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  • AMD Phenom II X4 955 HDZ955FBGIBOX 3.2 GHz/6 MB L3/125W Processor
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AMD Phenom II X4 955 HDZ955FBGIBOX 3.2 GHz/6 MB L3/125W Processor

by AMD
| 3 answered questions

Available from these sellers.
  • Quad Core, AM3 Package
  • 3.2Ghz, 8MB Cache
5 used from $88.97 1 refurbished from $105.00

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Technical Details

  • Brand Name: AMD
  • Model: HDZ955FBGIBOX
  • Processor Count: 4
  • Cache Memory Installed Size: 6 MB
  • Warranty: 3 years
  See more technical details

Product Details

  • Product Dimensions: 0.4 x 0.4 x 0.4 inches ; 5.6 ounces
  • Shipping Weight: 1.2 pounds
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B00275G0VE
  • Item model number: HDZ955FBGIBOX
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (40 customer reviews)
  • Date first available at April 2, 2004

Product Description

From the Manufacturer

Ideal for enthusiasts and casual users alike, the AMD Phenom II X4 955 offers multicore processing power at a budget-friendly price. Featuring four cores running at 3.2 GHz each, the processor blows through all the latest benchmarks. It also has a versatile AM2+/AM3 socket and is compatible with a wide range of motherboards. Loaded with performance-boosting technologies, the X4 955 will take your PC experience to the next level.

callout box top
AMD Phenom II X4 955 Quad-Core Processor
At a Glance:

  • Four 3.2 GHz cores for blazing-fast processing
  • High overclocking ceiling offers enthusiasts flexibility
  • Fast, ultra-wide bandwidth for quick memory access
  • Designed to handle next-gen games
  • Quiet, cool, and energy efficient
callout box bottom

AMD Phenom II X4 955 Quad-Core Processor

AMD Phenom II X4 955 Processor
Four 3.2 GHz cores for blazing-fast processing.
AMD Phenom II X4 955 Processor
Fast, ultra-wide bandwidth for quick
memory access.
Four Powerful Processing Cores

With the Phenom II X4 series, AMD engineers have combined four cores into a single processor, giving you enough processing muscle for even the most highly threaded applications. Each core is equipped with 512K L2 cache, and all four cores share 6MB L3 smart cache between them. AMD has also included an ultra-wide, 4000MT/s bandwidth--enough to support all four cores effectively.

For users, this means that you'll be able to run all the latest software without the slowdown you'd experience with an inferior processor. Your computer will be able to handle multiple programs at once, and high-definition media players and video editors will run smoothly and efficiently. You'll also be able to enjoy next-gen games without any frame-rate hiccups.

The X4 955 also has a high overclocking ceiling, giving enthusiasts plenty of headroom to increase their chip's frequency. With a little tweaking, you can lift your processor's performance to even greater heights.

Cutting-Edge Technologies for Faster Processing

The Phenom II X4 also makes use of several other performance-boosting technologies, including:

  • HyperTransport Bandwidth: Speeds up communication between the processor and memory, improving overall system performance.
  • Integrated Memory Controller: Actively scales bandwidth uses to match your computing needs, dramatically reducing slowdown.
  • 128-bit Floating-Point Unit (FPU): Allows processor to execute floating-point calculations with extreme speed.
Gaming without Slowdown

PC gaming continues to improve at a breakneck rate, with graphics, physics, and AI growing more realistic each year. But you'll need more than just a good graphics card to keep up with the latest games. For certain games that are heavily threaded, a slow CPU can quickly become a bottleneck for performance and can ruin your gaming experience.

Fortunately, the Phenom II X4 series has been specifically designed to handle CPU-intensive games. With its multiple cores, the processor can manage thousands of high-speed gaming calculations at once. The result is a smooth, immersive gaming experience, free of any stuttering or latency.

The Ultimate in Energy-Efficiency and Cooling

AMD products are known for their stellar energy efficiency and the Phenom II X4 955 is no exception. The processor features AMD's proprietary PowerNow and CoolCare technology, which allow the processor to smartly regulate its own energy consumption. Having an energy-efficient computer doesn't just help keep costs down; it also generates less heat and helps your computer to run more quietly. It will even prolong your processor's life cycle, so you can enjoy it for years without having to worry about degradation.

The AMD Phenom II X4 955 Processor is backed by a three-year warranty.

