Alder Lake-S Core i9-12900K leak suggests performance might be underwhelming

A few days ago at its Architecture Day 2021 event, Intel, among other things, discussed its upcoming Alder Lake CPU architecture that will feature a big.LITTLE core design similar to Arm processors. Intel is calling this approach the Performance Hybrid architecture, and it is said to be optimized really well to work with Microsoft's next-gen Windows 11 OS.

In terms of performance, Intel is promising instructions per cycle (IPC) improvement of around 19% over the previous-gen Rocket Lake-S processors across a wide variety of benchmarks.

Intel Alder Lake IPC vs Rocket Lake

Purported performance leak related to the 16-core, 24-thread (16C/24T) flagship Alder Lake-S desktop processor - dubbed the Core i9-12900K (8 P-core, 8 E-core) - have also appeared previously where it was claimed that the Intel processor was easily besting the 16C/32T Ryzen 9 5950X in Cinebench R20 in Intel's internal testing.

Today, a real-world application test in the form of Adobe After Effects was spotted by Twitter leakster Benchleaks in Puget Systems' PugetBench database.

A total of three tests using the i9-12900K has been discovered by VideoCardz and these were tested on an ASUS ROG STRIX Z690 motherboard, paired with a GeForce RTX 3090. For comparison, a recent 8C/16T Rocket Lake-S Core i9-11900K result was also dug up with a near-identical system. The motherboard and memory were different as the 11900K was running on a DDR4-2133 dual-channel 64GB system while the new 12900K had DDR5-4800 dual-channel 64GB.

The difference in the memory speeds is reflected in the After Effects' (AE) RAM Preview score. However, it should be noted that AE is much more sensitive to RAM capacity rather than speed. Hence the final render score isn't hugely influenced by the higher RAM preview on the Alder Lake-S machine.

Among the three test results of the Core i9-12900K mentioned earlier, the best Render Score is around 11.5% faster than the 11900K's result. (click on the result images below to enlarge)

PugetBench 11900K After Effects

PugetBench Core i9-12900K After Effects performance leak

PugetBench Core i9-12900K After Effects performance leak

PugetBench Core i9-12900K After Effects performance leak

While the performance seen here is far lower than Intel's claim of 19% IPC gains, it should be noted that the clock speeds are completely unknown. However, previous rumors have suggested that Alder Lake-S is also able to clock just as high as Rocket Lake-S; and in that case, the results may be somewhat disappointing, at least for AE users, if these were being run at the potential final retail speeds suggested by such rumors.

via VideoCardz

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