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Measuring The Performance Cost To AMD Memory Guard With Ryzen AI PRO CPUs
While the AMD Ryzen AI Max+ PRO 395 and Ryzen AI Max+ 395 are very similar processors just as the Ryzen PRO processors are to other non-PRO parts, one of the differences with the AMD PRO Technologies come down to AMD Memory Guard providing full system memory encryption.
With not too often having the Ryzen "PRO" variants in the lab at Phoronix for testing, while having the HP ZBook Ultra G1a review sample in for testing with the Ryzen AI Max+ PRO 395 flagship SoC, I was curious to measure the AMD Memory Guard performance impact. Contrary to the few data points in the whitepaper, I was able to find a number of workloads where the full DRAM encryption did provide a measurable impact but overall it wasn't that costly of a feature for the added security benefits. And considering all of the other out-of-the-box Strix Halo tests to date on Phoronix with the HP ZBook Ultra G1a laptops were with this AMD Memory Guard feature enabled, Strix Halo still delivers very robust performance with or without AMD Memory Guard.
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