Longsys / Lexar publishes its DDR5 memory performance data

[HEXUS]

Chinese electronics co tests its DDR5 32GB 6400 modules in Ludashi and AIDA64.

Read more.

[Corky34]

Is that latency something to do with Alder Lake? That L3 latency is what I'd expect from RAM not from a cache.

[Gentle Viking]

I still have a couple of DDR sticks, with 5-2-2-2-1 timings.

[Ripcord]

Is DDR5 the new RDram?

[edmundhonda]

That is more than double the benchmark score for Longsys DDR4 32GB C22[/url].

Probably 3200cl22, since that's JEDEC. 3200cl16 in a current platform will get ~45gb/s read/write/copy so the testing platform isn't producing competitive numbers. They might be accurate in terms of comparing DDR4 vs DDR5, but it might not be!

[Gentle Viking]

I am shooting for DDR5 in the next board / CPU / RAM upgrade, but it will probably end up as a whole system upgrade ( minus case and PSU / keyboard /mouse / screen )

[een4dja]

Let's hope DDR5 evolves rapidly because those AIDA64 memory bench numbers are horrible or there's an issue with the A0 engineering sample they're using. Here's my own DDR4-4000 number for comparison, a kit that's 4 years old now:

[maxopus]

I'm more interested in ECC than the increased speed that really only makes a tiny difference outside of benchmarks. I might upgrade when we get DDR70 with its 400EB/s speeds and 25 minute latency.

[six_tymes]

DDR5 platforms cant come soon enough. I mean come on already PHONES use it for almost a year now. and don't give me bs saying its different, phone DDR5 is still based on the same basic tech. The fact is, DDR5 was suppose to be out for consumer platforms in 2017. get on with it already!!!

[Corky34]

DDR5 platforms cant come soon enough. I mean come on already PHONES use it for almost a year now. and don't give me bs saying its different, phone DDR5 is still based on the same basic tech. The fact is, DDR5 was suppose to be out for consumer platforms in 2017. get on with it already!!!

Slight correction there, JEDEC originally had 2018 as their target date, the LPDDR (the stuff used in phones) standard was finalised almost a year and a half (2019) before they settled on a standard for normal DDR5 (middle of last year iirc).

Either way i wouldn't expect much advantage to running DDR5 on desktops when it first becomes available, in fact if those latency numbers don't come down it could even be a regression. (that is unless you've got a need for lower power draw or workloads that favour memory bandwidth over latency (RAM disk anyone))

[DanceswithUnix]

Slight correction there, JEDEC originally had 2018 as their target date, the LPDDR (the stuff used in phones) standard was finalised almost a year and a half (2019) before they settled on a standard for normal DDR5 (middle of last year iirc).

I wouldn't bother, this person seems obsessed with DDR5, yet doesn't seem to understand that there are different and basically unrelated standards that just happen to have the letters "DDR" in them.

Good job they haven't heard about GDDR6

[badass]

I wouldn't bother, this person seems obsessed with DDR5, yet doesn't seem to understand that there are different and basically unrelated standards that just happen to have the letters "DDR" in them.

Good job they haven't heard about GDDR6

I've assumed for a while that LPDDRx is a soldered on type standard whilst regular DDRx is socketed and so quite different. SO I also assume that they are quite different in very many ways. I'm probably wrong.

[DanceswithUnix]

I'm probably wrong.

AIUI you are quite right. They use narrower channel widths and a different burst configuration at lower voltage aimed at energy conservation. Basically, they are targeting mobile phones.