Dual Channel Memory issues with Z790 Steel Legend

Here is my system information. Currently using i9-13900KF with ASRock Z790 motherboard. RAM is Micron CMK64GX5M2B5200C40 DDR5-5200 (Corsair). Currently I can only get the two sticks to work in single channel mode and not dual channel.

DMI Processor
     manufacturer          Intel(R) Corporation
     model               13th Gen Intel(R) Core(TM) i9-13900KF
     clock speed          2970.0 MHz
     FSB speed          100.0 MHz
     multiplier          29.5x
     max clock speed          8500.0 MHz

Chipset
-------------------------------------------------------------------------

Northbridge               Intel Raptor Lake rev. 01
Southbridge               Intel Z790 rev. 11
Bus Specification          PCI-Express 5.0 (32.0 GT/s)
Graphic Interface          PCI-Express 4.0
PCI-E Link Width          x16 (max 16x)
PCI-E Link Speed          16.0 GT/s (max 16.0 GT/s)
Memory Type               DDR5
Memory Size               64 GBytes
Channels               2 x 32-bit
Memory Frequency          1795.6 MHz (1:18)
Memory Max Frequency          3733.3 MHz
CAS# latency (CL)          30.0
RAS# to CAS# delay (tRCD)     30
RAS# Precharge (tRP)          30
Cycle Time (tRAS)          57
Bank Cycle Time (tRC)          87
Row Refresh Cycle Time (tRFC)     287
Command Rate (CR)          2T
Uncore Frequency          4588.8 MHz
Memory Controller Frequency     897.8 MHz
Host Bridge               0xA700

DIMM #                    1
     SMBus address          0x50
     Memory type          DDR5
     Module format          UDIMM
     Module Manufacturer(ID)     Corsair (7F7F9E0000000000000000000000)
     SDRAM Manufacturer (ID)     Micron Technology (2C00000000000000000000000000)
     Size               32768 MBytes
     Max bandwidth          DDR5-5200 (2600 MHz)
     Max JEDEC          DDR5-4800 (2400 MHz)
     Channels          2
     Part number          CMK64GX5M2B5200C40
     Manufacturing date     Week 45/Year 22
     Nominal Voltage          1.10 Volts
     EPP               no
     XMP               yes, rev. 3.0
     AMP               no
     EXPO               no
JEDEC timings table          CL-tRCD-tRP-tRAS-tRC @ frequency
     JEDEC #1          22.0-23-23-43-65 @ 1333 MHz
     JEDEC #2          28.0-28-28-54-82 @ 1666 MHz
     JEDEC #3          30.0-30-30-58-88 @ 1800 MHz
     JEDEC #4          32.0-33-33-62-95 @ 1933 MHz
     JEDEC #5          36.0-37-37-70-106 @ 2166 MHz
     JEDEC #6          40.0-40-40-77-117 @ 2400 MHz
     JEDEC #7          42.0-40-40-77-117 @ 2400 MHz
XMP profile               XMP-5200
     Specification          Profile 1
     VDD Voltage          1.250 Volts
     VDDQ Voltage          1.250 Volts
     VPP Voltage          1.800 Volts
     Memory Controller Volt.     1.200 Volts
     Min Cycle time          0.384 ns (2600 MHz)
     Max CL               40.0
     Min tRP               15.36 ns
     Min tRCD          15.36 ns
     Min tRAS          29.57 ns
     Min tRC               44.93 ns
XMP timings table          CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
     XMP #1               22.0-22-22-43-65-n.a @ 1432 MHz (1.250 Volts)
     XMP #2               26.0-26-26-51-77-n.a @ 1692 MHz (1.250 Volts)
     XMP #3               28.0-28-28-54-82-n.a @ 1822 MHz (1.250 Volts)
     XMP #4               30.0-31-31-58-88-n.a @ 1953 MHz (1.250 Volts)
     XMP #5               32.0-33-33-62-94-n.a @ 2083 MHz (1.250 Volts)
     XMP #6               36.0-36-36-70-106-n.a @ 2343 MHz (1.250 Volts)
     XMP #7               40.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts)
     XMP #8               42.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts)
     XMP #9               46.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts)

