AMD Ryzen 7 5800X3D review

Processors 199 Page 2 of 26 Published by

teaser

Ryzen processor family

Ryzen Series 5000 for Desktop

The Ryzen 7 5800X3D is part of the Zen 3 iteration. The 5800X3D will include a 3D cache, (an added chip holding 64MB inside the processor package) which will significantly expand cache capacity while maintaining access speeds. The Ryzen 7 5800X3D's characteristics are as follows.

  • 8 cores
  • 16 threads
  • Boost clock 4.5GHz
  • Base clock 3.4GHz
  • L1 cache 512KB
  • L2 cache 4MB
  • L3 cache 96MB
  • Default TDP 105W
  • Socket AM4

The cache of a CPU is effectively an extension of the system's RAM, serving as a backup for memory transfer. In today's CPU design, the cache is typically divided into three tiers. The following table summarizes the cache levels:

L1 - L2  - L3

Level one cache is integrated into the CPU and is located closest to the CPU's cores. It provides lightning-fast access rates but has the lowest capacity. This is designated for the CPU's most frequently accessed important data. Level two cache is an excellent compromise, with a median capacity and performance, and is designated for less critical material. The third level cache is where the majority of your frequently used data, such as programs and execution pathways, are kept. This level has the most capacity in contrast to the other two but is also significantly slower.

AMD thus added 64MB of 3D Cache, what's that you might wonder?

A 2D cache is the usual cache found on modern CPUs. It is layered laterally using silicone dies to maximize the amount of area available for each cache chiplet. The disadvantage of stacking each cache chiplet horizontally is that it necessitates a vast amount of surface area, greatly restricting the number of chiplets that can fit into a footprint. However, with a 3D cache, all of this changes for the better. Due to the fact that the 3D cache is not stacked horizontally but vertically, the name "3D cache" was coined. This significantly increases the number of chiplets that can be crammed into a given region of any size, resulting in significantly greater cache capacities without compromising access speed due to the chiplets being part of the same block.


 

AMD RyzenArchitectureCore/ThreadBase clock speedBoost clock speedCache (L2+L3)PCIe lanes (Gen 4 CPU+Pch)TDPPrice
9 5950X 7nm Zen 3 (Vermeer) 16/32 3.4GHz 4.9GHz 72MB 24 + 16 105W $799
9 5900X 7nm Zen 3 (Vermeer) 12/24 3.7GHz 4.8GHz 70MB 24 + 16 105W $549
Ryzen 9 5900 7nm Zen 3 (Vermeer) 12/24 3GHz 4.7GHz 64MB 24 + 16 65W $499 US
7 5800X3D 7nm Zen 3D 'Warhol' 8/16 3.4GHz 4.5GHz 64MB + 32MB 24 + 16 105W $449
7 5800X 7nm Zen 3 (Vermeer) 8/16 3.8GHz 4.7GHz 36MB 24 + 16 105W $449
7 5800 7nm Zen 3 (Vermeer) 8/16 3.4GHz 4.6GHz 32MB 24 + 16 65W $399
7 5700X 7nm Zen 3 (Vermeer) 8/16 3.4GHz 4.6GHz 36MB 24 + 16 65W $299
7 5700 7nm Zen 3 (Cezanne) 8/16 - - 20MB 20 (Gen 3) + 16 65W -
5 5600X 7nm Zen 3 (Vermeer) 6/12 3.7GHz 4.6GHz 35MB 24 + 16 65W $299
5 5600 7nm Zen 3 (Vermeer) 6/12 3.5GHz 4.4GHz 35MB 24 + 16 65W $199
5 5500 7nm Zen 3 (Cezanne) 6/12 3.6GHz 4.2GHz 19MB 20 (Gen 3) + 16 65W $159
5 5100 7nm Zen 3 (Cezanne) 4/8 - - - 20 (Gen 3) + 16 65W -
7 4700 7nm Zen 2 (Renoir) 8/16 3.6GHz 4.4GHz 20MB 20 (Gen 3) + 16 65W -
5 4600G 7nm Zen 2 (Renoir) 6/12 - - 11MB 20 (Gen 3) + 16 65W $154
5 4500 7nm Zen 2 (Renoir) 6/12 3.6GHz 4.1GHz 11MB 20 (Gen 3) + 16 65W $129
3 4100 7nm Zen 2 (Renoir) 4/8 3.8GHz 4GHz 6MB 20 (Gen 3) + 16 65W $99


