The leaked spec in full: (Microsoft has not made an offiial announcement yet so these are considered rumours, but most of this follows the same outline as previously reported.)
A complete, top-to-bottom list of Durango features for your reading pleasure.
Central Processing Unit:
x64 Architecture
Eight CPU cores running at 1.6GHz
Each CPU thread has its own 32 KB L1 instruction cache and 32 KB L1 data cache
Each module of four CPU cores has a 2 MB L2 cache resulting in a total of 4 MB of L2 cache
each core has one fully independent hardware thread with no shared execution resources
each hardware thread can issue two instructions per clock
Graphics Core:
custom D3D11.1 class 800-MHz graphics processor
12 shader cores providing a total of 768 threads
Each thread can perform one scalar multiplication and addition operation (MADD) per clock cycle
At peak performance, the GPU can effectively issue 1.2 trillion floating-point operations per second
High-fidelity Natural User Interface (NUI) sensor is always present
Storage and Memory:
8GB of DDR3 RAM (68GB/s bandwidth)
32MB of fast embedded SRAM (ESRAM) (102GB/s)
From the GPU's perspective the bandwidths of system memory and ESRAM are parallel providing combined peak bandwidth of 170GB/sec.
Hard drive is always present
50GB 6x Blu-ray drive
Networking:
Gigabit Ethernet
WiFi and WiFi Direct
Hardware Accelerators:
Move engines
Image, video, and audio codecs
Kinect multichannel echo cancellation (MEC) hardware
Cryptography engines for encryption and decryption, and hashing
-Daniel, Jedi Editor
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