile XMP-2666
Specification DDR4-2666
Voltage level 1.200 Volts
Min Cycle time 0.750 ns (1333 MHz)
Max CL 16.0
Min tRP 13.49 ns
Min tRCD 13.49 ns
Min tRAS 26.11 ns
Min tRC 39.74 ns
Min tRRD 3.74 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-11-11-20-30-n.a @ 750 MHz (1.200 Volts)
XMP #2 10.0-12-12-22-34-n.a @ 834 MHz (1.200 Volts)
XMP #3 11.0-13-13-24-37-n.a @ 917 MHz (1.200 Volts)
XMP #4 12.0-14-14-27-40-n.a @ 1000 MHz (1.200 Volts)
XMP #5 13.0-15-15-29-44-n.a @ 1084 MHz (1.200 Volts)
XMP #6 14.0-16-16-31-47-n.a @ 1167 MHz (1.200 Volts)
XMP #7 15.0-17-17-33-50-n.a @ 1251 MHz (1.200 Volts)
XMP #8 16.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #9 17.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #10 18.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #11 19.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #12 20.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
DIMM # 3
SMBus address 0x52
Memory type DDR4
Module format UDIMM
Module Manufacturer(ID) Corsair (7F7F9E0000000000000000)
SDRAM Manufacturer (ID) SK Hynix (AD00000000000000000000)
Size 8192 MBytes
Max bandwidth DDR4-2132 (1066 MHz)
Part number CMK16GX4M2A2666C16
Nominal Voltage 1.20 Volts
EPP no
XMP yes
XMP revision 2.0
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 9.0-9-9-22-31 @ 666 MHz
JEDEC #2 10.0-10-10-25-35 @ 740 MHz
JEDEC #3 11.0-11-11-27-38 @ 814 MHz
JEDEC #4 12.0-12-12-30-42 @ 888 MHz
JEDEC #5 13.0-13-13-32-45 @ 962 MHz
JEDEC #6 14.0-14-14-35-49 @ 1037 MHz
JEDEC #7 15.0-15-15-36-50 @ 1066 MHz
JEDEC #8 16.0-15-15-36-50 @ 1066 MHz
XMP profile XMP-2666
Specification DDR4-2666
Voltage level 1.200 Volts
Min Cycle time 0.750 ns (1333 MHz)
Max CL 16.0
Min tRP 13.49 ns
Min tRCD 13.49 ns
Min tRAS 26.11 ns
Min tRC 39.74 ns
Min tRRD 3.74 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-11-11-20-30-n.a @ 750 MHz (1.200 Volts)
XMP #2 10.0-12-12-22-34-n.a @ 834 MHz (1.200 Volts)
XMP #3 11.0-13-13-24-37-n.a @ 917 MHz (1.200 Volts)
XMP #4 12.0-14-14-27-40-n.a @ 1000 MHz (1.200 Volts)
XMP #5 13.0-15-15-29-44-n.a @ 1084 MHz (1.200 Volts)
XMP #6 14.0-16-16-31-47-n.a @ 1167 MHz (1.200 Volts)
XMP #7 15.0-17-17-33-50-n.a @ 1251 MHz (1.200 Volts)
XMP #8 16.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #9 17.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #10 18.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #11 19.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #12 20.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
DIMM # 4
SMBus address 0x53
Memory type DDR4
Module format UDIMM
Module Manufacturer(ID) Corsair (7F7F9E0000000000000000)
SDRAM Manufacturer (ID) Micron Technology (2C00000000000000000000)
Size 8192 MBytes
Max bandwidth DDR4-2132 (1066 MHz)
Part number CMK16GX4M2A2666C16
Nominal Voltage 1.20 Volts
EPP no
XMP yes
XMP revision 2.0
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 9.0-9-10-22-31 @ 666 MHz
JEDEC #2 10.0-10-11-25-35 @ 740 MHz
JEDEC #3 11.0-11-12-27-38 @ 814 MHz
JEDEC #4 12.0-12-13-30-42 @ 888 MHz
JEDEC #5 13.0-13-14-32-45 @ 962 MHz
JEDEC #6 14.0-14-15-35-49 @ 1037 MHz
JEDEC #7 15.0-15-15-36-50 @ 1066 MHz
JEDEC #8 16.0-15-15-36-50 @ 1066 MHz
XMP profile XMP-2666
Specification DDR4-2666
Voltage level 1.200 Volts
Min Cycle time 0.750 ns (1333 MHz)
Max CL 16.0
Min tRP 13.49 ns
Min tRCD 13.49 ns
Min tRAS 26.11 ns
Min tRC 39.74 ns
Min tRRD 3.74 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-11-11-20-30-n.a @ 750 MHz (1.200 Volts)
XMP #2 10.0-12-12-22-34-n.a @ 834 MHz (1.200 Volts)
XMP #3 11.0-13-13-24-37-n.a @ 917 MHz (1.200 Volts)
XMP #4 12.0-14-14-27-40-n.a @ 1000 MHz (1.200 Volts)
XMP #5 13.0-15-15-29-44-n.a @ 1084 MHz (1.200 Volts)
XMP #6 14.0-16-16-31-47-n.a @ 1167 MHz (1.200 Volts)
XMP #7 15.0-17-17-33-50-n.a @ 1251 MHz (1.200 Volts)
XMP #8 16.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #9 17.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #10 18.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #11 19.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)
XMP #12 20.0-18-18-35-53-n.a @ 1333 MHz (1.200 Volts)