These are the rumored specs of the next Xbox 720
Xbox 720 Tech Specs
Three SOCs in one console. Two "Venus" models, and one "Mars".
8GB RAM, with 1GB devoted to operating system.
Mars SOC - System SOC
GPU AMD 8850 spec GPU clocked at 600mhz
4 core CPU is clocked @ 1.8GHz. It is an x86 system.
Audio DSP
2 of Venus SOC - Application SOC
GPU AMD 8900 spec GPU clocked at 800mhz with 10000HD series future tech
4 core CPU is clocked @ 2.5GHz
1.5 Gb of GDDR5 ram on each SOC (total 3GB) clocked @ 1.2Ghz
Xbox 720's "Oban" is a game changer for Microsoft
The name Oban was revealed a couple of months back, and was believed to be the name of the chips onboard the Xbox 720.
According to this insider, however, Oban is actually the name of the blitter inside the next-gen machine.
A blitter is a system built into hardware designed to improve the speed at which data is transferred within the hardware's memory. It is a separate system from the CPU and can run parallel to it, moving large amounts of data relatively quickly.
The Xbox 720 will be a 356-bit system - compared to the PS4's 256-bit system - and is capable of 550GB of data per second.
The insider claims it is designed for raytracing, and with the Oban and the higher bus speed of the GPU this will put it on top in terms of technical prowess.
Xbox 720 is designed for ray tracing technology
Ray tracing is a high-end lighting technology that isn't widely used in games today. Unlike the current dynamic lighting system - which recreates the effects of lighting - ray tracing emulates the science of light.
In other words, more realistic reflections and refractions can be created to create more realistic looking lighting.
The problem is it's a very intensive technology that takes a very long time to render and is primarily used in Pixar films. If the Xbox 720 is as powerful as this suggests, then ray tracing will be more possible with the hardware.
The insider claims that Microsoft has designed the Xbox 720 with ray tracing in mind, however admits that "the hardest part will be for studios to work with ray traced graphics enabled engines."
http://www.nowgamer.com/news/1769561/nextgen_huge_xbox_720_ps4_specs_report_by_insider.html