Single and dual channel at the same time?

I'm having issues with fps drops with game if I use the four banks, my 4 memories are the same model but as it seems not the same batch, but it was working fine until sometime ago.

I tried changing slots and got some interesting results, like it boots once, then the computer hangs or some banks got in dual channel and just one and the other ones got single channel.

I updated the bios the last version but is beta and there are no new releases. When I installed the memories, I had no issues, it started couple of months back.

Seemed more stable when running with 3 sticks



mobo GA-Z97X-Gaming 3 (rev. 1.0) / i7 4790

Report from CPU-Z


DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E0000000000000000)
Size 4096 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number CMV4GX3M1A1333C9
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-17-22 @ 457 MHz
JEDEC #2 7.0-7-7-20-26 @ 533 MHz
JEDEC #3 9.0-9-9-24-33 @ 666 MHz

DIMM # 2
SMBus address 0x51
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E0000000000000000)
Size 4096 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number CMV4GX3M1A1333C9
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-17-22 @ 457 MHz
JEDEC #2 7.0-7-7-20-26 @ 533 MHz
JEDEC #3 9.0-9-9-24-33 @ 666 MHz

DIMM # 3
SMBus address 0x52
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E0000000000000000)
Size 4096 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number CMV4GX3M1A1333C9
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-23 @ 444 MHz
JEDEC #2 8.0-8-8-22-30 @ 592 MHz
JEDEC #3 9.0-9-9-24-34 @ 666 MHz

DIMM # 4
SMBus address 0x53
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E0000000000000000)
Size 4096 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number CMV4GX3M1A1333C9
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-23 @ 444 MHz
JEDEC #2 8.0-8-8-22-30 @ 592 MHz
JEDEC #3 9.0-9-9-24-34 @ 666 MHz


Any ideas what may have started the issue?