Intel Xeon E5-1681 v3 vs Intel Xeon 6518P-B Full Specs
10 Cores 20 Threads 2.9GHz | 20 Cores 40 Threads 2GHz |
TDP 135W | TDP 150W |
Bandwidth 68.3GB/s DDR4 | Bandwidth 153.6GB/s DDR5 |
iGPU 0 | iGPU 0 |
Socket | Socket |
Xeon E5-1681 v31,250
Xeon 6518P-B-10 Cores | 20 Cores |
20 Threads | 40 Threads |
Base Clock 2.9GHz | Base Clock 2GHz |
Boost Clock 3.5GHz | Boost Clock 3.5GHz |
Overclocking Locked | Overclocking Locked |
L1i 32KB | L1i 64KB |
L1d 32KB | L1d 48KB |
L2 256KB | L2 2MB |
L3 25MB | L3 80MB |
Type DDR4 | Type DDR5 |
Max Memory 768GB | Max Memory 1.13TB |
ECC Yes | ECC Yes |
Channels 4 | Channels 4 |
Bus Width 256-bit | Bus Width 256-bit |
Speed 2133MT/s | Speed 4800MT/s |
Bandwidth 68.3GB/s | Bandwidth 153.6GB/s |
Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 68.3GB/s | Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 153.6GB/s |
TDP 135W | TDP 150W |
T-Case - | T-Case 85°C Max |
Bus Type DMI | Bus Type - |
Bus Config 4 lanes | Bus Config - |
Bus Speed 5GT/s | Bus Speed - |
Bus Bandwidth 2.5GB/s | Bus Bandwidth - |
PCIe PCIe 3.0 x4039.4GB/sBandwidth | PCIe PCIe 5.0 x32126GB/sBandwidth |
- | PCIe Secondary PCIe 4.0 x1631.5GB/sBandwidth |
Manufacturer | Manufacturer |
ISA x86-64 | ISA x86-64 |
Architecture | Architecture |
Family | Family |
Branding  | Branding  |
Codename Haswell-EN - Haswell-E-MCCVariant - - | Codename Granite Rapids-D 27Die Granite Rapids-HCCVariant Redwood CoveP-Core 20M-Core |
Market Segment Server | Market Segment Server |
Release Date Sep 8, 2014 | Release Date Dec 1, 2025 |
Foundry Intel | Foundry Intel |
Other Foundries - | Other Foundries IntelIO |
Fabrication Node 22nm - | Fabrication Node Intel 3 Intel 7IO |
Die Size 492mm² - | Die Size 598mm² 482mm²IO |
Transistor Count 3.8 Billion | Transistor Count - |
Transistor Density 8 MTr/mm² | Transistor Density - |
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