Originally Posted by Brutuz
Actually both are Cortex-A9 based and mostly built from the reference design with a few tweaks here and there.
I see, so it is the same CPU architecture. I disagree somewhat though, that there are only a few tweaks here and there on Apple's part. I believe it to be more along the lines of some changes and removal of unnecessary features, as well as plenty of tweaking. I expect there is a lot of tweaking with the PowerVR GPUs, too.
That's what Intrinsity specialises in, and they acquired them. We'll see how it performs soon enough though, I may be wrong. But based on what I've read and learned since the introduction of the first iPad, this is what I think is correct.
Originally Posted by bencher
The A5 is a 1ghz cpu running at 800 mhz in the ipad 2. I thought you would know that.
Just the same as the a4 is a 1ghz cpu running at 736 mhz in the iphone 4.
Yes you are correct about the gpu.
Mmm, no. The A5 runs at 1GHz in the iPad 2 as it says on Apple's website. The clock speed however is dynamic and changes based on workload, which is why when benchmarked it varies. I believe this is true also with the A4. The iPad 1 runs at 1GHz, and the iPhone 4 runs at 800MHz.
The A4 and A5 is not a CPU but a SoC. The A5 includes the CPU, as well as other packages such as the RAM and GPU.