CORSAIR Teases DDR5-6400 Memory Coming Later This Year

[Prima.Vera]

at DDR5-6400, the chips on the board will run at the same speed than DDR4-3200, but it will have twice the bus Bandwidth to transfert the data. That decoupling happened with all of the DDR generation.


the memory timing are tied to the bus speed. so at DDR5-6400, a CL of 32 is the equivalent of a DDR4-3200 CL16. The memory will response as fast with both settings but the DDR5 will have twice the bus bandwidth.

So for people that are maniac of timing, they think that DDR5 will be slower because of that. But overall, DDR5 will deliver twice the bandwidth with similar timings and we will see faster memory down the road. The fact that each DIMM have it's own voltage controller will probably even help memory overclocker and stuff.

Isn't the bandwidth of DDR4-3200 already large enough to feed a GPU raw data on a 4K game, for example? I'm just curious how will DDR5 will improve gaming performance, and not just server and database apps...

 

[Chrispy_]

Isn't the bandwidth of DDR4-3200 already large enough to feed a GPU raw data on a 4K game, for example? I'm just curious how will DDR5 will improve gaming performance, and not just server and database apps...

Yes, or at least there's enough bandwidth in dual-channel mode that more bandwidth doesn't make much difference.

The consumer situations that will really benefit from more bandwidth are integrated graphics, and all of those laptops and prebuilts sold with single-channel RAM.

 

[Tomorrow]

Memory makers will always quote the bandwidth of a single DIMM when discussing a new generation of memory, because quoting dual channel numbers wouldnt be accurate if the end user had, say, a HDET platform with quad channel memory.

Yes because quoting single channel number is extremely relevant considering that most people who want maximum performance run dual channel. Most kits are sold as two sticks and dual channel. HEDT is <1% of buyers so its not much of a concern. Especially as HEDT buyers are more likely enthusiasts who know exactly what they are buying.

Im talking about quoting common numbers and dual channel is by far the most common memory configuration on desktop PC's. That would be like manufacturers only quoting JEDEC speeds despite the fact that XMP exists and most users enable it.