AMD Ryzen Threadripper PRO 3955WX vs Intel Xeon 638 Full Specs
Ryzen Threadripper PRO 3955WX1,669
Xeon 638-16 Cores | 16 Cores |
32 Threads | 32 Threads |
Base Clock 3.9GHz | Base Clock 3.2GHz |
Boost Clock 4.3GHz | Boost Clock 4.8GHz |
Overclocking Locked | Overclocking Locked |
L1i 32KB | L1i 64KB |
L1d 32KB | L1d 48KB |
L2 512KB | L2 2MB |
L3 64MB | L3 72MB |
Type DDR4 | Type DDR5 |
Max Memory 2.05TB | Max Memory 2.05TB |
ECC Yes | ECC Yes |
Channels 8 | Channels 4 |
Bus Width 512-bit | Bus Width 256-bit |
Speed 3200MT/s | Speed 6400MT/s |
Bandwidth 204.8GB/s | Bandwidth 204.8GB/s |
Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 204.8GB/s | Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 204.8GB/s |
TDP 280W | TDP 180W |
Peak Power 280W | Peak Power 216W |
Max Operating Temp 90°C Max | Max Operating Temp 100°C Max |
T-Case - | T-Case 76°C Max |
Included Cooler 0 | Included Cooler - |
Bus Type PCIe | Bus Type - |
Bus Config 8 lanes | Bus Config - |
Bus Speed 16GT/s | Bus Speed - |
Bus Bandwidth 16GB/s | Bus Bandwidth - |
PCIe PCIe 4.0 x128252GB/sBandwidth | PCIe PCIe 5.0 x80315GB/sBandwidth |
Manufacturer | Manufacturer |
ISA x86-64 | ISA x86-64 |
Architecture | Architecture |
Family | Family |
Branding  | Branding  |
Codename Castle Peak Aspen HighlandsDie Castle Peak 2CCDVariant - - | Codename Granite Rapids-D 16Die Granite Rapids-LCCVariant Redwood CoveP-Core 16M-Core |
Market Segment Workstation | Market Segment Workstation |
Release Date Jul 14, 2020 | Release Date Feb 2, 2026 |
Foundry TSMC | Foundry Intel |
Other Foundries GlobalFoundriesIO | Other Foundries IntelIO |
Fabrication Node N7 12LPIO | Fabrication Node Intel 3 Intel 7IO |
Die Size 148mm² 416mm²IO | Die Size - 482mm²IO |
Transistor Count 7.6 Billion 8.3 BillionIO | Transistor Count - |
Transistor Density 51 MTr/mm² 20 MTr/mm²IO | Transistor Density - |
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