Pentium Gold G6405 vs Xeon E5645
Aggregate performance score
Xeon E5645 outperforms Pentium Gold G6405 by a moderate 19% based on our aggregate benchmark results.
Primary details
Comparing Xeon E5645 and Pentium Gold G6405 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1603 | 1705 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.25 | no data |
| Market segment | Server | Desktop processor |
| Power efficiency | 3.76 | 4.36 |
| Architecture codename | Westmere-EP (2010−2011) | Comet Lake-R (2021) |
| Release date | 16 March 2010 (14 years ago) | 16 March 2021 (3 years ago) |
| Launch price (MSRP) | $294 | $64 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Xeon E5645 and Pentium Gold G6405 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 | 6 (Hexa-Core) | 2 (Dual-core) |
| Threads | 12 | 4 |
| Base clock speed | 2.4 GHz | 4.1 GHz |
| Boost clock speed | 2.67 GHz | 4.1 GHz |
| Bus rate | no data | 8 GT/s |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 256 KB (per core) | 256 KB (per core) |
| L3 cache | 12 MB (shared) | 4 MB (shared) |
| Chip lithography | 32 nm | 14 nm |
| Die size | 239 mm2 | no data |
| Maximum core temperature | 76 °C | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 1,170 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
Compatibility
Information on Xeon E5645 and Pentium Gold G6405 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 | FCLGA1200 |
| Power consumption (TDP) | 80 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5645 and Pentium Gold G6405. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | + | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 1.0 | - |
| 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 Pentium Gold G6405 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| Secure Key | no data | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5645 and Pentium Gold G6405 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Pentium Gold G6405. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4-2666 |
| Maximum memory size | 288 GB | 128 GB |
| Max memory channels | 3 | 2 |
| Maximum memory bandwidth | 32 GB/s | 41.6 GB/s |
| ECC memory support | + | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel UHD Graphics 610 |
| Max video memory | no data | 64 GB |
| Quick Sync Video | - | + |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 1.05 GHz |
| InTru 3D | no data | + |
Graphics interfaces
Available interfaces and connections of Xeon E5645 and Pentium Gold G6405 integrated GPUs.
| Number of displays supported | no data | 3 |
Graphics image quality
Maximum display resolutions supported by Xeon E5645 and Pentium Gold G6405 integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2160@30Hz |
| Max resolution over eDP | no data | 4096x2304@60Hz |
| Max resolution over DisplayPort | no data | 4096x2304@60Hz |
Graphics API support
APIs supported by Xeon E5645 and Pentium Gold G6405 integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Xeon E5645 and Pentium Gold G6405.
| PCIe version | 2.0 | 3.0 |
| PCI Express lanes | no data | 16 |
Synthetic benchmark performance
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. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
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.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Pros & cons summary
| Performance score | 3.18 | 2.67 |
| Recency | 16 March 2010 | 16 March 2021 |
| Physical cores | 6 | 2 |
| Threads | 12 | 4 |
| Chip lithography | 32 nm | 14 nm |
| Power consumption (TDP) | 80 Watt | 15 Watt |
Xeon E5645 has a 19.1% higher aggregate performance score, and 200% more physical cores and 200% more threads.
Pentium Gold G6405, on the other hand, has an age advantage of 11 years, a 128.6% more advanced lithography process, and 433.3% lower power consumption.
The Xeon E5645 is our recommended choice as it beats the Pentium Gold G6405 in performance tests.
Be aware that Xeon E5645 is a server/workstation processor while Pentium Gold G6405 is a desktop one.
Should you still have questions on choice between Xeon E5645 and Pentium Gold G6405, ask them in Comments section, and we shall answer.
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