Xeon E3-1275 vs X5675
Aggregate performance score
Xeon X5675 outperforms Xeon E3-1275 by a moderate 16% based on our aggregate benchmark results.
Primary details
Comparing Xeon X5675 and Xeon E3-1275 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1408 | 1533 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 3.80 | 0.99 |
| Market segment | Server | Server |
| Power efficiency | 4.01 | 3.46 |
| Architecture codename | Westmere-EP (2010−2011) | Sandy Bridge (2011−2013) |
| Release date | 14 February 2011 (13 years ago) | 3 April 2011 (13 years ago) |
| Launch price (MSRP) | $162 | $450 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Xeon X5675 has 284% better value for money than Xeon E3-1275.
Detailed specifications
Xeon X5675 and Xeon E3-1275 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) | 4 (Quad-Core) |
| Threads | 12 | 8 |
| Base clock speed | 3.06 GHz | 3.4 GHz |
| Boost clock speed | 3.46 GHz | 3.8 GHz |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 256 KB (per core) | 256 KB (per core) |
| L3 cache | 12288 KB (shared) | 8 MB (shared) |
| Chip lithography | 32 nm | 32 nm |
| Die size | 239 mm2 | 216 mm2 |
| Maximum core temperature | 81 °C | 73 °C |
| Number of transistors | 1,170 million | 1,160 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Xeon X5675 and Xeon E3-1275 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 | LGA1155 |
| Power consumption (TDP) | 95 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon X5675 and Xeon E3-1275. 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® AVX |
| AES-NI | + | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 1.0 | 2.0 |
| Hyper-Threading Technology | + | + |
| Idle States | + | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Demand Based Switching | + | + |
| PAE | 40 Bit | no data |
| FDI | no data | + |
| Fast Memory Access | no data | + |
Security technologies
Xeon X5675 and Xeon E3-1275 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| Identity Protection | - | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon X5675 and Xeon E3-1275 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon X5675 and Xeon E3-1275. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | 288 GB | 32 GB |
| Max memory channels | 3 | 2 |
| Maximum memory bandwidth | 32 GB/s | 21 GB/s |
| ECC memory support | + | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel HD P3000 |
| Quick Sync Video | - | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 1.35 GHz |
| InTru 3D | no data | + |
Graphics interfaces
Available interfaces and connections of Xeon X5675 and Xeon E3-1275 integrated GPUs.
| Number of displays supported | no data | 2 |
Peripherals
Specifications and connection of peripherals supported by Xeon X5675 and Xeon E3-1275.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | no data | 20 |
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.
Pros & cons summary
| Performance score | 4.03 | 3.47 |
| Recency | 14 February 2011 | 3 April 2011 |
| Physical cores | 6 | 4 |
| Threads | 12 | 8 |
Xeon X5675 has a 16.1% higher aggregate performance score, and 50% more physical cores and 50% more threads.
Xeon E3-1275, on the other hand, has an age advantage of 1 month.
The Xeon X5675 is our recommended choice as it beats the Xeon E3-1275 in performance tests.
Should you still have questions on choice between Xeon X5675 and Xeon E3-1275, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
