The second AMD CPU we are reviewing is Athlon II X4 635 (2.9 GHz), which is being offered at a higher price point (USD 126).

Even when you compare CPUs on the same price range the comparison is flawed, because you have to put the cost of the motherboard into the equation, since you have to compare the price of the whole system, not only the price of the CPU alone. We see all the time other websites publishing flawed reviews, for instance comparing CPUs that are in completely different price range (e.g., comparing these CPUs from AMD with Core i3 or Core i5 models). Since motherboards targeted to Intel systems are more expensive and since the difference in price between the motherboards we used on our review is exactly USD 20, we ended up with systems with the exact same price tag.

So we are going to compare these two CPUs to answer the big question: since the two CPUs cost the same, which one is the best? The CPU with the higher clock rate and an 元 memory cache but only two cores or the CPU without an 元 cache and lower clock rate, but with four processing cores?Īs a competitor to these two CPUs, we elected Pentium E6300, which is offered at USD 80. In fact it comes with the exact same price tag as Athlon II X4 620 (2.6 GHz), a CPU that we’ve already reviewed and proved to provide a good cost/benefit ratio. The new Phenom II X2 555 (3.2 GHz) comes with an attractive USD 99 price tag for a CPU on this clock range. Both Athlon II and Phenom II are socket AM3 CPUs, meaning that they can be installed on socket AM2+ or socket AM3 motherboards, depending on whether you want DDR2 or DDR3 memories on your computer, respectively.

The main difference between Athlon II and Phenom II is the presence of an 元 memory cache on Phenom II, making this CPU to provide a higher performance when compared to an Athlon II of same clock rate and same amount of processing cores. On AMD product line, 'X2' means that the CPU has two processing cores ('dual-core'), 'X3' means the CPU has three processing cores ('triple-core') and 'X4' means that the CPU has four processing cores ('quad-core'). Today we are going to see the performance of two new CPUs from AMD, Athlon II X4 635 (2.9 GHz) and Phenom II X2 555 (3.2 GHz), and compare it to other models from AMD and competitors from Intel.

Athlon ii x4 635 specs