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Estimated Price:
$2,376.76 -3%
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CPU Core Details

CPU Codename Castle Peak Castle Peak
MoBo Socket Socket sTRX4 Socket sTRX4
Notebook CPU no no
Release Date 05 Jan 2020 25 Nov 2019
CPU Link GD Link GD Link
Approved

CPU Technical Specifications

{
CPU Cores 64 32
CPU Threads 127 64
Clock Speed 3 GHz 3.7 GHz
Turbo Frequency 4.5GHz 4.5 GHz
Max TDP 280 W 280 W
Lithography 7 nm 7 nm
Bit Width 64 Bit 64 Bit
Max Temperature 68°C 68°C
Virtualization Technology no no

CPU Cache and Memory

L1 Cache Size 3072 KB 3072 KB
L2 Cache Size 32767 KB 16384 KB
L3 Cache Size 260 MB 128 MB
Memory Types
Max Memory Size 2048 GB 2048 GB
Memory Channels 4 4
ECC Memory Support no no

CPU Graphics

Integrated Graphics no no
Base GPU Frequency - -
Max GPU Frequency - -
DirectX - -
Displays Supported - -

CPU Mini Review

Mini Review The AMD Threadripper 3990X 64-Core 3.0GHz is an extremely high-end (HEDT) CPU based on AMD's 7nm Zen 2 microarchitecture. It offers 64 physical cores (128 logical), initially clocked at 3.0Hz, which may go up to 4.5GHz using Turbo Boost. As of 2020, it is the only HEDT processor with 64 cores. It has an unlocked multiplier, therefore it can be overclocked using traditional methods. It has 260MB of L3 Cache. Level 3 cache is a static memory bank of a processor and it is used to feed it instructions. This processor also supports DDR4 based RAMs with maximum memory support of 2TB. It has a maximum Thermal Power Design of 280W, making it one of the most power intensive processors on the market. It also has a maximum temperature of 68C so appropriate CPU cooling will be necessary. Among its many features are Enmotus FuzeDrive for AMD Ryzen, AMD SenseMI Technology, AMD Ryzen VR-Ready Premium, Virtualization, AES, AVX2, FMA4, XFR (Extended Frequency Range) It doesn't feature an integrated GPU. The Threadripper 3990X 64-Core 3.0GHz's high core count and middling clock speed make it a decent but extremely expensive option for gamers. This CPU is better suited to prosumers and content creators who may be running high-intensity threaded applications. It will run AAA games very well. While a high clock speed is a priority for gaming, 64 cores is truly excessive for any gaming applications in 2020 and beyond. The AMD Threadripper 3970X 32-Core 3.7GHz is an extremely high-end (HEDT) CPU based on AMD's 7nm Zen 2 microarchitecture. It offers 32 physical cores (64 logical), initially clocked at 3.7Hz, which may go up to 4.5GHz using Turbo Boost. It has an unlocked multiplier, therefore it can be overclocked using traditional methods. It has 128MB of L3 Cache. Level 3 cache is a static memory bank of a processor and it is used to feed it instructions. This processor also supports DDR4 based RAMs with maximum memory support of 2TB. It has a maximum Thermal Power Design of 280W, making it one of the most power intensive processors on the market. It also has a maximum temperature of 68C so appropriate CPU cooling will be necessary. Among its many features are Enmotus FuzeDrive for AMD Ryzen, AMD SenseMI Technology, AMD Ryzen VR-Ready Premium, Virtualization, AES, AVX2, FMA4, XFR (Extended Frequency Range) It doesn't feature an integrated GPU. The Threadripper 3970X 32-Core 3.7GHz's high core count and solid clock speed make it a good but extremely expensive option for gamers. This CPU is better suited to prosumers and content creators who may be running high-intensity threaded applications. It will run AAA games very well. While a high clock speed is a priority for gaming, 24 cores is excessive for all gaming applications in 2020.

Gaming Performance Comparison

In terms of overall gaming performance, the AMD Threadripper 3990X 64-Core 3.0GHz is massively better than the AMD Threadripper 3970X 32-Core 3.7GHz when it comes to running the latest games. This also means it will be less likely to bottleneck more powerful GPUs, allowing them to achieve more of their gaming performance potential.

Both the Threadripper 3990X 64-Core 3.0GHz and the Threadripper 3970X 32-Core 3.7GHz were released at the same time, so are likely to be quite similar.

Both CPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings (assuming they are accompanied by equivalently powerful GPUs).

The 64 has 32 more cores than the Threadripper 3970X 32-Core. 64 cores is probably excessive if you mean to just run the latest games, as games are not yet able to harness this many cores. The 32 cores in the Threadripper 3970X 32-Core is more than enough for gaming purposes. However, if you intend on running a server with the 64, it would seem to be a decent choice.

The Threadripper 3990X 64-Core has 63 more threads than the Threadripper 3970X 32-Core. Both the Threadripper 3990X 64-Core and the Threadripper 3970X 32-Core use hyperthreading. The Threadripper 3990X 64-Core has 1.984375 logical threads per physical core and the Threadripper 3970X 32-Core has 2.

Multiple threads are useful for improving the performance of multi-threaded applications. Additional cores and their accompanying thread will always be beneficial for multi-threaded applications. Hyperthreading will be beneficial for applications optimized for it, but it may slow others down. For games, the number of threads is largely irrelevant, as long as you have at least 2 cores (preferably 4), and hyperthreading can sometimes even hit performance.

More important for gaming than the number of cores and threads is the clock rate. Problematically, unless the two CPUs are from the same family, this can only serve as a general guide and nothing like an exact comparison, because the clock cycles per instruction (CPI) will vary so much.

The Threadripper 3990X 64-Core and the Threadripper 3970X 32-Core are from the same family of CPUs, and thus their clock speeds are directly comparable. With this in mind, it is safe to say that with a 0.7 GHz faster base clock rate, the Threadripper 3970X 32-Core manages to provide significantly better performance than the <span class='gpu1Mention'>Threadripper 3990X 64-Core</span>.

Aside from the clock rate, the next-most important CPU features for PC game performance are L2 and L3 cache size. Faster than RAM, the more cache available, the more data that can be stored for lightning-fast retrieval. L1 Cache is not usually an issue anymore for gaming, with most high-end CPUs eking out about the same L1 performance, and L2 is more important than L3 - but L3 is still important if you want to reach the highest levels of performance. Bear in mind that although it is better to have a larger cache, the larger it is, the higher the latency, so a balance has to be struck.

The <span class='gpu1Mention'>Threadripper 3990X 64-Core</span> has a 16383 KB bigger L2 cache than the <span class='gpu2Mention'>Threadripper 3970X 32-Core</span>, which means that it, at worst, wins out in this area, and at best, will provide superior gaming performance and will work much better with high-end graphics cards.

The maximum Thermal Design Power is the power in Watts that the CPU will consume in the worst case scenario. The lithography is the semiconductor manufacturing technology being used to create the CPU - the smaller this is, the more transistors that can be fit into the CPU, and the closer the connections. For both the lithography and the TDP, it is the lower the better, because a lower number means a lower amount of power is necessary to run the CPU, and consequently a lower amount of heat is produced.

Both the Threadripper 3990X 64-Core and the Threadripper 3970X 32-Core have the same TDP of 280 Watts, and were created with the same manufacturing size of 7 nm, which means they will affect your yearly electricity bill about equally.