Xeon X5647
Intel
PassMark
4,441
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Overview
The Xeon X5647 is manufactured by Intel. It was released in 14 February 2011 (14 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 4 cores and 8 threads. Base frequency is 2.93 GHz, with boost up to 3.2 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 4,441 points. Launch price was $175.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. The Xeon X5647 is positioned at rank #593 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon X5647
FPS Benchmarks
Predicted performance for Xeon X5647 across popular games. Tested paired with RTX 4090 to isolate CPU performance.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Technical Analysis
Detailed breakdown of Xeon X5647 specifications and capabilities.
Processing Power
The Xeon X5647 is a 4-core / 8-thread processor based on the Westmere-EP (2010−2011) architecture, manufactured on a 32 nm process node. It reaches a maximum boost clock of 3.2 GHz from a base frequency of 2.93 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. It carries 12 MB (total) of L3 cache, plus 256 kB (per core) of L2 cache and 64 kB (per core) of L1 cache per core. In the PassMark benchmark (a comprehensive multi-threaded test), it scores 4,441, placing it in the Entry Level performance tier as a Legacy generation product.
| Specification | Xeon X5647 |
|---|---|
| Cores / ThreadsPhysical/logical processing units | 4C / 8T |
| Max Boost ClockPeak single-core speed under boost | 3.2 GHz |
| Base ClockGuaranteed minimum operating frequency | 2.93 GHz |
| ArchitectureCPU microarchitecture design | Westmere-EP (2010−2011) |
| Process NodeFabrication technology — smaller = more efficient | 32 nm |
| L3 CacheShared cache — reduces memory latency for all cores | 12 MB (total) |
| L2 CachePer-core fast cache for frequently accessed data | 256 kB (per core) |
| L1 CacheUltra-fast per-core cache | 64 kB (per core) |
| Die SizePhysical silicon area of the processor | 239 mm2 |
| Transistor CountMore transistors = more capabilities | 1,170 million |
| Max TemperatureMaximum safe operating temperature (Tjmax) | 80 °C |
| 64-bit Support | Yes |
| Windows 11 Compatible | No |
| PassMark ScoreOverall multi-threaded benchmark score | 4,441 |
Memory & Platform
The Xeon X5647 fits into the LGA1366 socket and supports PCIe 5.0. It supports DDR3 memory at speeds up to DDR3-1066 (faster RAM improves bandwidth-sensitive workloads) across 3 channels (dual-channel doubles bandwidth). It supports ECC memory, providing error-correcting capabilities — essential for mission-critical workloads and servers.
| Specification | Xeon X5647 |
|---|---|
| TypeDesktop or Laptop processor | server |
| SocketMotherboard socket required | LGA1366 |
| PCIe GenerationPeripheral interconnect speed — affects GPU and SSD bandwidth | PCIe 5.0 |
| RAM TypeSupported memory standard | DDR3 |
| Max RAM SpeedMaximum officially supported memory frequency | DDR3-1066 |
| RAM ChannelsDual-channel doubles bandwidth vs single-channel | 3 |
| ECC SupportError-Correcting Code memory — prevents data corruption | Yes |
| Integrated GPUBuilt-in graphics processor | No |
| Compatible ChipsetsMotherboard chipsets that support this CPU | Intel X58,Intel 5520 |
| Max CPUs in ConfigMulti-socket support for servers | 2 |
Advanced Features
The Xeon X5647 is primarily designed for Workstation. Virtualization: VT-x, VT-d — enables running virtual machines efficiently (important for development and server workloads). Its primary market competitor is the Core i7-980X.
| Specification | Xeon X5647 |
|---|---|
| Primary Use CaseIntended workload category | Workstation |
| OverclockingWhether CPU clock can be manually increased | 🔒 Locked |
| AVX-512Advanced vector instructions for AI/ML workloads | ❌ Not Supported |
| VirtualizationHardware-assisted virtualization technology | VT-x, VT-d |
| Direct CompetitorMarket equivalent from rival manufacturer | Core i7-980X |
Power & Cooling
The Xeon X5647 has a rated TDP (Thermal Design Power) of 130 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed. No stock cooler is included — you will need to purchase an aftermarket cooler separately. Recommended cooling: Tower 140mm.
| Specification | Xeon X5647 |
|---|---|
| TDPThermal Design Power — heat output under sustained workload | 130 Watt |
| Max TemperatureMaximum safe junction temperature (Tjmax) | 80 °C |
| Included CoolerStock cooler bundled in the box | No |
| Recommended CoolerSuggested aftermarket cooling solution | Tower 140mm |
Value Analysis
It currently holds Rank #593 in the overall cost-benefit ranking — this ranking factors in performance-per-dollar relative to all available processors. Performance ranking position: #1948 out of all indexed processors.
| Specification | Xeon X5647 |
|---|---|
| Launch PriceOriginal retail price at launch | $175 |
| Cost-Benefit RankPosition in overall value ranking | #593 |
| Performance RankPosition in overall performance ranking | #1948 |
| Release DateLaunch date | 14 February 2011 (14 years ago) |
| Release Year | 2011 |
| DesignerArchitecture designer (e.g. Intel, AMD) | Intel |
| ManufacturerFabrication foundry (e.g. TSMC) | Intel |
Similar Performance
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Our Recommendation for Xeon X5647
Suggested pairings based on performance balance
Minimum (Avoid Bottleneck) (12)
Recommended (Balanced) (12)
High-End (Max Performance) (12)
Popular Comparisons
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