AMD Rembrandt CPU Review

It has become a tradition for AMD to launch a new generation of its Ryzen APUs every year, which since the 4000 series have taken as their main market that of laptops where they currently compete against the Tiger Lake. The next generation (and its first benchmarks) under the codename Rembrandt has already been seen at both iGPU and CPU scale.

Looking to the next generation of their APUs, Lisa Su’s have taken a different path than the Ryzen 5000H, 5000U and 5000G series for desktop, since they left all the elements intact except the CPU that they upgraded to Zen 3. Instead in Rembrandt they are going to leave intact the CPU that will continue to be based on Zen 3, but with important changes in the elements that surround it.

Among the changes that are expected are the use of an integrated GPU with RDNA 2 architecture , this being the first time it has been implemented on PC after its implementation in the SoCs of the Xbox Series, PS5 and Steam Deck consoles .

So it will be AMD’s first change in this regard since the first generation Ryzen APUs. Nor can we forget the support for DDR5 and LPDDR5 memories . It will be manufactured under TSMC’s 6nm node, a derivative of the 7nm node that offers the same power and speed specifications but with an additional 18% density.

First benchmarks from AMD Rembrandt

First of all, we must clarify that these results of these first benchmarks of the AMD Rembrandt APU have been taken from a sample uploaded to the Userbenchmarks database, a benchmark famous for giving an excessive advantage to Intel CPUs over any other. What has happened is that someone has published the result of a processor with the code 100-000000518-41_N that is supposed to be an AMD Rembrandt APU.

Surprisingly in the results the Ryzen 7 5800H has obtained scores that put it 19% above the Mystery APU in the single-core test and up to 18% in the 8-core test . Since they both use the same architecture, Zen 3, the explanation for the lower results is that the new SoC makes use of a CPU at a lower clock speed. Nor can we rule out the fact that the test has been done using a single DDR5-4800 C40 memory SO-DIMM module and therefore with half the memory channels available , which is quite a significant bottleneck.

Due to the nature of Userbenchmarks we will not give importance to the Intel CPU, but will take this information as a demonstration that the Rembrandt APU has already been finished, the first pre-build samples have been manufactured and are being put to the test.

The iGPU has also been put to the test

The GPU integrated in the AMD Rembrandt APU will be of RDNA 2 architecture, we do not yet know the number of Compute Units that will compose it or its clock speed, but we believe that it will be the same design that Valve will implement in its Steam Deck. In this case the iGPU is codenamed 1 CFA 0004 .

Your performance? It achieves lighting, reflection and gravity graphics performance tests that are above the Intel Iris Xe DG1 integrated GPU by 25% , 382% and 7% respectively . Being the only benchmark where the Rembrandt APU GPU has had problems with the MRender.

The change in graphics architecture in the following APUs from AMD not only allows it to outperform the small dedicated GPU for Intel’s entry-level ranges, but also the already veteran NVIDIA GeForce MX350. Where in the test lighting it is placed 19% above, 392% in the reflection and 39% in the Gravity.

A sample of how AMD is going to arrive pushing well into 2022, because they will (presumably) be presented at CES 2022. What do you think of these first benchmarks of AMD Rembrandt APUs?

by Abdullah Sam
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