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AMD Athlon II X4 640

Posted May 11, 2010 by Jake in CPU & Motherboards







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by Jake
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The specifications for the AMD Athlon II X4 640 are as follows:

  • Model Number: Athlon II X4 640
  • Clock Frequency: 3.0GHz
  • Max TDP: 95 watts
  • Cache Size:
    L1 Cache: 64K instruction and 64K data cache per core (512KB total L1 per processor)
    L2 Cache: 512KB per core (2MB total L2 per processor)

  • Process Technology: 45-nanometer SOI (silicon-on-insulator) technology
  • HyperTransport Technology Links: One 16-bit/16-bit link @ up to 4.0GHz full duplex (2.0GHz x2)
  • Memory: Integrated 128-bit wide memory controller with speeds up to 2.0GHz with Dual Dynamic Power Management
  • Types of Memory: support unregistered DIMMs up to PC2-8500 (DDR2-1066MHz) AND PC3-10600 (DDR3-1333MHz)
  • Die Size: 45nm (169mm2)
  • Transistors: 45nm (~300 million)
  • Packaging: Socket AM3 – 938-pin organic micro Pin Grid Array (micro-PGA) (Backwards compatable with AM2+ 940-pin)

Here is the CPU-Z information of the X4 640:

A notable bit of information here for the Athlon II X4 is that both DDR2 and DDR3 Dual Channel memory continue to be supported, similar to the Phenom II lineup, thus allowing AM2+ motherboards (with either Phenom or Athlon CPUs) and DDR2 to be utilized. However, moving to DDR3-capable boards later is also an option as well, so the flexibility that AMD is known for continues as usual.

With the Athon II obviously occupying the quad segment on the cheap, the distinction between them and the flagship Phenom II chips are essentially found in the cache. While the L1 and L2 caches are the same, the Athlon II is essentially handcuffed by comparison, with the absence of L3 cache, which is indeed found in the Phenom II lineup.

With the move to 45nm process, this allows the Athlon II X4 to run at lower voltages and higher frequencies, and the 640 with a stock clock speed of 3.0GHz, has a TDP of 95 Watts. This will allow the chip to run cooler than the higher-end ones we’ve seen lately, and our suspicion is this will result in higher proportional overclocks as well.

For those who have yet to notice, AMD product nomenclature goes off increments of 5 per 100MHz in clock speed, and the model numbers start with the number of their series (6 for quad cores, 4 for tri-cores, and 2 for dual cores).

So, let’s get this thing juiced up and ready to go.

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