What's in the Box

Phenom II X4 955 Processor and user manual

Phenom Processor Family
 Processor FrequencyNumber of Processing CoresL3 Cache SizeTDPUnlocked MultiplierTurbo Core Technology Socket
AMD Phenom II X6 1090T Black Edition3.2 GHz66MB125 WYesYesAM3
AMD Phenom II X6 1055T2.8 Ghz66MB125 WNoYesAM3
AMD Phenom II X4 965 Black Edition3.4 GHz46MB125 WYesNoAM3
AMD Phenom II X4 955 Black Edition3.2 GHz46MB125 WYesNoAM3
AMD Phenom II X4 9553.2 GHz46MB125 WNoNoAM3
AMD Phenom II X4 9453.0 GHz46MB95 WNoNoAM3

Product Description

True quad-core enabling cores communicate at die level. Direct Connect Architecture directly connects the processors, the memory controller and the I/O to the CPU. Enable simultaneous 32- and 64-bit, Integrated Memory Controller. Increases performance by reducing memory latency, Scales memory bandwidth and performance, HyperTransport Technology provides up to 16.0GB/s peak bandwidth/processor, reducing I/O bottlenecks, Up to 37GB/s processor-to-system bandwidth. Shared L3 cache (either 6MB or 4MB), 512K L2 cache/core, Shortening access times to highly accessed data. 128-bit FPU. BENEFIT: Larger data paths and quicker floating point calculations. One 16-bit link at up to 4000MT/s, Up to 8.0GB/s HyperTransport I/O bandwidth; Up to 16GB/s in HyperTransport Generation 3.0 mode, Up to 37GB/s processor-to-system bandwidth (HyperTransport bus + memory bus). BENEFIT: Quick access times to I/O. A high-bandwidth, low-latency integrated memory controller supports PC2-8500 (DDR2-1066); PC2-6400 (DDR2-800), PC2-5300 (DDR2-667), PC2-4200 (DDR2-533) or PC2-3200 (DDR2-400) SDRAM unbuffered DIMMs ¿ AM2+, Support for unregistered DIMMs up to PC2 8500(DDR2-1066MHz) and PC3 10600 (DDR3-1333MHz) ¿ AM3, Up to 17.1GB/s memory bandwidth for DDR2 and up to 21GB/s memory bandwidth for DDR3. Enhanced power management features automatically and instantaneously adjust performance states and features based on processor requirements enabling cooler and quieter platform designs. Power can be switched on or off within a single clock cycle, saving energy with no impact to performance. i.e, the memory controller can turn off the write logic when reading from memory, Works automatically without the need for drivers or BIOS enablement. Enables efficiency by dynamically activating or turning off parts of processor. Separate power planes for cores and memory controller, Improving efficiency by providing on demand memory performance while still allowing for decreased power consumption.

Customer Questions & Answers

Customer Reviews

4.8 out of 5 stars
5 star
4 star
3 star
2 star
1 star
See all 40 customer reviews
I have been using my old desktop for 7 years, and it served me well for that time.
Overall very happy with my purchase, processor performs very well, I'm not sure why anyone would want something faster.
P. Cameron
Just a few can use 4 or more cores, so for the time being this is the best value choice.
Edgardo Pichardo

Most Helpful Customer Reviews

80 of 85 people found the following review helpful By Linguaphile on January 3, 2010
Verified Purchase
NOTICE: In fact, This is the old version of the 955, not the new version as Amazon claims. The new version is here AMD Phenom II X4 955 Black Edition Deneb 3.2 GHz 4x512 KB L2 Cache Socket AM3 125W Quad-Core Processor - Retail HDZ955WFGBMBOX and it's more than $100 cheaper, just google for "HDZ955WFGBMBOX" and you will see the difference. The M in the model "GBMBOX" marks the difference between the C2 revision of this processor (the GIBOX) and the C3 revision (the GBMBOX). The reason Amazon has the wrong listing is because AMD did mislabel the two processors at first, but later corrected the error on their website, but Amazon didn't update theirs. The new revision mainly brings some minor tweaks, but paying an extra $100 for the old version is simply ridiculous.


A lot of reviews online are written by computer hardware enthusiasts. Think of it as asking a person who testdrives Ferrari's for a living for advice when you want to buy a car for your everyday commuting needs, and she will probably start telling you how bad Toyota Prius is without paying attention to cost or your needs. In the world of processors, this is a very good BMW that you manage to buy at a very cheap price.

