Xeon X5355 vs E5649
Aggregate performance score
Xeon E5649 outperforms Xeon X5355 by a whopping 178% 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 | 1810 | 2606 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.56 | 0.02 |
| Market segment | Server | Server |
| Power efficiency | 1.70 | 0.41 |
| Designer | Intel | Intel |
| Manufacturer | Intel | no data |
| Architecture codename | Westmere-EP (2010−2011) | Clovertown (2006−2007) |
| Release date | 14 February 2011 (15 years ago) | 14 November 2006 (19 years ago) |
| Launch price (MSRP) | $45 | $1,172 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Xeon E5649 has 7700% better value for money than Xeon X5355.
Performance to price scatter graph
Detailed specifications
Basic parameters of Xeon E5649 and Xeon X5355: 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 | 4 |
| Base clock speed | 2.53 GHz | 2.66 GHz |
| Boost clock speed | 2.93 GHz | 0.67 GHz |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 256 KB (per core) | 4 MB (per die) |
| L3 cache | 12288 KB (shared) | 8 MB L2 Cache |
| Chip lithography | 32 nm | 65 nm |
| Die size | 239 mm2 | 2x 143 mm2 |
| Maximum core temperature | 76 °C | no data |
| Maximum case temperature (TCase) | no data | 63 °C |
| Number of transistors | 1,170 million | 582 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| VID voltage range | no data | 1V-1.5V |
Compatibility
Information on Xeon E5649 and Xeon X5355 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 | 2 |
| Socket | FCLGA1366 | LGA771,PLGA771 |
| Power consumption (TDP) | 80 Watt | 120 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E5649 and Xeon X5355. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | no data |
| AES-NI | + | - |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 1.0 | - |
| Hyper-Threading Technology | + | - |
| Idle States | + | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | + | + |
| PAE | 40 Bit | 32 Bit |
| FSB parity | no data | + |
Security technologies
Xeon E5649 and Xeon X5355 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E5649 and Xeon X5355 are enumerated here.
| VT-d | + | no data |
| VT-x | + | + |
| EPT | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E5649 and Xeon X5355. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR2, DDR3 Depends on motherboard |
| Maximum memory size | 288 GB | no data |
| Max memory channels | 3 | no data |
| 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 E5649 and Xeon X5355.
| PCIe version | 2.0 | no data |
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.
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 | 3.23 | 1.16 |
| Recency | 14 February 2011 | 14 November 2006 |
| Physical cores | 6 | 4 |
| Threads | 12 | 4 |
| Chip lithography | 32 nm | 65 nm |
| Power consumption (TDP) | 80 Watt | 120 Watt |
Xeon E5649 has a 178% higher aggregate performance score, an age advantage of 4 years, 50% more physical cores and 200% more threads, a 103% more advanced lithography process, and 50% lower power consumption.
The Intel Xeon E5649 is our recommended choice as it beats the Intel Xeon X5355 in performance tests.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
