AMD Ryzen 7 3700X & Ryzen 9 3900X review

Processors 196 Page 21 of 28 Published by


Performance - DDR4 System Memory

Performance System Memory: Memory Read Test

For our memory tests are split up in copy, write and latency. While we use 3200 MHz on the memory subsystem throughout the other tests and benchmarks, AMD supplied a 3600 MHz kit for this review. So on this page 3600 MHz results. You'll notice something interesting with the single die 8-core part in write performance. We'll talk about that in a second. 




You will have noticed that the Ryzen 3000 processors with up to 8 cores make use of one CPU die. Here the write performance is halved. According to AMD, this is normal behavior. They claim that client workloads do very little pure writing, so the CCD/IOD link is 32B/cycle while reading and 16B/cycle for writing. This allowed AMD to save power and area inside the package to spend on other, more beneficial areas.

Of course, we do disagree with that as a thesis at a certain level, the 7-zip compression, for example, shows a clear difference. This is the one thing about Ryzen 3000 up-to 8-cores (1 die) that I have some reservations about. Then again, 98% of our tests indeed do not seem hindered by this fact.



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