DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix

Re:DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix by brixon on Tuesday October 06, 2020 @09:27AM (#24697422)

"For bandwidth, other memory manufacturers have quoted that for the theoretical 38.4 GB/s that each module of DDR5-4800 can bring, they are already seeing effective numbers in the 32 GB/s range. This is above the effective 20-25 GB/s per channel that we are seeing on DDR4-3200 today."

That looks like a 20%+ improvement IF you are bottle-necking on DDR4.

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Re:DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix by Sebb767 on Tuesday October 06, 2020 @11:48AM (#24698999)

So, it's worth upgrading if you're running Redis or Dwarf Fortress :)

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Re:DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix by BeefySwain on Tuesday October 06, 2020 @01:48PM (#24700479)

My understanding is that Dwarf Fortress is memory LATENCY limited, not bandwidth. Definitely could be wrong though.

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Re:DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix by h-jones on Tuesday October 06, 2020 @12:55PM (#24699920)

How does this play in with the fact that the DDR5 is clocked at 4800mHz and the DDR4 is at 3200? Would we not expect a 50% improvement with respect to transfer rates with a 50% increase in clock? I really don't know.

There are even 4800mHz DDR4 DIMMs available now, even if they are niche.

EDIT: DDR4 is 3200 not 3800.

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