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AMD Radeon HD 6990

Antilles x2
Graphics Processor
1536 x2
Cores
96 x2
TMUs
32 x2
ROPs
2048 MB x2
Memory Size
GDDR5
Memory Type
256 bit x2
Bus Width
AMD Radeon HD 6990 Photo AMD Antilles Photo
The Radeon HD 6990 was a enthusiast-class graphics card by AMD, launched in March 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 6990 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 830 MHz, memory is running at 1250 MHz.
Being a dual-slot card, the AMD Radeon HD 6990 draws power from 2x 8-pin power connectors, with power draw rated at 375 W maximum. Display outputs include: 1x DVI, 4x mini-DisplayPort. Radeon HD 6990 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 295 mm in length, and features a dual-slot cooling solution. Its price at launch was 699 US Dollars.

Graphics Processor

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

Graphics Card

Release Date
Mar 8th, 2011
Generation
Northern Islands
(HD 6900)
Production
End-of-life
Launch Price
699 USD
Bus Interface
PCIe 2.0 x16

Relative Performance

3%
4%
5%
6%
7%
8%
10%
13%
13%
14%
15%
15%
17%
18%
20%
20%
21%
22%
23%
24%
25%
26%
27%
30%
31%
31%
32%
32%
32%
32%
34%
36%
36%
38%
38%
38%
39%
39%
39%
40%
42%
43%
46%
46%
46%
48%
49%
50%
54%
55%
56%
57%
57%
59%
60%
60%
61%
64%
65%
66%
66%
66%
67%
72%
73%
74%
75%
76%
76%
76%
78%
78%
80%
86%
88%
91%
91%
92%
93%
95%
98%
100%
Radeon HD 6990
102%
104%
104%
115%
127%
128%
137%
138%
140%
141%
143%
143%
145%
146%
147%
148%
156%
159%
161%
161%
177%
180%
183%
197%
217%
224%
241%
241%
255%
298%
306%
333%
379%
Based on TPU review data: "Performance Summary" at 1920x1080

Clock Speeds

GPU Clock
830 MHz
Memory Clock
1250 MHz
5000 MHz effective

Memory

Memory Size
2048 MB
Memory Type
GDDR5
Memory Bus
256 bit
Bandwidth
160.0 GB/s

Render Config

Shading Units
1536
TMUs
96
ROPs
32
Compute Units
24

Theoretical Performance

Pixel Rate
26.56 GPixel/s
Texture Rate
79.68 GTexel/s
FP32 (float) performance
2,550 GFLOPS
FP64 (double) performance
637.4 GFLOPS (1:4)

Board Design

Slot Width
Dual-slot
Length
11.61 inches
295 mm
TDP
375 W
Outputs
1x DVI
4x mini-DisplayPort
Power Connectors
2x 8-pin
Board Number
C206

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 (11)

Name GPU Clock Memory Clock Other Changes
ASUS HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm
Club 3D HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm
Diamond HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm
GIGABYTE HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm
HIS HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm
MSI HD 6990 830 MHz 1250 MHz
PowerColor HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm
PowerColor HD 6990 LCS 880 MHz 1250 MHz 12 inches/305 mm, Single-slot
Sapphire HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm
VTX3D HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm
XFX HD 6990 830 MHz 1250 MHz 11.6 inches/295 mm