Question DDR5 DIMMs: dual rank? quad rank?

[80251]

It used to be with DDR4 high capacity DIMMs were dual rank, is the same true w/high capacity DDR5 modules? Considering DDR5 DIMMs start out at 24GiB size, are all DDR5 DIMMs dual rank? Are the biggest DDR5 sticks quad rank?

 

[beyondlogic]

It used to be with DDR4 high capacity DIMMs were dual rank, is the same true w/high capacity DDR5 modules? Considering DDR5 DIMMs start out at 24GiB size, are all DDR5 DIMMs dual rank? Are the biggest DDR5 sticks quad rank?

if your unsure check the manufacturers webpage kingston is quite good at it and from i can see not all high capacity are duel and quad rank.

you can check each kits spec page but its normally there high end kits like renegade that are duel rank or quad.

https://www.kingston.com/unitedkingdom/en/memory?memory=ddr5&kit_3=kit of 2|kit of 4

 

[thestryker]

Currently 8/16/24GB modules should all be single rank and everything above is dual rank. That should change at some point this year when 32Gb IC hits the market then some 32GB modules will be start being single rank. Once that happens then you'd need to double check when buying anything 32GB capacity.

 

[80251]

For DDR4 I've read that dual rank has some perf. advantages over single rank, but single rank can usually clock higher. Is there any advantage/disadvantage to single rank vs. dual rank for DDR5?

 

[thestryker]

Single rank clocks much higher and has better latencies (ex: best dual rank you can get is 6800/CL32). I don't recall the technical reason for the dual rank advantage on AMD with DDR4, but to my knowledge no such thing exists on any DDR5 platform.

 

[beyondlogic]

View: https://www.youtube.com/watch?v=PxWQM4g99Cs


only video i could find really its not as much as ddr4. thats mainly because ddr5 can just blow the doors off.

the only one that im aware gets a decent uplift on amd mainly in 1 percent lows from my own experiance is am4 zen 3 and even then its game dependant. and resolution of 1080p from what ive seen its more profound.