Intel P55 Express

Intel P55 Express
Name	Intel P55 Express
Released	2009
Manufacturer	Intel Corporation
Socket	LGA 1156
Architecture	Nehalem/Arrandale support
Chipset	Intel P55
Predecessors	Intel P45
Successors	Intel P67

Intel P55 Express

The Intel P55 Express is a desktop chipset introduced by Intel Corporation in 2009 for the Lynnfield family of processors, supporting the LGA 1156 socket and marking a transition in platform design for mainstream Intel desktop systems. It bridged technologies introduced with Nehalem microarchitecture and targeted system builders, OEMs such as Dell, HP, and enthusiasts associated with brands like ASUS, Gigabyte, and MSI. The P55 played a role in the broader market alongside competing offerings from AMD and ecosystem partners including NVIDIA and controller vendors like Marvell Technology Group.

Overview

The P55 was positioned during the era of Nehalem-family processors and complemented Intel's platform strategy contemporaneous with products such as the Core i5 and Core i7 800/900 series. OEM channel adoption included system integrators like Hewlett-Packard and boutique assemblers such as Alienware and Falcon Northwest. The chipset lifecycle intersected industry events including product announcements at trade shows like Computex Taipei and reviews in publications like AnandTech, Tom's Hardware, and PCMag. Its release influenced motherboard ecosystems involving suppliers like Foxconn, Biostar Microtech, and ASRock.

Architecture and Features

P55 architecture integrated a Platform Controller Hub (PCH) design that moved certain functions traditionally in a northbridge into the processor package and southbridge equivalents, aligning with Intel design shifts evidenced in Nehalem and later designs such as Sandy Bridge. It provided native support for Direct Media Interface links between chipset and processor, multiple PCI Express lanes for add-in cards including discrete GPUs from NVIDIA and AMD, and multiple Serial ATA ports for storage devices from vendors like Western Digital, Seagate Technology, and Samsung Electronics. The chipset featured integrated support for Intel Rapid Storage Technology and options for RAID metadata compatible with controller manufacturers such as LSI Corporation and Marvell Technology Group. Platform power and thermal characteristics were examined in relation to cooling solutions from Noctua and Cooler Master used by enthusiasts.

Chipset Variants and Models

Intel offered the P55 in a single-chipset family but motherboard manufacturers produced model variants with added controllers and features. Major board lines from ASUS (such as the Republic of Gamers series), Gigabyte (UD series), MSI (MPower), and Foxconn included enhanced power delivery, overclocking utilities influenced by firmware vendors like AMI and Phoenix, and additional I/O controllers from companies such as Realtek for audio and Ethernet, and Broadcom for networking options. Third-party expansion choices enabled multi-GPU configurations using implementations of technologies like NVIDIA SLI and AMD CrossFireX where motherboard vendors licensed bridging solutions.

Motherboard Design and Compatibility

Motherboard designs for the P55 platform typically used the LGA 1156 socket and supported memory configurations with DDR3 SDRAM modules supplied by manufacturers like Corsair, Kingston Technology, and G.Skill. BIOS and EFI firmware updates were delivered via vendors including Award Software derivatives and vendor-specific utilities from ASUS, Gigabyte, and MSI. Form factors spanned ATX, microATX, and Mini-ITX implementations for chassis makers like NZXT and Cooler Master. Compatibility considerations included support for processors such as Intel Core i5-750 and integration with storage interfaces used by OCZ Technology SSDs and optical drives from Pioneer Corporation.

Performance and Benchmarks

Benchmarks for P55-based systems appeared across media outlets including AnandTech, PC Perspective, Guru3D, and TechRadar, comparing single-thread and multi-thread workloads on processors like the Core i5-750 and early Core i7 variants. Performance evaluations emphasized memory latency characteristics, I/O throughput for SATA 3Gb/s devices, and PCI Express lane allocation affecting GPU performance relative to competing AMD platforms like those using Phenom II processors. Overclocking headroom tested with aftermarket cooling from Corsair and power supplies from Seasonic demonstrated variability across motherboard VRM designs from manufacturers such as ASUS and Gigabyte and quality capacitors sourced from firms like Nippon Chemi-Con.

Reception and Legacy

At launch, critiques and praise were documented in reviews by outlets including HotHardware, Bit-tech, and The Register, noting P55's mainstream positioning compared to high-end chipsets like the X58 and later successors such as the P67. Its legacy includes influencing subsequent Intel platform integration strategies culminating in chipsets for Sandy Bridge and later families; the P55 era also shaped expectations for integrated memory controllers and PCIe allocation that affected OEM roadmaps at companies like Dell, Lenovo, and Apple Inc.. Collectors and retro-enthusiasts continue to reference P55-era boards in historical overviews alongside modern retrospectives by entities such as Ars Technica and community archives like Overclock.net.

Category:Intel chipsets