Okay a few things that might not make me seem so incredibly wrong :S Firstly 1333MHz memory is too slow, 1600MHz is the sweet spot and we have found this in the past when conducting far more extensive memory testing that what was shown in that thread. 1866MHz offers a slight bump in performance over 1600MHz but only very slight and we are talking only when using the high-end APU’s. Beyond 1866MHz we saw next to no improvement in our tests. Now with the A4-5000 processor which was tested with 1600MHz memory, changing the memory to 1866MHz had no impact on performance at all. The GPU side of things was simply to slow to require more bandwidth, the GPU clock needs to be increased in order to take advantage of faster clocked memory. The A8-3510MX processor featuring the Radeon HD 6620G which was used for testing in the thread you linked is considerably more complex than that of the A4-5000 and it is backed by a much faster processor. Finally don't just take my word for it, here are Legit Reviews results from way back... http://www.legitreviews.com/article/1652/6/ Note how there is a big jump from 1333MHz to 1600MHz and then nothing from 1600MHz to 1866MHz.