Other features still include AMD Cool 'n' Quiet 3.0, AMD Balanced Smart Cache, and Direct Connect Architecture.Between the top CPU manufacturers, AMD has been producing a lot of chips over the past year or so. R. redesign Honorable. Since the Athlon II X4 640 is not a "Black Edition" with an unlocked multiplier, overclocking the system requires adjusting the voltage and the reference clock speed. Less than a month ago, we saw AMD drop a six core processor for just under $300, making it quite attractive when compared to the price tag of Intel's six core i7 980X, which retails for around a grand. The Athlon II X4 640 uses an increased multiplier of 15x, with the base clock of 200MHz . How to overclock an AMD Athlon II X4 640 processor. I also compared the X4 640 against the Athlon II X4 635 so that you can get a look at how the extra bump in speed makes much of a difference. These clock speeds will represent the overclocked scores in the testing.To test the AMD Athlon II X4 640, I subjected it to a series of strenuous benchmarks that stress the components to their peak. Here, AMD took their Athlon II Quad Core silicon and found some more speed by bumping up the multiplier up by a half, giving the CPU a 100MHz increase to take its place as the top Athlon II X4 processor. Recent Reviews. I was able to boot into the computer at 260MHz on the reference clock however; it would not remain stable. The Athlon II X4 640 still has the same L1 cache of 64KB on each core for data and instructions and a L2 cache of 512KB per core, for a total L2 cache size of 2MB. Featured Sponsors. This allows the consumer to choose exactly what is right for them, based the processor's speed and their budget.
All of the other specifications remain the same, this includes: HyperTransport 3.0 support, 45nm manufacturing process, and AM3 desig. All of the hardware was tested using the stated speeds, timings, and voltages for each test. Nuance Power PDF Standard. This makes the Athlon II X4 series quite tasty for those wanting a high performance, low cost chip. At launch, the AMD Athlon X4 640 will retail for around $122, making it an inexpensive quad core for gamers and HTPC builders alike. Sponsor Showcases. The Athlon II and Phenom II series have been causing quite a stir in the market due to their low prices, which make them a great bang for the buck. I then pushed up the reference clock 10MHz at a time, adjusting the memory divider and HyperTransport divider at the same time, keeping them at stable speeds. All of the other specifications remain the same, this includes: HyperTransport 3.0 support, 45nm manufacturing process, and AM3 desig. This is where the 640 gets its 3.0GHz rated speed. During the one hour stability test, the maximum temperature the processor reached was only 53°C, which is way below the rated 71°C maximum which makes it a very safe overclock.Each CPU has been tested for stability at the clock speeds listed when in an overclocked state. Since I wanted to find the most stable highest overclock, I pushed the voltage up to 1.44v, which is where I knew I was safe especially under water cooling. Since I wanted to find the most stable highest overclock, I pushed the voltage up to 1.44v, which is where I knew I was safe especially under water cooling. I then compared the scores to a number of other processors on the market, ranging from dual core processors to the latest hex core processors. Previous Next Sort by votes.
Oct 18, 2013 1 0 10,510 0. Now that we have seen the physical aspects of the AMD Athlon II X4 640, we can dive into its performance.There is no physical change to the AMD Athlon II X4 640 as far as the looks go, the difference is under the hood. This increase also has allowed AMD to drop the price of the older Athlon II X4 635 to sub $100 prices. I backed down the reference clock a little bit at a time until I was able to pass Prime95 for an hour with no issues.
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AMD Athlon II X4 640 overclock