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AMD Radeon HD 6970 X2

Antilles x2
Graphics Processor
1536 x2
Cores
96 x2
TMUs
32 x2
ROPs
2 GB x2
Memory Size
GDDR5
Memory Type
256 bit x2
Bus Width
AMD Radeon HD 6970 X2 Photo AMD Antilles Photo
The Radeon HD 6970 X2 was a graphics card by AMD, launched in January 2011. Built on the 40 nm process, and based on the Antilles graphics processor, in its Antilles XT variant, the card supports DirectX 11.2. The Antilles graphics processor is a large chip with a die area of 389 mm² and 2,640 million transistors. Radeon HD 6970 X2 combines two graphics processors to increase performance. It features 1536 shading units, 96 texture mapping units and 32 ROPs per GPU. AMD has placed 4,096 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface per GPU (each GPU manages 2,048 MB). The GPU is operating at a frequency of 880 MHz, memory is running at 1375 MHz.
Being a dual-slot card, the AMD Radeon HD 6970 X2 draws power from 3x 8-pin power connectors, with power draw rated at 375 W maximum. Display outputs include: 2x DVI, 1x HDMI, 2x mini-DisplayPort. Radeon HD 6970 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface.

Graphics Processor

GPU Name
Antilles
GPU Variant
Antilles XT
(215-0807027)
Architecture
TeraScale 3
Foundry
TSMC
Process Size
40 nm
Transistors
2,640 million
Die Size
389 mm²

Graphics Card

Release Date
Never Released
Generation
Northern Islands
(HD 6900)
Production
End-of-life
Bus Interface
PCIe 2.0 x16

Relative Performance

3%
4%
5%
6%
7%
7%
9%
12%
12%
13%
14%
14%
16%
17%
18%
19%
20%
20%
22%
23%
24%
24%
25%
29%
29%
29%
30%
30%
30%
30%
32%
34%
34%
36%
36%
36%
37%
37%
37%
38%
39%
40%
43%
44%
44%
46%
46%
47%
51%
52%
52%
53%
54%
56%
56%
57%
58%
60%
61%
62%
62%
63%
63%
68%
68%
70%
71%
71%
72%
72%
73%
73%
75%
81%
83%
86%
86%
87%
88%
90%
92%
94%
97%
98%
98%
100%
Radeon HD 6970 X2
109%
119%
121%
129%
130%
132%
133%
135%
135%
137%
138%
138%
140%
147%
150%
152%
152%
167%
170%
173%
186%
204%
211%
228%
228%
240%
268%
281%
288%
314%
357%
Based on TPU review data: "Performance Summary" at 1920x1080
Performance estimated based on architecture, shader count and clocks.

Clock Speeds

GPU Clock
880 MHz
Memory Clock
1375 MHz
5500 MHz effective

Memory

Memory Size
2 GB
Memory Type
GDDR5
Memory Bus
256 bit
Bandwidth
176.0 GB/s

Render Config

Shading Units
1536
TMUs
96
ROPs
32
Compute Units
24

Theoretical Performance

Pixel Rate
28.16 GPixel/s
Texture Rate
84.48 GTexel/s
FP32 (float) performance
2,703 GFLOPS

Board Design

Slot Width
Dual-slot
TDP
375 W
Outputs
2x DVI
1x HDMI
2x mini-DisplayPort
Power Connectors
3x 8-pin

Graphics Features

DirectX
11.2 (11_0)
OpenGL
4.4
OpenCL
1.2
Vulkan
N/A
Shader Model
5.0

Antilles GPU Notes

Chip Variant: Cayman
Graphics/Compute: GFX5
Display Core Engine: 5.0
Unified Video Decoder: 3.1

Retail boards based on this design (1)

Name GPU Clock Memory Clock Other Changes
PowerColor HD 6970 X2 Prototype 880 MHz 1375 MHz