Frankly speaking, previous generation dual-core Celeron processors performed very poorly in games. They lacked cache-memory that is known to have a serious effect on gaming performance. New Celeron processors have twice as much cache-memory, which, as you can see, has tremendous influence on the results of the gaming tests. Celeron processors based on 45 nm cores outperform Celeron processors with 65 nm cores working at the same clock frequency by about 20% in gaming applications. And if we compare the performance of Celeron E1600 against that of Celeron E3300 that has come to replace it, then we can even see a 25% performance improvement.
As a result, if back in the days Athlon X2 used to be the best choice for low-cost gaming platforms, now these times are long gone. New Celeron E3000 series can easily compete against them in performance as well as price. In this case AMD fans can only hope that at some point Athlon II X2 will eventually get into the low-end price segment, although the junior Athlon II X2 is currently priced higher than the top Celeron processor.
At the same time, you can clearly see from the diagrams that increasing L2 cache memory over 1 MB continues to have a positive effect on gaming performance. For instance, Pentium E5200 with a 2 MB L2 cache working at the same frequency as Celeron E3300 is on average 10% faster.