Xeon 6315P vs E5645
Aggregate performance score
Xeon 6315P outperforms Xeon E5645 by a whopping 138% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1931 | 1242 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.40 | 22.53 |
| Market segment | Server | Server |
| Power efficiency | 1.48 | 5.14 |
| Designer | Intel | Intel |
| Manufacturer | Intel | Intel |
| Architecture codename | Westmere-EP (2010−2011) | Raptor Lake-R (2023−2025) |
| Release date | 16 March 2010 (16 years ago) | 24 February 2025 (1 year ago) |
| Launch price (MSRP) | $294 | $213 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Xeon 6315P has 5533% better value for money than Xeon E5645.
Performance to price scatter graph
Detailed specifications
Basic parameters of Xeon E5645 and Xeon 6315P: 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 | 6 (Hexa-Core) | 4 (Quad-Core) |
| Performance-cores | no data | 4 |
| Threads | 12 | 4 |
| Base clock speed | 2.4 GHz | 2.8 GHz |
| Boost clock speed | 2.67 GHz | 4.7 GHz |
| Bus rate | no data | 16 GT/s |
| L1 cache | 64 KB (per core) | 80 KB (per core) |
| L2 cache | 256 KB (per core) | 1.25 MB (per core) |
| L3 cache | 12 MB (shared) | 12 MB (shared) |
| Chip lithography | 32 nm | Intel 7 nm |
| Die size | 239 mm2 | 163 mm2 |
| Maximum core temperature | 76 °C | 100 °C |
| Number of transistors | 1,170 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Xeon E5645 and Xeon 6315P 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 | 2 | 1 |
| Socket | FCLGA1366,LGA1366 | FCLGA1700 |
| Power consumption (TDP) | 80 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5645 and Xeon 6315P. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 1.0 | 2.0 |
| Hyper-Threading Technology | + | - |
| Idle States | + | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | + | no data |
| PAE | 40 Bit | no data |
| Turbo Boost Max 3.0 | no data | - |
Security technologies
Xeon E5645 and Xeon 6315P technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5645 and Xeon 6315P are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Xeon 6315P. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR5-4800 |
| Maximum memory size | 288 GB | 128 GB |
| Max memory channels | 3 | 2 |
| Maximum memory bandwidth | 32 GB/s | no data |
| 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 Xeon E5645 and Xeon 6315P.
| PCIe version | 2.0 | 5.0 |
| PCI Express lanes | no data | 20 |
Synthetic benchmarks
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance. Other than that, Passmark measures multi-core performance.
Pros & cons summary
| Performance score | 2.81 | 6.70 |
| Recency | 16 March 2010 | 24 February 2025 |
| Physical cores | 6 | 4 |
| Threads | 12 | 4 |
| Power consumption (TDP) | 80 Watt | 55 Watt |
Xeon E5645 has 50% more physical cores and 200% more threads.
Xeon 6315P, on the other hand, has a 138% higher aggregate performance score, an age advantage of 14 years, and 45% lower power consumption.
The Intel Xeon 6315P is our recommended choice as it beats the Intel Xeon E5645 in performance tests.
Other comparisons
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