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In letter : We’re only weeks away from Alder Lake’s official reveal, so it’s no surprise that more leaks are appearing online. The latter seems to suggest that the 12th generation Intel processors will have a rugged memory controller that will allow enthusiasts to push DDR5 memory higher than DDR4.
We’ve seen a slew of Alder Lake leaks lately, but most were related to the performance of the upcoming Intel Core i9-12900K processor compared to AMD’s Ryzen 9 5950X, which is the current performance king. The Core i9-12900K, at least in its early incarnations, seems like the best desktop part to come out of Team Blue’s lab for some time, but there are still too many unknowns to make a clear judgment on its potential.
There has been a lot of speculation around DDR5 and its influence on Alder Lake’s performance in specific scenarios such as gaming. The new processors will support both DDR4 and DDR5, and most of the leaks we’ve seen so far have come from a Core i9-12900K paired with DDR5 memory.
If a new leak from a Twitter user REHWK is valid, Alder Lake processors will come with a rugged memory controller which will be a gift for enthusiasts who like to push RAM to the limit. In the CPU-Z screenshot shared by the leaker, we also get further confirmation of the general specifications of the Core i9-12900K, a 16-core, 24-thread part with a TDP rating of 125 watts and no AVX-512 support. .
DDR5 8000 !!!!!!!!
with Z690 AORUS tachyon and i9-12900K (?)@tomshardware @TechSpot @VideoCardz @wccftech @TechPowerUp pic.twitter.com/TrHD5Amg4L– REHWK (@hw_reveal) October 1, 2021
In this new leak, the Alder Lake part appears to be associated with Gigabyte’s DDR5-6200 memory kit on a Z690 Aorus Tachyon motherboard. By default, DDR5-6200 memory will operate at DDR5-4800 speeds per the JEDEC specification, with 42-39-39-77-116 timings at 1.1 V. Under the XMP-6200 profile, the timings are a little tighter to 38-38-38-76-125, but the working voltage is increased to 1.5V for stable operation. Otherwise, there is another XMP-6400 profile with more flexible timings and an operating voltage of 1.45 V.
To put it in context, one cool feature that debuted with Rocket Lake is Gear Modes, which are Intel’s answer to AMD’s Infinity Fabric modes for memory overclocking. Gear 1 lets you run the memory controller and the memory itself at the same frequency, while Gear 2 and Gear 4 let you run them at different frequencies. In the case of Gear 2, the memory controller operates at half the memory frequency, and the latter mode allows the memory controller to operate at a quarter of the memory frequency.
Alder Lake is expected to have this feature as well, and this new leak suggests that the memory controller in the new processor line allows memory overclocking up to 67% on DDR5-8000 from the DDR5-4800 specification, with timings set to 50-50 -50-100-150 for CL, tRDC, tRP, tRAS and tRC, respectively. Notably, the overclocker achieved this by using Gear 2 mode, which means that the memory controller runs at around 2000 MHz, while the memory runs at 4000 MHz (effective speed of 8000 MHz). At the time of writing, DDR4’s overclocking record sits at 7156 MHz, so this leak suggests that DDR5 should be able to hit more than that right off the bat.
All in all, it’s an impressive feat that likely required some exotic cooling to be successful. This shouldn’t be read too much, as we haven’t yet seen exactly what speed advantage DDR5 brings over DDR4 and whether or not it will be worth the extra price you will have to pay for the privilege. At least one manufacturer is planning to go beyond the 10,000 MHz barrier with overclocked modules, so it will be interesting to see what DDR5 has in store.
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