Xeon 634 vs Pentium G645
Aggregate performance score
Xeon 634 outperforms Pentium G645 by a whopping 2547% 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 | 2958 | 343 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.06 | 24.94 |
| Market segment | Desktop processor | Server |
| Power efficiency | 0.54 | 6.21 |
| Designer | Intel | Intel |
| Manufacturer | Intel | Intel |
| Architecture codename | Sandy Bridge (2011−2013) | Granite Rapids (2024−2026) |
| Release date | 2 September 2012 (14 years ago) | 2 February 2026 (less than a year ago) |
| Launch price (MSRP) | $80 | $499 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Xeon 634 has 41467% better value for money than Pentium G645.
Performance to price scatter graph
Currently popular graphics cards are shown for comparison.
Detailed specifications
Basic parameters of Pentium G645 and Xeon 634: 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) | 12 (Dodeca-Core) |
| Performance-cores | no data | 12 |
| Threads | 2 | 24 |
| Base clock speed | 2.9 GHz | 2.7 GHz |
| Boost clock speed | 2.9 GHz | 4.6 GHz |
| Bus rate | 5 GT/s | 0 GT/s |
| L1 cache | 64 KB (per core) | 112 KB (per core) |
| L2 cache | 256 KB (per core) | 2 MB (per core) |
| L3 cache | 3 MB (shared) | 48 MB (shared) |
| Chip lithography | 32 nm | Intel 3 nm |
| Die size | 131 mm2 | 598 mm2 |
| Maximum core temperature | 69 °C | no data |
| Maximum case temperature (TCase) | no data | 68 °C |
| Number of transistors | 504 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Pentium G645 and Xeon 634 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 | 1 |
| Socket | FCLGA1155 | FCLGA4710 |
| Power consumption (TDP) | 65 Watt | 150 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium G645 and Xeon 634. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2 | Intel® SSE4.1, Intel® AMX, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | - | 2.0 |
| Hyper-Threading Technology | - | + |
| TSX | - | + |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Flex Memory Access | + | no data |
| Turbo Boost Max 3.0 | no data | + |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| Deep Learning Boost | - | + |
Security technologies
Pentium G645 and Xeon 634 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| SGX | no data | - |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium G645 and Xeon 634 are enumerated here.
| VT-d | - | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium G645 and Xeon 634. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR5(6400MT/s) |
| Maximum memory size | 32 GB | 2 TB |
| Max memory channels | 2 | 4 |
| Maximum memory bandwidth | 17 GB/s | no data |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics for 2nd Generation Intel Processors | N/A |
| Graphics max frequency | 1.1 GHz | no data |
Graphics interfaces
Available interfaces and connections of Pentium G645 and Xeon 634 integrated GPUs.
| Number of displays supported | 2 | no data |
Peripherals
Specifications and connection of peripherals supported by Pentium G645 and Xeon 634.
| PCIe version | 2.0 | 5.0 |
| PCI Express lanes | no data | 80 |
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 | 0.85 | 22.50 |
| Recency | 2 September 2012 | 2 February 2026 |
| Physical cores | 2 | 12 |
| Threads | 2 | 24 |
| Power consumption (TDP) | 65 Watt | 150 Watt |
Pentium G645 has 131% lower power consumption.
Xeon 634, on the other hand, has a 2547% higher aggregate performance score, an age advantage of 13 years, and 500% more physical cores and 1100% more threads.
The Intel Xeon 634 is our recommended choice as it beats the Intel Pentium G645 in performance tests.
Note that Pentium G645 is a desktop processor while Xeon 634 is a server/workstation one.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
