Monday, October 25th 2021
Corsair Dominator Platinum RGB DDR5 leak, Alongside Details of Kingston's DDR5 Modules
We've already seen some official and some leaks of various DDR5 modules and now Corsair's Dominator Platinum RGB modules have leaked. Alongside the pretty pictures, we also now know that these will be 5200 MHz/MT/s modules with a timing of 38-38-38-84 and that they'll require 1.25 V at these settings. Corsair has carried over its Capellix LEDs and iCue support, although this was pretty much expected.
Details of three sets of DDR5 memory from Kingston have also leaked and it looks like the company will have at least three main SKUs. What we're looking at is the ValueRam series with bog standard JEDEC spec at 4800 MHz with a CAS latency of 40, the Fury Beast which will feature the same clocks, but improved an CAS latency of 38 and finally a higher clocked Fury Beast SKU at 5200 MHz which a CAS latency of 40. All three SKUs will come in single 16 GB modules or 32 GB kits.
Sources:
@momomo_us, @momomo_us
Details of three sets of DDR5 memory from Kingston have also leaked and it looks like the company will have at least three main SKUs. What we're looking at is the ValueRam series with bog standard JEDEC spec at 4800 MHz with a CAS latency of 40, the Fury Beast which will feature the same clocks, but improved an CAS latency of 38 and finally a higher clocked Fury Beast SKU at 5200 MHz which a CAS latency of 40. All three SKUs will come in single 16 GB modules or 32 GB kits.
39 Comments on Corsair Dominator Platinum RGB DDR5 leak, Alongside Details of Kingston's DDR5 Modules
As always, I'll join the game a few generations later when technology has matured, standard speeds and latencies have been set, and prices have fallen to acceptable levels - just like I did with DDR, DDR2, 3 and 4.Maybe you're right, we'll see.
To everyone: Let's not forget about DDR5's other improvements, like the 2x32 bit bus per channel (instead of 1x64), or the on-module voltage controller. I think these are all things that will need a lot of benchmarking, tweaking and supplemental technology (software) to be built to really shine, which definitely won't happen in the early generations.
Anandtech go a list of officially supported speeds from Intel, but please read their comments that goes with the image.
www.anandtech.com/show/16959/intel-innovation-alder-lake-november-4th/4
So if you want to go high clock, you need a board with only two DIMM slots, such as the Gigabyte Z690 Aorus Tachyon.
The reason I bring up that board specifically, is because Gigabyte has handily provided a list of what they've tested and at what clocks speeds for that board.
www.gigabyte.com/Motherboard/Z690-AORUS-TACHYON-rev-10/support#support-memsup
Considering the default DDR5 Voltage is 1.2V and they're pusing 1.5-1.55V to reach certain clocks and timings, it's not likely we're going to see anything close to what people are hoping for at stock Voltage or even slightly increased Voltage any time soon. The best 4800MHz modules have CAS latency of 36, with a 4000MHz Corsair kit hitting a CAS latency of 32, although oddly enough at 1.1V. On the other hand, 6600MHz at CAS 36 requires the aforementioned 1.55V and 7000MHz at CAS 40 is at 1.5V.
Anyhow, you can peruse the list at your own leisure and maybe you'll reach a different conclusion than me, but I don't believe we'll ever see CAS 20 at 4000MHz.
Then there's this. Lots more bandwidth, but then again, that's no surprise, but even at 6000MHz which should be CAS 40, DDR4 4800MHz has much better latency.
This is the kit they used :
www.gigabyte.com/at/Memory/AORUS--Memory-DDR5-32GB--2x16GB-5200MHz#kf
Also those looking at RAM may find this comparison of DDR4 and DDR3 at the Skylake launch of interest:
www.anandtech.com/show/9483/intel-skylake-review-6700k-6600k-ddr4-ddr3-ipc-6th-generation/7From what I gathered on the old DDR4/DDR3 review, it is, if we are talking about below DDR4-4000 kits. The increase in speed seems to be much higher. I seriously doubt someone running say DDR4-4266 C18 is going to be impressed though. Us peons with DDR4-3200 C16 will probably be quite happy.
It doesn't actually seem to be a real world issue though, but it does seem like speeds top out at around 6000-6200MHz even on higher-end boards that have more than two physical slots.
It also seems like either XMP has to be used, or you have to manually try and tweak things, as the system will automagically drop the speed if you use certain configurations of RAM.MSI seems to have different limitations compared to Gigabyte and this is their two DIMM board. Not QVL as yet.ASRock has next to zero modules in their QVL and haven't tested anything over 4800MHz in it.Asus has equally limited information at the moment, but the ROG Maximus Z690 Apex, which is also a two DIMM board claims similar speeds. Not memory QVL for any boards as yet.So far, it seems like Gigabyte has the lead, as they've tested the Z690 Aorus Tachyon up to 7000MHz.
Cezanne APUs scale to 4800 without breaking 1:1 IF if you use a dGPU, and they already start breaking the 50ns mark at only like 4133CL16. I'm already at 48ns @ 4333CL16 with 67GB/s R/W......
And then there's 4800 on Comet Lake which is in the 35ns range if not lower, with good bandwidth
I mean, yes the bandwidth for DDR5 looks to be in the right place, and latency looks decent (considering everything is just going to be desynced IMC like RKL going forward). That Copy number looks nice and consistent, real bandwidth should be good. But lordy this isn't how you do a comparison, with laughably unstable hardware.......
Bandwidth good, latency, not so much.