Xeon E5603 vs i7-975
Aggregate performance score
Core i7-975 outperforms Xeon E5603 by an impressive 80% based on our aggregate benchmark results.
Primary details
Comparing Core i7-975 and Xeon E5603 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1812 | 2294 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.11 | 0.14 |
| Market segment | Desktop processor | Server |
| Series | Core i7 (Desktop) | no data |
| Architecture codename | Bloomfield (2008−2010) | Westmere-EP (2010−2011) |
| Release date | 2 June 2009 (15 years ago) | 14 February 2011 (13 years ago) |
| Launch price (MSRP) | $476 | $286 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Xeon E5603 has 27% better value for money than i7-975.
Detailed specifications
Core i7-975 and Xeon E5603 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 | 4 (Quad-Core) | 4 (Quad-Core) |
| Threads | 8 | 4 |
| Base clock speed | 3.33 GHz | 1.6 GHz |
| Boost clock speed | 3.6 GHz | 1.6 GHz |
| Bus rate | 1333 MHz | no data |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 256 KB (per core) | 256 KB (per core) |
| L3 cache | 8 MB (shared) | 4 MB (shared) |
| Chip lithography | 45 nm | 32 nm |
| Die size | 263 mm2 | 239 mm2 |
| Maximum case temperature (TCase) | 68 °C | no data |
| Number of transistors | 731 million | 1,170 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i7-975 and Xeon E5603 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 | FCLGA1366 | FCLGA1366,LGA1366 |
| Power consumption (TDP) | 130 Watt | 80 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-975 and Xeon E5603. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | Intel® SSE4.2 |
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 1.0 | - |
| Hyper-Threading Technology | + | - |
| Idle States | + | + |
| Demand Based Switching | - | + |
| PAE | 36 Bit | 40 Bit |
| Status | Discontinued | Discontinued |
Security technologies
Core i7-975 and Xeon E5603 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-975 and Xeon E5603 are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-975 and Xeon E5603. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | 24 GB | 288 GB |
| Max memory channels | 3 | 3 |
| Maximum memory bandwidth | 25.6 GB/s | 25.6 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | no data |
Peripherals
Specifications and connection of peripherals supported by Core i7-975 and Xeon E5603.
| PCIe version | 2.0 | 2.0 |
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 | 2.29 | 1.27 |
| Recency | 2 June 2009 | 14 February 2011 |
| Threads | 8 | 4 |
| Chip lithography | 45 nm | 32 nm |
| Power consumption (TDP) | 130 Watt | 80 Watt |
i7-975 has a 80.3% higher aggregate performance score, and 100% more threads.
Xeon E5603, on the other hand, has an age advantage of 1 year, a 40.6% more advanced lithography process, and 62.5% lower power consumption.
The Core i7-975 is our recommended choice as it beats the Xeon E5603 in performance tests.
Note that Core i7-975 is a desktop processor while Xeon E5603 is a server/workstation one.
Should you still have questions on choice between Core i7-975 and Xeon E5603, ask them in Comments section, and we shall answer.
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