News Intel Posts XMP 3.0 DDR5 QVL for Alder Lake CPUs

[Admin]

New Intel document details DDR5 memory kits that have been valid for the latest 12th Generation Alder Lake processors.

Intel Posts XMP 3.0 DDR5 QVL for Alder Lake CPUs : Read more

 

[-Fran-]

Curious how there are no 6400MT/s kits as they're the equivalent to 3200MT/s

Regards.

 

[InvalidError]

Curious how there are no 6400MT/s kits as they're the equivalent to 3200MT/s

How so? The total width of a DDR5 DIMM (2x32b) is the same as DDR4 (1x64b), so DDR5-6400 is still twice as much total bandwidth, albeit with the possibility of addressing both halves of the DDR5 DIMM independently.

Even if such high-speed DIMMs existed, I doubt their pricing would make them popular options within the next couple of years.

 

[-Fran-]

How so? The total width of a DDR5 DIMM (2x32b) is the same as DDR4 (1x64b), so DDR5-6400 is still twice as much total bandwidth, albeit with the possibility of addressing both halves of the DDR5 DIMM independently.

Even if such high-speed DIMMs existed, I doubt their pricing would make them popular options within the next couple of years.

You missed the mark by quite a lot, lol.

Let me rephrase: DDR5 6400MT/s is the equivalent to DDR4 3200MT/s: double speed, double latency, about same effective delay of ~7ns. They went from 6000MT/s to 6600MT/s. It just reads weird to me, but nothing more than that.

Regards.

 

[acme64]

i thought the mobo manufacturers posted QVL's

 

[firerod1]

i thought the mobo manufacturers posted QVL's

I got corsair dominator platinum first edition 5200 and an asus z690-F, hopefully it runs at its lowest timings

 

[Alvar "Miles" Udell]

It's going to be interesting to see the performance difference in Adder Lake (and Ryzen 6000 series) from the top to the bottom of the RAM stack. For Ryzen and DDR4 it can be "dramatic" in SOME cases, while others not so much. And it will be interesting to see if Adder Lake suffers the same kind of penalties first generation Ryzen chips did as well.

 

[d0x360]

It's going to be interesting to see the performance difference in Adder Lake (and Ryzen 6000 series) from the top to the bottom of the RAM stack. For Ryzen and DDR4 it can be "dramatic" in SOME cases, while others not so much. And it will be interesting to see if Adder Lake suffers the same kind of penalties first generation Ryzen chips did as well.

All generations of Ryzen are greatly effected by memory speed and timings. I got an extra 14% performance out of my kit with a manual overclock and tighter timings. I'm still leaving performance on the table despite that. If I had a higher quality kit I could be running at 4600mt CL15.

Plus when you overclock the memory or use XMP/DOCP you also need to overclock the infinity fabric which gives you further gains..and if you don't you will end up losing performance because of the latency regardless of how good your ram oc and timings are.

These timings look terrible if you ask me but it's early days for high performance DDR5. I had expected they would have used DDR5 to not only increase m/t but also get timings down to crazy levels without needing to tweak 100 settings and run memtest86 over and over again..