Xeon 6516P-B vs Core 2 Duo E6420
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3095 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Server |
| Power efficiency | 0.28 | no data |
| Designer | Intel | Intel |
| Manufacturer | no data | Intel |
| Architecture codename | Conroe (2006−2007) | Granite Rapids (2024−2025) |
| Release date | April 2007 (18 years ago) | 24 February 2025 (less than a year ago) |
| Launch price (MSRP) | no data | $1,544 |
Detailed specifications
Core 2 Duo E6420 and Xeon 6516P-B basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 2 (Dual-core) | 20 (Icosa-Core) |
| Performance-cores | no data | 20 |
| Threads | 2 | 40 |
| Base clock speed | 2.13 GHz | 2.3 GHz |
| Boost clock speed | 2.13 GHz | 3.5 GHz |
| Bus rate | 1066 MHz | no data |
| L1 cache | 64 KB | 112 KB (per core) |
| L2 cache | 4 MB | 2 MB (per core) |
| L3 cache | 0 KB | 80 MB (shared) |
| Chip lithography | 65 nm | Intel 3 nm |
| Die size | 111 mm2 | 598 mm2 |
| Maximum core temperature | 60 °C | no data |
| Maximum case temperature (TCase) | no data | 85 °C |
| Number of transistors | 167 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| VID voltage range | 0.85V-1.5V | no data |
Compatibility
Information on Core 2 Duo E6420 and Xeon 6516P-B compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | 2 |
| Socket | PLGA775 | FCBGA4368 |
| Power consumption (TDP) | 65 Watt | 145 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Duo E6420 and Xeon 6516P-B. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | - |
| QuickAssist | no data | + |
| Speed Shift | no data | - |
| Turbo Boost Technology | - | 2.0 |
| Hyper-Threading Technology | - | + |
| TSX | - | + |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
| Deep Learning Boost | - | + |
Security technologies
Core 2 Duo E6420 and Xeon 6516P-B technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| SGX | no data | Yes with Intel® SPS |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Duo E6420 and Xeon 6516P-B are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E6420 and Xeon 6516P-B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR5 |
| Maximum memory size | no data | 1.13 TB |
| Max memory channels | no data | 4 |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | N/A |
Peripherals
Specifications and connection of peripherals supported by Core 2 Duo E6420 and Xeon 6516P-B.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 48 |
| PCI support | no data | Gen 4, Gen 5 |
| Integrated LAN | no data | + |
Pros & cons summary
| Physical cores | 2 | 20 |
| Threads | 2 | 40 |
| Power consumption (TDP) | 65 Watt | 145 Watt |
Core 2 Duo E6420 has 123.1% lower power consumption.
Xeon 6516P-B, on the other hand, has 900% more physical cores and 1900% more threads.
We couldn't decide between Intel Core 2 Duo E6420 and Intel Xeon 6516P-B. We've got no test results to judge.
Note that Core 2 Duo E6420 is a desktop processor while Xeon 6516P-B is a server/workstation one.
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