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AMD Phenom II X4 955 AM3 CPU Review

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To test the strengths and weaknesses of the new Phenom II X4 955 processor, I put it through a series of benchmarks that test the scientific and video processing capabilities. To give you a comparison to mainstream processors being used currently, I included the AMD Phenom II X4 940 and the Intel Core i7 920 processor scores. This will give you an idea where the X4 955 sits between Intel's current leader and AMD's DDR2 leading processor. All hardware used was set to its native operating speeds, timings, and voltages to keep any variables from interfering with the scores. Because of time constraints and hardware availability, the video testing phase will have some of the newer chips included, however not all of them will be shown.


Testing Setup AMD AM3 CPU:

  • Processor(s): AMD Phenom II X4 955
  • Motherboard: ASUS M4A79T Deluxe
  • Memory: Corsair XMS3 DHX DDR3 2 x 2GB 1600MHz @ 1333MHz 7-7-7-20
  • Video Card : NVIDIA GTX 260 (216)
  • Power Supply: Mushkin 800w Modular Power Supply
  • Hard Drive: 1 x Seagate 7200.11 750GB SATA w/32MB Cache
  • Optical Drive: Lite-On 8x DVD+/-RW
  • OS: Windows Vista Ultimate Edition


Testing Setup AMD AM2+ CPU:


Testing Setup I7 CPU's:


Testing Setup Core2 CPU's:


Comparison CPUs:



Overclocked settings:

  • Processor: AMD Phenom II X4 955 @ 3.792GHz (205x18.5) 1.50v
  • System Memory: Corsair XMS3 DHX @ 1366MHz (7-7-7-20)

Overclocking the Phenom II X4 955 was a lot more tedious than when I reviewed the X4 940. This processor did not like being pushed very far, no matter how much voltage I threw at it. I expected to at least be able to get 4GHz out of it, after the easily overclockable 940, but boy was I mistaken. When it came to the multiplier, anything over x18.5 and the computer would not boot at all. Even pushing the voltage on the CPU, NB and the HT I could not get any more out of it. Pushing the FSB, the system would lock up at anything past 205Mhz. It just did not want to budge. I even raised the voltages over safe operating limits and still no joy. So the final settings I ran for the overclock were 3.795GHz at 1.5v and memory speeds of 1366MHz at 7-7-7-20 timings.







  • Scientific & Data:
  1. Apophysis
  2. WinRAR
  3. SPECviewPerf 10
  4. PCMark Vantage Professional
  5. Sandra XII
  6. ScienceMark 2.02
  7. Cinebench 10
  8. HD Tune 2.55
  • Video:
  1. Far Cry 2
  2. Crysis Warhead
  3. BioShock
  4. Call of Duty World At War
  5. Dead Space 
  6. Fallout 3 
  7. Left 4 Dead
  8. 3DMark 06 Professional
  9. 3DMark Vantage

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