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AMD Athlon X4 620

Posted September 28, 2009 by Jake in CPU & Motherboards







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by Jake
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Specifications & Features

The specifications for the AMD Athlon II X4 620 are as follows:

  • Model Number: Athlon II X4 620
  • Clock Frequency: 2.6GHz
  • 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)

The 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 move to 45nm process, this allows the Athlon II X4 to run at lower voltages and higher frequencies, and the 620 with a stock clock speed of 2.6GHz, 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.

With the Athon II X4 obviously a budget chip, the distinction between it and the flagship Phenom II chips are essentially found in the cache. There isn’t much difference in the outward physical appearance, so the internals are where they diverge. 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. We know that the L3 can supplement the chip’s horsepower considerably in some applications, so we’ll see during testing what sort of difference this makes today for the Athlon II X4.

AMD is currently listing both an X4 620 and X4 630 as the available models in their budget arsenal, and each are identical except for clock speeds. The 620 comes in at 2.6GHz, while the 630 is clocked at 2.8GHz. As you’ll soon see during our overclocking sessions, these Athlon II chips have some serious overhead potential, so we actually recommend the 620 model, as it’s not only cheaper but can far exceed the extra 200MHz of the 630 without even batting an eye.

With that said, let’s look at the setups and test systems, and get this chip juiced up.

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