For the time being, Ryzen Series 3000 and 5000 will co-exists next to each other. However, with time passing by, we do not doubt that series 3000 will phase out at one point. But let's talk a tad more about architectural changes. The Ryzen 7 5700X is a new 8-core/16-thread processor that is worth taking a look at. It is based on the "Vermeer" MCM, exactly like the 5800X, and differs from the 5700G, which is built on monolithic silicon from the "Cezanne" family. The 5700X has a base frequency of 3.40 GHz and a boost frequency of 4.60 GHz, whereas the 5800X has a base frequency of 3.80 GHz and a boost frequency of 4.70 GHz. The Ryzen 7 5700X will be available for purchase at a suggested retail price of $299, implying that AMD is lowering the suggested retail price of the Ryzen 5 5600X, which previously held this price position. The 'cheap' 65W 8-core CPU is rumored to ship at a price of 299 USD. This CPU operates at a base clock speed of 3.4 GHz, 400 MHz slower than the 5800X. However, the boost clock will be reduced by just 100 MHz as Videocardz reiterates.  AMD is also offering two Ryzen 5 CPUs with six cores: the 5600 and 5500. In contrast to prior reports, both SKUs allegedly support SMT (so they have 12 threads). However, there is a slight variation in clock speeds: the 5600 features 3.5/4.4 GHz base and boost frequencies, while the 5500 features 3.6 and 4.2 GHz base and boost frequencies. Additionally, it appears as though the 5500 comes with 16MB of L3 cache, whereas the 5600 comes with 32MB. This is most likely due to the fact that 5500 is based on Cezanne silicon, whereas 5600 is based on Vermeer silicon. AMD will introduce up to three Ryzen 4000 SKUs: 4600G, 4500, and 4100, all of which will be priced around 154 USD. The Ryzen 5 4500 is likely to retail for 129 USD, while the Ryzen 3 4100 is slated to retail for 99 USD. Those are almost certainly Renoir-X components with the integrated graphics deactivated

DDR4 memory support

DDR4 memory support will not be very different from the previous generation with one remark made. On ZEN2, as soon as you go higher than DDR4-3733 MHz, a 2:1 multiplier will kick in for the Infinity Fabric (the interlink in between the processor die and IO chip, which starts working at half the memory clock frequency. That 2:1 multiplier switches on at DDR4-3733, which would affect the speed at which the various core complexes within the CPU can communicate with each other. For the best overall system performance, AMD, therefore, recommended DDR4-3600 speed. For ZEN3, this is slightly different as the clock frequency of that interlink was raised a notch and can now support 4000 MHz without the IF limiter kicking in. DDR4-3600 is the price/performance "sweet spot" and remains AMD's recommendation for the Zen 3-based processors. However, the new optimum is DDR4-4000 with a synchronous IF or fabric clock (FCLK) and memory controller clock (ULCK) of 2,000 MHz.


Chipset compatibility

ZEN3 based Ryzen 5000 series processors will be drop-in compatible with the Series 500 chipset motherboard like the B550 and X570 (you'll need the latest available BIOS, of course). There will also be Series 400 chipset support for motherboards that have a 32MB BIOS. In short, for Ryzen 4000, aka ZEN3 processors that are released, it is recommended to have a B550 or X570 motherboard. With motherboards like B550 and X570, you are guaranteed to get optimal support for Zen 3 processors when they get released. Much like before, support will be added through firmware updates that motherboard manufacturers will make available and already made available by many manufacturers. Please check their website for BIOS updates.  Initially, AMD had no plans to introduce “Zen 3” architecture support for older chipsets. While they wish could enable full support for every processor on every chipset, the flash memory chips that store BIOS settings and support have capacity limitations.  So on the Series 400 chipset, you need to have 32MB BIOS storage; please check this with your manufacturer. Starting January 2021, they will introduce Ryzen 5000 support on selected motherboards in the B450 and X470 range.

Share this content
Twitter Facebook Reddit WhatsApp Email Print