Intel Xeon 6544P-B vs Intel Xeon E5-1681 v3 Full Specs
32 Cores 64 Threads 2GHz | 10 Cores 20 Threads 2.9GHz |
TDP 170W | TDP 135W |
Bandwidth 179.2GB/s DDR5 | Bandwidth 68.3GB/s DDR4 |
Socket | Socket |
Xeon 6544P-B-
Xeon E5-1681 v31,25032 Cores | 10 Cores |
64 Threads | 20 Threads |
Base Clock 2GHz | Base Clock 2.9GHz |
Boost Clock 3.3GHz | Boost Clock 3.5GHz |
Overclocking Locked | Overclocking Locked |
L1i 64KB | L1i 32KB |
L1d 48KB | L1d 32KB |
L2 2MB | L2 256KB |
L3 128MB | L3 25MB |
Type DDR5 | Type DDR4 |
Max Memory 1.13TB | Max Memory 768GB |
ECC Yes | ECC Yes |
Channels 4 | Channels 4 |
Bus Width 256-bit | Bus Width 256-bit |
Speed 5600MT/s | Speed 2133MT/s |
Bandwidth 179.2GB/s | Bandwidth 68.3GB/s |
Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 179.2GB/s | Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 68.3GB/s |
TDP 170W | TDP 135W |
T-Case 85°C Max | T-Case - |
Bus Type - | Bus Type DMI |
Bus Config - | Bus Config 4 lanes |
Bus Speed - | Bus Speed 5GT/s |
Bus Bandwidth - | Bus Bandwidth 2.5GB/s |
PCIe PCIe 5.0 x32126GB/sBandwidth | PCIe PCIe 3.0 x4039.4GB/sBandwidth |
PCIe Secondary PCIe 4.0 x1631.5GB/sBandwidth | - |
Manufacturer | Manufacturer |
ISA x86-64 | ISA x86-64 |
Architecture | Architecture |
Family | Family |
Branding  | Branding  |
Codename Granite Rapids-D 27Die Granite Rapids-HCCVariant Redwood CoveP-Core 32M-Core | Codename Haswell-EN - Haswell-E-MCCVariant - - |
Market Segment Server | Market Segment Server |
Release Date Dec 1, 2025 | Release Date Sep 8, 2014 |
Foundry Intel | Foundry Intel |
Other Foundries IntelIO | Other Foundries - |
Fabrication Node Intel 3 Intel 7IO | Fabrication Node 22nm - |
Die Size 598mm² 482mm²IO | Die Size 492mm² - |
Transistor Count - | Transistor Count 3.8 Billion |
Transistor Density - | Transistor Density 8 MTr/mm² |
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