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AMD Xbox One GPU

Graphics Processor
Durango
Cores
768
TMUs
48
ROPs
16
Memory Size
8 GB
Memory Type
DDR3
Bus Width
256 bit
GPU Chip
GPU
Back
Back
The Xbox One GPU was a high-end gaming console graphics solution by AMD, launched in November 2013. Built on the 28 nm process, and based on the Durango graphics processor, in its X871363-001 variant, the device supports DirectX 11.2. The Durango graphics processor is a large chip with a die area of 363 mm² and 5,000 million transistors. It features 768 shading units, 48 texture mapping units, and 16 ROPs. AMD includes 8 GB DDR3 memory, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 853 MHz, memory is running at 1066 MHz.
Its power draw is rated at 95 W maximum. The console's dimensions are 333 mm x 274 mm x 79 mm, and it features a igp cooling solution. Its price at launch was 499 US Dollars.

Graphics Processor

GPU Name
Durango
GPU Variant
X871363-001
Architecture
GCN 1.0
Foundry
TSMC
Process Size
28 nm
Transistors
5,000 million
Die Size
363 mm²

Graphics Card

Release Date
Nov 22nd, 2013
Generation
Console GPU
(Microsoft)
Production
End-of-life
Launch Price
499 USD
Bus Interface
IGP

Clock Speeds

GPU Clock
853 MHz
Memory Clock
1066 MHz
2.1 Gbps effective

Memory

Memory Size
8 GB
Memory Type
DDR3
Memory Bus
256 bit
Bandwidth
68.22 GB/s

Render Config

Shading Units
768
TMUs
48
ROPs
16
Compute Units
12

Theoretical Performance

Pixel Rate
13.65 GPixel/s
Texture Rate
40.94 GTexel/s
FP32 (float) performance
1,310 GFLOPS

Board Design

Slot Width
IGP
Length
333 mm
13.1 inches
Width
274 mm
10.8 inches
Height
79 mm
3.1 inches
Weight
3.5 kg (7.8 lbs)
TDP
95 W
Suggested PSU
350 W
Outputs
No outputs

Graphics Features

DirectX
11.2 (11_0)
OpenGL
N/A
OpenCL
1.2
Vulkan
1.1
Shader Model
5.1

Durango GPU Notes

Architecture Codename: Sea Islands
CLRX Version: GCN 1.0

Instruction issue rate:
12 SCs * 4 SIMDs * 16 threads/clock = 768 ops/clock

FLOPs:
768 ops/clock * (1 mul + 1 add) * 800 MHz = 1.2 TFLOPS

Interpolation:
(768 ops/clock / 2 ops) * 800 MHz = 307.2 Gfloat/sec

Triangle rate:
2 tri/clock * 800 MHz = 1.6 Gtri/sec

Vertex rate:
2 vert/clock * 800 MHz = 1.6 Gvert/sec

Vertex/buffer fetch rate: (4 bytes)
4 elements/clock * 12 SCs * 800 MHz = 38.4 Gelement/sec

Vertex/Buffer data rate from cache:
38.4 Gelements/sec * 4 bytes = 153.6 GB/sec

Peak throughput from main RAM:
68.2 GB/sec

Peak throughput from ESRAM:
128 bytes/clock * 800 MHz = 102.4 GB/sec

ESRAM size:
32 MB

GSM size:
64 KB

LSM size:
12 SCs * 64 KB = 768 KB

L2 cache size:
4 x 128 KB = 512 KB (shared)

Bilinear fetch rate: (4 bytes)
4 fetches/clock * 12 SCs * 800 MHz = 38.4 Gtexels/sec

Bilinear data rate from cache:
38.4 Gtexels/sec * 4 bytes = 153.6 GB/sec

L1 cache size:
16 KB/SC * 12 SCs = 192 KB (nonshared)

Pixel clear rate:
1 8×8 tile/clock * 4 DBs * 800 MHz = 204.8 Gpixel/sec

Pixel hierarchical Z Rate:
1 8×8 tile/clock * 4 DBs * 800 MHz = 204.8 Gpixel/sec

Sample Z rate:
16 /clock * 4 DBs * 800 MHz = 51.2 Gsample/sec

Pixel rate:
4 /clock * 4 DBs * 800 MHz = 12.8 Gpixel/sec