I searched around, and there's no information that points exactly to the suggested, minimum, or otherwise dated information containing specifications on this.

I want to install a newer version of Android on an older ZTE-X500 MetroPCS smartphone. However, I'd like to know the backwards compatibility in regards to using a newer featured OS with lackluster, limited hardware compared to today's smartphones, such as Galaxy S4.

However, I still wish to do this. If Jelly Bean is too demanding, I will set up Honeycomb, or get a modified Honey Comb ROM, or tweak the source to my preferences.

However, nothing outlines the specifics of the "system requirements" it suggests for optimum performance, such as RAM, processor speed, processor features, and/or any other features, like DMA, video circuit advancements, and/or sound and special hardware requirements noted as well.

Please, if you will, point me to a source that mentions this, and please tell do not link me to any PDF file formats. Thank you.

PS: I'm a computer programmer.