DIMM #                    2
     SMBus address          0x51
     Memory type          DDR5
     Module format          UDIMM
     Module Manufacturer(ID)     Corsair (7F7F9E0000000000000000000000)
     SDRAM Manufacturer (ID)     Micron Technology (2C00000000000000000000000000)
     Size               32768 MBytes
     Max bandwidth          DDR5-5200 (2600 MHz)
     Max JEDEC          DDR5-4800 (2400 MHz)
     Channels          2
     Part number          CMK64GX5M2B5200C40
     Manufacturing date     Week 45/Year 22
     Nominal Voltage          1.10 Volts
     EPP               no
     XMP               yes, rev. 3.0
     AMP               no
     EXPO               no
JEDEC timings table          CL-tRCD-tRP-tRAS-tRC @ frequency
     JEDEC #1          22.0-23-23-43-65 @ 1333 MHz
     JEDEC #2          28.0-28-28-54-82 @ 1666 MHz
     JEDEC #3          30.0-30-30-58-88 @ 1800 MHz
     JEDEC #4          32.0-33-33-62-95 @ 1933 MHz
     JEDEC #5          36.0-37-37-70-106 @ 2166 MHz
     JEDEC #6          40.0-40-40-77-117 @ 2400 MHz
     JEDEC #7          42.0-40-40-77-117 @ 2400 MHz
XMP profile               XMP-5200
     Specification          Profile 1
     VDD Voltage          1.250 Volts
     VDDQ Voltage          1.250 Volts
     VPP Voltage          1.800 Volts
     Memory Controller Volt.     1.200 Volts
     Min Cycle time          0.384 ns (2600 MHz)
     Max CL               40.0
     Min tRP               15.36 ns
     Min tRCD          15.36 ns
     Min tRAS          29.57 ns
     Min tRC               44.93 ns
XMP timings table          CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
     XMP #1               22.0-22-22-43-65-n.a @ 1432 MHz (1.250 Volts)
     XMP #2               26.0-26-26-51-77-n.a @ 1692 MHz (1.250 Volts)
     XMP #3               28.0-28-28-54-82-n.a @ 1822 MHz (1.250 Volts)
     XMP #4               30.0-31-31-58-88-n.a @ 1953 MHz (1.250 Volts)
     XMP #5               32.0-33-33-62-94-n.a @ 2083 MHz (1.250 Volts)
     XMP #6               36.0-36-36-70-106-n.a @ 2343 MHz (1.250 Volts)
     XMP #7               40.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts)
     XMP #8               42.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts)
     XMP #9               46.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts)

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savi01 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 Dec 2022 Status: Offline Points: 15	Post Options Post Reply Quote savi01 Report Post Thanks(0) Quote Reply Posted: 11 Dec 2022 at 1:30pm
	I'm having the same problem, but with GSkill RAM. Individually each stick works in the A2 slot, but using A2/B2 together prevents post'ing. Any update?

