As is usual with Apple, they've not mentioned the amount of RAM in iPhone 4S at either the Let's Talk iPhone event or in the specs online. Rumors have suggested it has 1GB of RAM but it appears that it may only have 512MB, the same amount as the iPhone 4 and the iPad 2. The information comes from an interview with Chair Entertainment’s creative director Donald Mustard who had been involved in the development of Infinity Blade 2 demo shown off at the event.
I’m still shocked that, with the iPhone 4S, I’m literally running around with a 1080p video camera in my pocket, with an eight megapixel camera, 64GB of hard drive space and an A5 chip with 512MB of memory. This is a really powerful computer, right?
Now before we get too upset by the amount of RAM, let’s remember that the iPad 2 has the same A5 processor and 512MB of RAM. It certainly doesn't hang around when it comes to number crunching and gaming performance. One question does spring to mind though, why is Siri not coming to the iPad 2? There doesn't appear to be any specification anomalies to prevent it from working and it would certainly be a great addition to the iPad 2.