Taichi Razer z690 RAM Slot Issues

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   As stated having these issues on the Taichi z690 (basically z690 Taichi Carrera)
F5-6400J3239G32GX2-TZ5RK is the RAM kit I have.

G.SKILL Trident Z5 RGB Series 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6400 (PC5 51200) Desktop Memory Model F5-6400J3239G32GX2-TZ5R

It only trains and works in slots 1&3.  In 2&4 it will boot but will not train and instantly crashes anything that tries to use the RAM.  I verified this all with MEMTEST as well, it only passes with this kit in slots 1&3, not 2&4.  This is confusing because the manual states that slots 2&4 are preferred for dual-channel configurations.

Any one have any idea why?

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twisted Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Jul 2023 Status: Offline Points: 115	Post Options Post Reply Quote twisted Report Post Thanks(0) Quote Reply Topic: Taichi Razer z690 RAM Slot Issues Posted: 02 Jul 2023 at 2:40am
	As stated having these issues on the Taichi z690 (basically z690 Taichi Carrera) F5-6400J3239G32GX2-TZ5RK is the RAM kit I have. G.SKILL Trident Z5 RGB Series 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6400 (PC5 51200) Desktop Memory Model F5-6400J3239G32GX2-TZ5R It only trains and works in slots 1&3. In 2&4 it will boot but will not train and instantly crashes anything that tries to use the RAM. I verified this all with MEMTEST as well, it only passes with this kit in slots 1&3, not 2&4. This is confusing because the manual states that slots 2&4 are preferred for dual-channel configurations. Any one have any idea why?

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 25073	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 02 Jul 2023 at 6:31am
	Could be a faulty memory channel on the CPU. If you have any other RAM to verify with (in slots 2 and 4) it would help rule out a compatibility issue. I don't see how it could be incompatible RAM though if it's working as it should in slots 1 and 3. It may be worth trying a BIOS update if one is available that is newer than your current version. Failing that, I would RMA that CPU just to be on the safe side and rule out a marginal/bad IMC on the CPU.


twisted Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Jul 2023 Status: Offline Points: 115	Post Options Post Reply Quote twisted Report Post Thanks(0) Quote Reply Posted: 02 Jul 2023 at 6:37am
	It turns out the ram for some reason isn't fully compatible. I tried this kit since microcenter nearby had it and corsair listed it as compatible for the Taichi z690 even though ASROCK doesn't. https://www.microcenter.com/product/647391/corsair-dominator-platinum-rgb-64gb-(2-x-32gb)-ddr5-5200-pc5-41600-cl40-dual-channel-desktop-memory-kit-cmt64gx5m2b5200-black And it worked in slots 2&4, passed memtest and no crashes in games or apps. My only guess is the ram was running in some weird single channel mode in 1&3? It's really weird that it passed test in only those slots. Would be nice to get some feedback from ASROCK about this.

twisted Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Jul 2023 Status: Offline Points: 115	Post Options Post Reply Quote twisted Report Post Thanks(0) Quote Reply Posted: 02 Jul 2023 at 6:39am
	I'd also add now that I think about it, it kept retraining every time I booted up.