X299 OC RDIMM

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   I'm looking at the x299 OC because its got five electrically wired x8 slot to the CPU. Such a rad board!

I've got some ECC RDIMMs (I know i9 don't support ECC, but I don't mind having it simply be disable) i wanted to use in conjunction with it and the 7980XE. While digging through the specs I noticed that the x299 OC is the only x299 board that ASRock sells without RDIMM support listed on the tin. Is that a clerical error? Or is that an OC related design choice? Does the board quietly/unofficially support RDIMM?

Thanks all!

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haskellcurrying Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Feb 2018 Status: Offline Points: 4	Post Options Post Reply Quote haskellcurrying Report Post Thanks(0) Quote Reply Topic: X299 OC RDIMM Posted: 23 Feb 2018 at 9:29am
	I'm looking at the x299 OC because its got five electrically wired x8 slot to the CPU. Such a rad board! I've got some ECC RDIMMs (I know i9 don't support ECC, but I don't mind having it simply be disable) i wanted to use in conjunction with it and the 7980XE. While digging through the specs I noticed that the x299 OC is the only x299 board that ASRock sells without RDIMM support listed on the tin. Is that a clerical error? Or is that an OC related design choice? Does the board quietly/unofficially support RDIMM? Thanks all!

wardog Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447	Post Options Post Reply Quote wardog Report Post Thanks(0) Quote Reply Posted: 23 Feb 2018 at 11:19am
	Let me email the Techs and ask. I doubt it though. Why? Yea, I read your 5 x8 slots but that still leave me asking why. Registered mem is slower, so unless you have an actual need, which I highly doubt, why cripple that XE proc with it. Hang tight. Edited by wardog - 23 Feb 2018 at 11:22am

wardog Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447	Post Options Post Reply Quote wardog Report Post Thanks(0) Quote Reply Posted: 23 Feb 2018 at 11:22am
	Too, I just looked. Your 7980XE doesn't support ECC mem. What's the P/N of the Kit/sticks of RDIMM you have there?

haskellcurrying Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Feb 2018 Status: Offline Points: 4	Post Options Post Reply Quote haskellcurrying Report Post Thanks(0) Quote Reply Posted: 24 Feb 2018 at 2:46am
	Hey! Thanks for all your help! I'm not crazy worried about performance as much as I am worried about ram scalability. I'm not gaming or mining, but rather I am using this for deep learning/compute/blah blah blah. In that space 64gb, maybe 128GB if the density goes up and I re-buy a full kit doesn't leave much headroom. I currently have 2 x 64gb 2400Mhz Samsung made/branded LRDIMMs (M393A8K40B21-CTC) and plan on doubling that moving forward. As for ECC, while I know the i9 doesn't boot ECC, it would appear that the X299 OC (like many other boards) simply boots the RAM with ECC disabled: 1. CT8G4RFS4213 (4GA72D9RGV) 2. CT8G4RFS4213 (4GA12D9RGV) Are both listed as supported by the x299 OC and are both Registered ECC modules (RDIMMs). Edited by haskellcurrying - 24 Feb 2018 at 5:37am