This processor supports a QPI (QuickPath Interconnect) speed of 6.4 GT/s, enabling fast communication between the CPU and other components like memory and the chipset. Moreover, it uses the FCLGA1366 socket, ensuring compatibility with motherboards built for Intel’s Nehalem-based Xeon processors. With a TDP of 95W, it balances performance and power consumption, making it ideal for enterprise servers. In addition, it supports triple-channel DDR3 ECC Registered memory, which enhances memory bandwidth for improved system reliability. 

Key Features:

• 2.66 GHz Clock Speed 

• 4 Cores / 8 Threads

• 8 MB L3 Cache 

• 6.4 GT/s QPI Speed 

• FCLGA1366 / PLGA1366 Socket Type

• 95W TDP

• Hyper-Threading Supported

• Turbo Boost Technology Supported

• Intel VT-x and VT-d Virtualization Support

• Triple-channel DDR3 ECC Registered Memory Support

Compatibility: The IBM 44T1885 Intel Xeon X5550 Processor is compatible with:

• Compatible socket: FCLGA1366 (LGA 1366)  

• Compatible chipsets: Intel 5520, 5500 (Tylersburg) 

• Compatible motherboards: LGA 1366 server/workstation boards from IBM, Dell, HP, Supermicro, ASUS 

• Memory support: DDR3 ECC registered (usually triple-channel) 

• Incompatible with: LGA 115x, newer Intel sockets (1200, 1700), AMD sockets. 

Specifications: 

• General

• Model: X5550

• Product Name: Intel Xeon Processor X5550

• Product Type: Server/Workstation CPU (Quad-core Processor)

• Part Number: 44T1885 (IBM-specific part number)

• Brand: Intel

Processor Specifications

• Core Count: 4 cores (Quad-core)

• Thread Count: 8 threads (Hyper-Threading enabled)

• Base Clock Speed: 2.66 GHz

• L3 Cache Size: 8 MB

• QPI (QuickPath Interconnect) speed: 6.4 GT/s

Socket and Compatibility

• Socket Type: FCLGA1366 (LGA 1366)

• Compatible Chipsets: Intel 5520, Intel 5500 (Tylersburg)

• Compatible Motherboards: Server/workstation boards from IBM, Dell, HP, Supermicro, ASUS

• Platform Target: Enterprise servers and workstations
  

Memory Support 

• Memory Type: DDR3 ECC Registered (RDIMM)

• Memory Channels: Triple-channel architecture (depends on motherboard)

• Maximum Memory Speed: DDR3-1066 MHz officially

• ECC Support: Yes, for error correction in servers

• Maximum Memory Capacity: Up to 48-96 GB (varies by motherboard)

Interconnect and Technologies 

• QuickPath Interconnect (QPI) Speed: 6.40 GT/s

• Hyper-Threading Technology: Supported (2 threads per core)

• Turbo Boost Technology: Not supported

• Virtualization Support: Intel VT-x

• Thermal Design Power (TDP): 95 Watts

Instruction Set and Extensions

• Base Instruction Set: 64-bit x86 (Intel 64)

• SIMD Extensions: SSE4.2 supported

• AES-NI: Supported (hardware acceleration for encryption)

• VT-d: Supported (Directed I/O virtualization)

• Execute Disable Bit: Supported (security feature)

Thermal and Power 

• Thermal Power Design (TDP): 95 Watts 

• Maximum Operating Temperature: ~73.1°C

• Cooling Solution: Requires a compatible LGA 1366 CPU cooler

• Power Management Features: Intel SpeedStep Technology

• Voltage Range: Approx. 0.85V to 1.4V 

Performance and Usage

• Launch Date: Q3 2009

• Architecture: Nehalem (45nm process)

• Target Market: Servers, high-performance workstations

• Overclocking Potential: Limited (mainly server use, not enthusiast OC)

• Benchmark Performance: Comparable to Core i7 920 in single-thread; excellent multi-thread for its generation
  

If you are looking for a reliable quad-core processor with Hyper-Threading technology for legacy server or workstation systems, then the IBM 44T1885 Intel Xeon X5550 Processor is an excellent choice. Server Tech Central deals in dependable processing solutions, ensuring efficient performance, robust speed, and long-term durability. We deliver high-performance server processors that meet your demanding computing needs. 

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