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Item#: N82E16813130292

MSI P55A-G55 LGA 1156 Intel P55 SATA 6Gb/s USB 3.0 ATX Intel Motherboard

  • Intel P55
  • Core i7 / i5 / i3 / Pentium (LGA1156)
  • DDR3 1066/1333/1600 (OC)/1800 (OC)/2000 (OC)/2133 (OC)
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Build your next computer with the powerful P55A-G55 motherboard by MSI.

Take advantage of the powerful multi-core Intel i7 and i5 processors with this board's 1156 socket. You'll benefit from the most powerful and fastest video processing around when you install two ATI video cards in CrossFireX configuration. You'll also get more power from the OC Genie with Super Unlock that releases the potential of your CPU in an easy and simple way. And thanks to the dual channel, up to 16GB DDR3 memory support, onboard USB 3.0 and Gigabit Ethernet ports, the SATA 6Gbps support and lossless HD audio, this board offers everything you need to build your power system. Plus, the military class components add unparalleled durability and reliability to this board.

  • newegg Military Class Components The Military Class Components powered motherboard features the highest quality components in the industry including server-grade Solid Cap for incredible stability and lifespan, and icy choke for lower temperature, improved power efficiency and better overclocking potential.
  • newegg OC Genie with Super Unlock MSI’s OC Genie combines push-button and dedicated overclocking processor to offer easy and quick overclocking. Just push the OC Genie button, OC Genie processor will automatically detect the best overclocking setting including CPU clock, CPU voltage, memory clock and memory voltage, and boost system performance in one second. No software or complicated BIOS tweaking required. And the Super Unlock can improve the ratio of unlocked CPU (Core i7-875K & Core i5-655K) for a more performance boost.
  • newegg SuperSpeed USB 3.0 Technology The MSI P55A-G55 equips the revolutionary SuperSpeed USB 3.0 technology to deliver up to 5Gbps bandwidth which is 10x faster than USB 2.0 boosts data transfer rate between the PC and USB device.
  • newegg SATA 6Gb/s Compliant The MSI P55A-G55 features next-generation SATA Revision 3.0 compliant internal SATA ports to provide 6Gb/s data transfer rates for optimal performance, efficiency, convenience and flexibility.
  • newegg Green Power Saving Technology The MSI P55A-G55 features APS (Active Phase Switching) energy saving technology for controlling power supply with auto phrase switching for CPU and other components.
  • newegg ATi CrossFireX Multi-GPU Technology Support ATi CrossFireX is the ultimate multi-GPU performance gaming platform, enabling two or more discrete graphics processors to work together for boosted system performance and a breakthrough gaming experience.

Learn more about the MSI P55A-G55



Supported CPU

CPU Socket Type
LGA 1156
CPU Type
Core i7 / i5 / i3 / Pentium (LGA1156)


Intel P55


Number of Memory Slots
Memory Standard
DDR3 1066/1333/1600 (OC)/1800 (OC)/2000 (OC)/2133 (OC)
Maximum Memory Supported
Channel Supported
Dual Channel

Expansion Slots

PCI Express 2.0 x16
2 (x16/ x0 or x8/ x8 )
PCI Express x1
PCI Slots

Storage Devices

1 x ATA133 2 Dev. Max
SATA 3Gb/s
SATA 6Gb/s
2 x SATA 6Gb/s
SATA 3Gb/s: RAID 0/1/5/10
SATA 6Gb/s: RAID 0/1

Onboard Video

Onboard Video Chipset

Onboard Audio

Audio Chipset
Realtek ALC892
Audio Channels
8 Channels

Onboard LAN

LAN Chipset
Realtek 8111DL
Max LAN Speed

Rear Panel Ports

USB 3.0
2 x USB 3.0
USB 1.1/2.0
8 x USB 2.0
1 x Optical
Audio Ports
6 Ports

Internal I/O Connectors

Onboard USB
2 x USB 2.0 connectors (4 ports)

Physical Spec

Form Factor
12" x 9"
Power Pin
24 Pin


APS (Active Phase Switching) offers more than 93% power saving

Winki 2.0 provides an easy-to-use internet environment

Support USB 3.0 & SATA 6Gb/s

Supports ATI Crossfire

Manufacturer Warranty

3 years limited
3 years limited

Quick Info


  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years

Customer Reviews of the MSI P55A-G55

Do you own this product? Write a Review

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  • Noelle M.
  • 9/27/2010 10:45:16 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsFantastic, apart from one thing.

Pros: Fits in the NZXT M59 case like a glove, plenty of room for 2x460s, boots nice and quick and has excellent over-clocking potential.

Cons: The only reason I gave it 4/5 instead of 5/5 is because it lacks an SLI bridge, even though it's advertised that it's an SLI-ready board. It took me ages to find an SLI bridge by itself (eventually had to get one from a friend.) Sure, I could have ordered one - but the board should have come with one in the first place.

1 out of 1 people found this review helpful. Did you? Yes No

  • AJ K.
  • 9/1/2010 6:57:10 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat features for the price

Pros: SATA 6Gb/s, USB 3, RAID, Whats not to like! It does what it is advertised to do. Marvell RAID chip boots faster than any other RAID capable motherboard I have worked with.

Cons: The slow boot is mostly due to the Marvell onboard RAID chip. That is to be expected with RAID.

Other Thoughts: I haven't owned this MOBO for a month yet, so my review is a little preemptive. the MSI product page says it supports SLI, I will have to wait and see. Also Ubuntu linux does not fully support the P55 chipset, ex. I cant get suspend to work. Not a motherboard con, just something to be aware of.

1 out of 1 people found this review helpful. Did you? Yes No

  • Scott S.
  • 8/10/2010 7:18:47 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsConcerned

Pros: The Board works, it has Sata 6 ports which I wanted for my Crucial Sata 6 SSD. It is the cheapest board with this option. Shutdown and application loading now much improved (likely due to the SSD drive and better processor)

Cons: I am running an i7 750, 2 gb DDR3, and the Crucial SSD drive. Bootup is significantly SLOWER than my old CoreDuo 1.8, 2 gb DDR2, and regular 7200 hard drive running Win7. It is like the Board stalls for 5 seconds on the MSI splash screen before even trying to boot Windows.

Other Thoughts: Anyone else had this problem??? Fixes in BIOS??

2 out of 5 people found this review helpful. Did you? Yes No

  • Adam T.
  • 7/21/2010 5:28:19 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWorks Great

Pros: Works as planned.
i3/i5/i7 compatible.

Cons: None so far.

Other Thoughts: I used this Mobo to build my first PC. I wanted to do a relatively cheap build that I could upgrade later if I wanted to make a gaming PC or whatever. I'm running it with an i3/4gb ram/350w ps/cheapo ATI 4350 video card. What can I say? It worked like a charm first time I turned it on, and a few weeks later it hasnt blown up or anything. Now I have the option of putting in a nice processor or a couple of video cards if I want.

I was a little trepidatious buying this considering it had no reviews, but it works great!

11 out of 11 people found this review helpful. Did you? Yes No

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Computer Hardware > 
Motherboards > 
Intel Motherboards > 
MSI > 
Item#: N82E16813130292
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