plaguedemorte Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 08 Dec 2022 Status: Offline Points: 65	Post Options Post Reply Quote plaguedemorte Report Post Thanks(0) Quote Reply Posted: 08 Dec 2022 at 11:38am
	Here is my system information. Currently using i9-13900KF with ASRock Z790 motherboard. RAM is Micron CMK64GX5M2B5200C40 DDR5-5200 (Corsair). Currently I can only get the two sticks to work in single channel mode and not dual channel. DMI Processor manufacturer Intel(R) Corporation model 13th Gen Intel(R) Core(TM) i9-13900KF clock speed 2970.0 MHz FSB speed 100.0 MHz multiplier 29.5x max clock speed 8500.0 MHz Chipset ------------------------------------------------------------------------- Northbridge Intel Raptor Lake rev. 01 Southbridge Intel Z790 rev. 11 Bus Specification PCI-Express 5.0 (32.0 GT/s) Graphic Interface PCI-Express 4.0 PCI-E Link Width x16 (max 16x) PCI-E Link Speed 16.0 GT/s (max 16.0 GT/s) Memory Type DDR5 Memory Size 64 GBytes Channels 2 x 32-bit Memory Frequency 1795.6 MHz (1:18) Memory Max Frequency 3733.3 MHz CAS# latency (CL) 30.0 RAS# to CAS# delay (tRCD) 30 RAS# Precharge (tRP) 30 Cycle Time (tRAS) 57 Bank Cycle Time (tRC) 87 Row Refresh Cycle Time (tRFC) 287 Command Rate (CR) 2T Uncore Frequency 4588.8 MHz Memory Controller Frequency 897.8 MHz Host Bridge 0xA700 DIMM # 1 SMBus address 0x50 Memory type DDR5 Module format UDIMM Module Manufacturer(ID) Corsair (7F7F9E0000000000000000000000) SDRAM Manufacturer (ID) Micron Technology (2C00000000000000000000000000) Size 32768 MBytes Max bandwidth DDR5-5200 (2600 MHz) Max JEDEC DDR5-4800 (2400 MHz) Channels 2 Part number CMK64GX5M2B5200C40 Manufacturing date Week 45/Year 22 Nominal Voltage 1.10 Volts EPP no XMP yes, rev. 3.0 AMP no EXPO no JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency JEDEC #1 22.0-23-23-43-65 @ 1333 MHz JEDEC #2 28.0-28-28-54-82 @ 1666 MHz JEDEC #3 30.0-30-30-58-88 @ 1800 MHz JEDEC #4 32.0-33-33-62-95 @ 1933 MHz JEDEC #5 36.0-37-37-70-106 @ 2166 MHz JEDEC #6 40.0-40-40-77-117 @ 2400 MHz JEDEC #7 42.0-40-40-77-117 @ 2400 MHz XMP profile XMP-5200 Specification Profile 1 VDD Voltage 1.250 Volts VDDQ Voltage 1.250 Volts VPP Voltage 1.800 Volts Memory Controller Volt. 1.200 Volts Min Cycle time 0.384 ns (2600 MHz) Max CL 40.0 Min tRP 15.36 ns Min tRCD 15.36 ns Min tRAS 29.57 ns Min tRC 44.93 ns XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage) XMP #1 22.0-22-22-43-65-n.a @ 1432 MHz (1.250 Volts) XMP #2 26.0-26-26-51-77-n.a @ 1692 MHz (1.250 Volts) XMP #3 28.0-28-28-54-82-n.a @ 1822 MHz (1.250 Volts) XMP #4 30.0-31-31-58-88-n.a @ 1953 MHz (1.250 Volts) XMP #5 32.0-33-33-62-94-n.a @ 2083 MHz (1.250 Volts) XMP #6 36.0-36-36-70-106-n.a @ 2343 MHz (1.250 Volts) XMP #7 40.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts) XMP #8 42.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts) XMP #9 46.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts) DIMM # 2 SMBus address 0x51 Memory type DDR5 Module format UDIMM Module Manufacturer(ID) Corsair (7F7F9E0000000000000000000000) SDRAM Manufacturer (ID) Micron Technology (2C00000000000000000000000000) Size 32768 MBytes Max bandwidth DDR5-5200 (2600 MHz) Max JEDEC DDR5-4800 (2400 MHz) Channels 2 Part number CMK64GX5M2B5200C40 Manufacturing date Week 45/Year 22 Nominal Voltage 1.10 Volts EPP no XMP yes, rev. 3.0 AMP no EXPO no JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency JEDEC #1 22.0-23-23-43-65 @ 1333 MHz JEDEC #2 28.0-28-28-54-82 @ 1666 MHz JEDEC #3 30.0-30-30-58-88 @ 1800 MHz JEDEC #4 32.0-33-33-62-95 @ 1933 MHz JEDEC #5 36.0-37-37-70-106 @ 2166 MHz JEDEC #6 40.0-40-40-77-117 @ 2400 MHz JEDEC #7 42.0-40-40-77-117 @ 2400 MHz XMP profile XMP-5200 Specification Profile 1 VDD Voltage 1.250 Volts VDDQ Voltage 1.250 Volts VPP Voltage 1.800 Volts Memory Controller Volt. 1.200 Volts Min Cycle time 0.384 ns (2600 MHz) Max CL 40.0 Min tRP 15.36 ns Min tRCD 15.36 ns Min tRAS 29.57 ns Min tRC 44.93 ns XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage) XMP #1 22.0-22-22-43-65-n.a @ 1432 MHz (1.250 Volts) XMP #2 26.0-26-26-51-77-n.a @ 1692 MHz (1.250 Volts) XMP #3 28.0-28-28-54-82-n.a @ 1822 MHz (1.250 Volts) XMP #4 30.0-31-31-58-88-n.a @ 1953 MHz (1.250 Volts) XMP #5 32.0-33-33-62-94-n.a @ 2083 MHz (1.250 Volts) XMP #6 36.0-36-36-70-106-n.a @ 2343 MHz (1.250 Volts) XMP #7 40.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts) XMP #8 42.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts) XMP #9 46.0-40-40-77-117-n.a @ 2600 MHz (1.250 Volts)

plaguedemorte Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 08 Dec 2022 Status: Offline Points: 65	Post Options Post Reply Quote plaguedemorte Report Post Thanks(0) Quote Reply Posted: 08 Dec 2022 at 10:27am
	Hi, I'm having issues with support for Corsair Vengeance DD5 RAM with my Z790 Steel Legend WiFi. I've tried everything at this point. I have the latest (as of today) 4.01 version BIOS released on 2022/12/6. Currently my problem is when I try to run dual channel using the following RAM: Corsair Vengeance DDR5 64GB (2x32GB) 5200MHz OR CORSAIR Vengeance DDR5 32GB (2x16GB) DDR5 5600 (PC5-44800) I'm trying to just use either pair in dual channel mode. Currently the motherboard downsteps each stick to 3600mhz in single mode. Single mode currently is the only mode that works for me. I've tried slots A1/B1, A2/B2 combinations with no success. I've been hoping for a BIOS update to fix this but it doesn't seem to work. Anyone encounter this and have any success? I feel like this is compatibility issue at this point.