SiSoftware have just posted the first reviews for AMD's Zen 3 powered Ryzen 7 5800X 8 Core & Ryzen 5 5600X 6 Core CPUs. The AMD Ryzen 5000 Desktop CPUs launch next week but the team over at SiSofware decided to post a full review of the processors based entirely on their own CPU benchmark suite.

AMD Ryzen 7 5800X 8 Core & Ryzen 5 5600X 6 Core CPUs Reviewed By SiSofware, Up To 40% Performance Improvement With Zen 3 Over Zen 2

According to SiSoftware themselves, both AMD Ryzen 5000 Desktop CPUs were tested on an X570 test bed with the latest BIOS installed from the specific manufacturer. The review highlights some of the key differences between Zen 3 and Zen 2 processors and evaluates the processors through their own test suite which is quite comprehensive. The tests include arithmetic, SIMD and also the cryptography performance. Before we get into the test results, let's take a look at the specs & how Zen 3 Ryzen 5000 Desktop CPUs compare to their predecessors in terms of features.

AMD Ryzen 7 5800X "Zen 3" Desktop CPU - 8 Cores / 16 Threads Up To 4.7 GHz For $449 US

The AMD Ryzen 7 5800X is an 8 core and 16 thread CPU. This chip is marketed to be the best 8 core processor in the market for gamers with its impressive clock speeds of 3.8 GHz base and 4.7 GHz boost clocks. The chip features a total of 36 MB of cache and a TDP of 105W. The CPU is expected to be priced at $449.

AMD Ryzen 5 5600X "Zen 3" Desktop CPU - 6 Cores / 12 Threads Up To 4.6 GHz For $299 US

The AMD Ryzen 5 5600X is a 6 core and 12 thread CPU. This chip is marketed to be the best 6 core processor in the market for gamers with its impressive clock speeds of 3.7 GHz base and 4.6 GHz boost clocks. The chip features a total of 36 MB of cache and a TDP of 65W. The CPU is expected to be priced at $299.

Some of the main features that were highlighted by AMD for its Ryzen 5000 Zen 3 processors will include:

Claim +19% IPC overall improvement vs. ZEN2Higher base and turbo clocks +5-8%Still built around “chiplets” CCX (“core complexes”) but now of 8C/16T and 16MB L3 cache (still 7nm)Same central I/O hub with memory controller(s) and PCIe 4.0 bridges connected through IF (“Infinity Fabric”) (12nm)Still up to 2 chiplets on desktop platform thus up to 2x 8C (16C/32T 5950X)L3 is still the same 32MB but now unified (not 2x 16MB) still up to 64MB on 5950X20 PCIe 4.0 lanes2x DDR4 memory controllers up to 3200Mt/s official (4266Mt/s max)

Micro-architecturally there are more changes that should improve performance and security:

Control Flow Integrity & Shadow StacksMulti-Key Memory Encryption, e.g. individually encrypted VM memoryInter-core latencies reduced through shared L3 (8C and less); no more trips to memory to share dataAMD processors have thankfully not been affected by most of the vulnerabilities bar two (BTI/”Spectre”, SSB/”Spectre v4″) that have now been addressed in hardware.

AMD Ryzen 5000 Serie & Ryzen 4000 CPU Lineup (2023)