Dual Channel Memory issues with Z790 Steel Legend

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   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.

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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 Topic: Dual Channel Memory issues with Z790 Steel Legend 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.

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)

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: 11 Dec 2022 at 2:51pm
	Still having the same issue. Trying to use the RAM in A1,B1 or A2,B2 results in no POST. Using the latest BIOS also v4.01.

Militaryfool280 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 31 Dec 2022 Status: Offline Points: 15	Post Options Post Reply Quote Militaryfool280 Report Post Thanks(0) Quote Reply Posted: 31 Dec 2022 at 2:48am
	Was having the same issues with Corsair's Dominators 32gb.. But placed both in b1 and b2 and got the PC to boot. When I checked in task manager said that had 32gb of ram available and 2 of 4 channels were in use.

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: 31 Dec 2022 at 4:28am
	I'm currently using BIOS version 5.02 (2022/12/22) and still experiencing problems.

jmcdevi3 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 08 Jan 2023 Status: Offline Points: 30	Post Options Post Reply Quote jmcdevi3 Report Post Thanks(0) Quote Reply Posted: 08 Jan 2023 at 3:23am
	I?�m having the same issue on Z790 PG Riptide, will boot with one stick of Corsair DDR5-5600 in slot B2, or two sticks in B1 and B2 (single channel) but if I put one in A2 and one in B2 it won?�t post and the DRAM light is red. After it fails to post and I remove one stick and reboot the speed is dropped to 3600. I?�ve updated BiOS to 4.13, and tried with XMP profile enabled. Seems like a lot of ASRock Z790 boards are having memory issues? Intel i7-13700KF Corsair 2 x 16GB DDR5-5600 Z790 PG Riptide

Les Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 Dec 2015 Status: Offline Points: 28	Post Options Post Reply Quote Les Report Post Thanks(0) Quote Reply Posted: 23 Jan 2023 at 3:00am
	EXACTLY SAME PROBLEM! on new Z790 Taichi with i5-13600K CPU with both Corsair DDR5-5200 Plat Dom 64GB and Corsair DDR5-5600 Plat Dom 32GB which is brand new. Nothing will work in A slots whatsoever which means A1-B1 or A2-B2 (Dual Channel) will not work. I can only get all to work in B1-B2 and then can get it to work at proper speed. I have tried removing and reseating the CPU and also upgrading to latest BIOS. Very very frustrating and obviously not alone here. UPDATE: Just tried Kingston Fury 7200 16GB same issue and then moved all over to my other machine and this is not the memories fault.I am also going to believe its not the CPU as there are no CPU error messages and everything works fine (in single mode) with ANY memory in B1-B2. What kind of a performance hit would that be? FURTHER UPDATE: Just tried things with my i9-12900K CPU and same problem exists. THIS IS A MOTHERBOARD ISSUE

jmcdevi3 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 08 Jan 2023 Status: Offline Points: 30	Post Options Post Reply Quote jmcdevi3 Report Post Thanks(0) Quote Reply Posted: 23 Jan 2023 at 3:41am
	Unfortunately, after all known troubleshooting efforts I ultimately RMA?�d the Z790 Riptide and got an ASUS board instead, booted up first try with same CPU and RAM in dual channel, no issues.

crn1710 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 07 Feb 2023 Status: Offline Points: 15	Post Options Post Reply Quote crn1710 Report Post Thanks(0) Quote Reply Posted: 07 Feb 2023 at 12:15am
	Just registered to post this: I've got almost the same issues with the Z790 Steel Legend WiFi. I can boot into Windows just fine but after ~10 minutes I get constant c0000005 errors with apps and games just exiting to desktop and even BSOD. Unable to install DirectX Runtimes for some reason. Unable to install ANY Nvidia driver, old or new. RAM is 2x G.Skill Trident Z5 RGB (F5-6000J3636F16GX2-TZ5K), which is said to be supported by this MB. So I said ... let's buy 32GB of the same RAM, maybe mine is broken . Brand new RAM (same make) and guess what - it still doesn't work. Asrock support told me to RMA to my dealer. Dealer said it'll take 4-6 weeks and they cannot replace the MB. Bought an ASUS now. Works like a charm. No more ASRock for me.