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AMD Radeon HD 6790

Barts
Graphics Processor
800
Cores
40
TMUs
16
ROPs
1024 MB
Memory Size
GDDR5
Memory Type
256 bit
Bus Width
AMD Radeon HD 6790 Photo AMD Barts Photo
The Radeon HD 6790 was a mid-range graphics card by AMD, launched in April 2011. Built on the 40 nm process, and based on the Barts graphics processor, in its Barts LE variant, the card supports DirectX 11.2. The Barts graphics processor is an average sized chip with a die area of 255 mm² and 1,700 million transistors. Unlike the fully unlocked Radeon HD 6870, which uses the same GPU but has all 1120 shaders enabled, AMD has disabled some shading units on the Radeon HD 6790 to reach the product's target shader count. It features 800 shading units, 40 texture mapping units and 16 ROPs. AMD has placed 1,024 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 840 MHz, memory is running at 1050 MHz.
Being a dual-slot card, the AMD Radeon HD 6790 draws power from 2x 6-pin power connectors, with power draw rated at 150 W maximum. Display outputs include: 2x DVI, 1x HDMI, 1x DisplayPort. Radeon HD 6790 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 198 mm in length, and features a dual-slot cooling solution. Its price at launch was 149 US Dollars.

Graphics Processor

GPU Name
Barts
GPU Variant
Barts LE
(215-0798002)
Architecture
TeraScale 2
Process Size
40 nm
Transistors
1,700 million
Die Size
255 mm²

Graphics Card

Release Date
Apr 4th, 2011
Generation
Northern Islands
(HD 6700)
Production
End-of-life
Launch Price
149 USD
Bus Interface
PCIe 2.0 x16

Relative Performance

9%
11%
14%
18%
21%
22%
27%
35%
36%
39%
41%
42%
48%
51%
55%
56%
59%
61%
65%
68%
70%
72%
74%
85%
85%
87%
88%
88%
89%
90%
95%
100%
Radeon HD 6790
102%
105%
106%
107%
108%
109%
109%
111%
116%
119%
127%
129%
129%
135%
135%
140%
150%
154%
155%
158%
159%
164%
166%
167%
170%
178%
182%
185%
185%
185%
186%
201%
202%
207%
210%
211%
212%
213%
217%
217%
223%
240%
247%
253%
254%
257%
260%
266%
273%
279%
285%
290%
290%
321%
353%
358%
382%
384%
389%
394%
398%
400%
405%
407%
409%
413%
435%
444%
449%
449%
494%
503%
511%
550%
604%
625%
673%
673%
710%
831%
852%
929%
1057%
Based on TPU review data: "Performance Summary" at 1920x1080

Clock Speeds

GPU Clock
840 MHz
Memory Clock
1050 MHz
4200 MHz effective

Memory

Memory Size
1024 MB
Memory Type
GDDR5
Memory Bus
256 bit
Bandwidth
134.4 GB/s

Render Config

Shading Units
800
TMUs
40
ROPs
16
Compute Units
10

Theoretical Performance

Pixel Rate
13.44 GPixel/s
Texture Rate
33.60 GTexel/s
FP32 (float) performance
1,344 GFLOPS

Board Design

Slot Width
Dual-slot
Length
7.8 inches
198 mm
TDP
150 W
Outputs
2x DVI
1x HDMI
1x DisplayPort
Power Connectors
2x 6-pin
Board Number
C220,
C222

Graphics Features

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

Barts GPU Notes

Graphics/Compute: GFX4
Display Core Engine: 5.0
Unified Video Decoder: 3.1

Retail boards based on this design (9)

Name GPU Clock Memory Clock Other Changes
HIS HD 6790 Fan 840 MHz 1050 MHz 9.055 inches/230 mm
HIS HD 6790 IceQ X 840 MHz 1050 MHz 9.25 inches/235 mm, 2x DVI 1x HDMI 2x mini-DisplayPort
HIS HD 6790 IceQ X Turbo 900 MHz 1100 MHz 9.25 inches/235 mm, 2x DVI 1x HDMI 2x mini-DisplayPort
MSI HD 6790 OC 920 MHz 1050 MHz 9.095 inches/231 mm
Sapphire HD 6790 840 MHz 1050 MHz 9.5 inches/241 mm
Sapphire HD 6790 840 MHz 1050 MHz 9.84 inches/250 mm, 1x DVI 1x HDMI 1x DisplayPort
XFX Double D HD 6790 840 MHz 1050 MHz 10.3 inches/262 mm, 2x DVI 1x HDMI 2x mini-DisplayPort
XFX HD 6790 840 MHz 1050 MHz 9.25 inches/235 mm, 2x DVI 1x HDMI 2x mini-DisplayPort
XFX HD 6790 840 MHz 1050 MHz 8.66 inches/220 mm, 2x DVI 1x HDMI 2x mini-DisplayPort