I don't play high-end games at full resolution on a 55 inch plasma tv, and neither do I have liquid nitrogen around to cool my processor down. It's not that this Phenom can't do that, but we're not really going to drive this BMW *ahem* Phenom at 500 miles down the highway, so an average person doesn't need an intel i7, especially that i7's, despite being more powerful, are far more expensive. Also keep in mind that an i7 requires triple channel memory and an expensive motherboard.
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21 of 22 people found the following review helpful By P. Lam on May 19, 2009
I paired this CPU up with my Asus M4A79T. This was a huge improvement from my old processor, the Pentium D 820. There is a lot of head room when I got this to 3.6ghz easy. That was as far as I able to get stable on stock cooler, stock voltage. This is no i7 but it sure competes with the q9xxx series Intel CPUs. I hear this chip has a hard time going past 4.0ghz on air on a 64 bit OS. I'd have to try it out after I get a good heat sink fan.

Phenom II X4 955 BE @3.6ghz /w stock cooler
Asus M4A79T Deluxe
1600mhz Corsair 9 9 9 24
4890 Sapphire 1gb ddr5
WD Caviar Green 750gb 16mb
850w Corsair tx series
Lancool PC-K7B
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13 of 14 people found the following review helpful By P. Cameron on August 19, 2009
This CPU was used for first build. The processor itself is very easy to install, stock cooler was a little tougher.

CPU is very fast and able to run anything without a hiccup. Even when running a torture test I was still able to play songs in iTunes, watch a movie, or play a game without any hesitation from the processor.

My only problem was when running prime 95 processor would creep above 60C with stock cooler, I was thinking the thing was defective and thought about returning it. Tried re-seating the stock cooler and used arctic silver as my thermal compound instead. Still kept going above 60C.

Decided to try under-volting and was able to get the chip to idle under 40 and no higher than 54 at full-load which alleviated my concern that I had a faulty product. Will be buying an after market cooler soon.

Overall very happy with my purchase, processor performs very well, I'm not sure why anyone would want something faster.

Gigabyte GA-MA770T-UD3P
Phenom II x4 955
Western Digital 1TB 32MB Cache
Radeon 1 GB HD 4870
OCZ DDR3 1600 MHz
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9 of 9 people found the following review helpful By Antal Mak on September 14, 2009
wonderful cpu, goes fast, very stable, 4 cores! i usually dont use more than 2 cores and i havent used more than 3, unless im load testing or benchmarking... OCed to 3.71 ghz with the coolermaster v8 (on a side note, buy it, its awesome) i havent seen my cpu hit 50C yet and ive fully loaded it and the vcore is up to 1.45! its an amd product so you know its great, i bought this cpu when it first came out thinking that ya its amd so its good... now im so pleased with this product i would have paid $300 for it!(i paid about $220 when it came out) i highly recommend this cpu, and i would recommend the 965 but i havent personally put it through its paces so i cant really say. i assume the 965 is just as good if not better because it is an amd product
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5 of 5 people found the following review helpful By Paul K. Mckneely on February 10, 2010
Verified Purchase
After six years of using a Pentium 4 running XP I finally decided it was time to build a 64-bit quad-core system. There had been so many complaints about Vista that I decided to wait for Windows 7 to come out before building my next system. I'm glad I did because it took that long for all my requirements to fall into place:

1) Reasonably priced 4GB DDR3 modules.
2) Motherboards supporting at least 16GB of DDR3
3) Windows 7-64
4) Mature Quad-Core Processor

So in January of 2010, I began to purchase the parts to build "The Dragon". I had originally decided to buy a Phenom II X4 940 but placed a 955 in my Gold Box for less than the 940. Not an over-clocker, I planned to go stock all the way. However, it is in meeting the demands of over-clockers that would ensure that the system I buy will have the margins built in to make it very reliable and last a very long time. "Dragon" is actually a code name for the AMD 790FX chip set that was designed to support the Phenom II on mother boards supporting DDR3. But I stumbled across a CoolerMaster HAF 932 AMD colaborative limited edition that I just had to have. This is what turned my system into the "Red Dragon". Now the system has been up and running Windows 7 for over a week now and I am very satisfied with it.

Haf Amd Edition Red Dragon

Let me share a few tidbits with you. AMD's main competition comes for the Intel i5/i7 CPUs. The i7 seems to have a more powerful processor but costs significantly more. Because competition is good for the industry, I recommend for people who are building their own systems to buy a Phenom II because it is a really great product.
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