Existing Alder Lake processor samples run faster with DDR4 than DDR5

According to rumors, future Intel Alder Lake processors will support two RAM standards: both the new DDR5 and the current DDR4. Information found in the UserBenchmark database indicates that Alder Lake currently performs better with the current DDR4 standard than with the new DDR5.

Image source: Intel

Image source: Intel

The Alder Lake sample shown in this test, which allowed us to compare performance with different memory, was equipped with 16 cores and 24 virtual threads. Recall that the 12th generation Intel Core processors use large Golden Cove cores and small Gracemont cores, but only the former support Hyper-Threading technology. Thus, the aforementioned processor has eight Golden Cove and Gracemont cores in its arsenal.

Together with Alder Lake, in the test system with the new standard memory, we used two 8 GB DDR5-4800 modules on Micron chips with model number C8C1084S1UC48BAW. A web search for this name did not return any results. But if these memory modules are JEDEC certified, then most likely they have a CAS Latency (CL) of 40. The DDR4 platform was equipped with a pair of Kingston HyperX Fury DDR4-3200 modules of 8 GB each. A search by their model number HP37D4U1S8ME-8XR also yielded nothing, that is, most likely this memory is used by some OEM manufacturer.

Image source: Tom's Hardware

Image source: Tom’s Hardware

In the read / write test, Alder Lake with DDR4-3200 memory showed 24% and 20% better performance compared to DDR5-4800. In the mixed test, the memory of the current DDR4 standard also turned out to be 5% faster. However, the difference in performance in single-threaded tests was not so significant. In the read speed test, everything turned out to be unchanged, but when writing and in the mixed test, DDR5-4800 showed 4 and 1% higher results.

Curiously, the advantage of DDR5-4800 memory was revealed in latency tests, where it outperformed DDR4-3200 by 36%.

The 16-core Alder Lake appears in the UserBenchmark database for the second time. The last sample showed a base frequency of 1.8 GHz. Boost frequency of the chip was 3.65 GHz. The last time in the test, a sample was noted with the same base frequency, but with a lower peak operating frequency at 3.05 GHz. Based on the number of cores, both cases probably involved preliminary samples of the flagship Core i9-12900K or Core i9-12900.

About the author

Dylan Harris

Dylan Harris is fascinated by tests and reviews of computer hardware.

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