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AMD Radeon HD 6870

Barts
Graphics Processor
1120
Cores
56
TMUs
32
ROPs
1024 MB
Memory Size
GDDR5
Memory Type
256 bit
Bus Width
AMD Radeon HD 6870 Photo AMD Barts Photo
The Radeon HD 6870 was a performance graphics card by AMD, launched in October 2010. Built on the 40 nm process, and based on the Barts graphics processor, in its Barts XT 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. It features 1120 shading units, 56 texture mapping units and 32 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 900 MHz, memory is running at 1050 MHz.
Being a dual-slot card, the AMD Radeon HD 6870 draws power from 2x 6-pin power connectors, with power draw rated at 151 W maximum. Display outputs include: 2x DVI, 1x HDMI, 2x mini-DisplayPort. Radeon HD 6870 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 220 mm in length, and features a dual-slot cooling solution. Its price at launch was 239 US Dollars.

Graphics Processor

GPU Name
Barts
GPU Variant
Barts XT
(215-0798000)
Architecture
TeraScale 2
Process Size
40 nm
Transistors
1,700 million
Die Size
255 mm²

Graphics Card

Release Date
Oct 21st, 2010
Generation
Northern Islands HD 6800
Production Status
End-of-life
Launch Price
239 USD
Bus Interface
PCIe 2.0 x16

Relative Performance

6%
8%
10%
13%
15%
16%
19%
25%
25%
28%
29%
30%
34%
36%
39%
40%
42%
43%
46%
49%
50%
51%
53%
60%
61%
62%
63%
63%
64%
64%
68%
71%
73%
75%
76%
77%
77%
78%
78%
79%
83%
85%
91%
92%
92%
96%
97%
100%
Radeon HD 6870
107%
110%
111%
113%
113%
117%
119%
119%
121%
127%
130%
132%
132%
132%
133%
143%
144%
148%
150%
150%
152%
152%
155%
155%
159%
171%
176%
180%
181%
183%
185%
189%
194%
199%
204%
207%
207%
229%
252%
255%
273%
274%
278%
281%
284%
285%
289%
291%
292%
294%
310%
317%
321%
321%
353%
359%
365%
392%
431%
446%
480%
480%
507%
593%
608%
663%
754%
Based on TPU review data: "Performance Summary" at 1920x1080

Clock Speeds

GPU Clock
900 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
1120
TMUs
56
ROPs
32
Compute Units
14

Theoretical Performance

Pixel Rate
28.80 GPixel/s
Texture Rate
50.40 GTexel/s
FP32 (float) performance
2,016 GFLOPS

Board Design

Slot Width
Dual-slot
Length
8.66 inches
220 mm
TDP
151 W
Outputs
2x DVI
1x HDMI
2x mini-DisplayPort
Power Connectors
2x 6-pin
Board Number
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 (17)

Name GPU Clock Memory Clock Other Changes
ASUS HD 6870 DirectCU 915 MHz 1050 MHz 11 inches/279 mm, 2x DVI 2x DisplayPort
GIGABYTE HD 6870 OC 915 MHz 1050 MHz 11.42 inches/290 mm
GIGABYTE HD 6870 SOC 950 MHz 1100 MHz 11.42 inches/290 mm
HIS HD 6870 Fan Turbo 920 MHz 1120 MHz 10.315 inches/262 mm
HIS HD 6870 IceQ X Turbo 920 MHz 1120 MHz 10.236 inches/260 mm
HIS HD 6870 IceQ X Turbo X 975 MHz 1150 MHz 10.236 inches/260 mm
MSI HD 6870 Hawk 930 MHz 1050 MHz 10.04 inches/255 mm
MSI HD 6870 OC 2 GB 920 MHz 1050 MHz 2048 MB, 9.646 inches/245 mm
MSI HD 6870 Twin Frozr II OC 920 MHz 1050 MHz 9.646 inches/245 mm
Sapphire HD 6870 Dirt3 Edition 920 MHz 1050 MHz 9.64 inches/245 mm
Sapphire HD 6870 FleX 900 MHz 1050 MHz 9.84 inches/250 mm
Sapphire HD 6870 Toxic 970 MHz 1150 MHz 9.37 inches/238 mm
Sapphire HD 6870 Vapor-X 900 MHz 1050 MHz 9.37 inches/238 mm
VTX3D HD 6870 V2 900 MHz 1050 MHz
XFX Double D HD 6870 2 GB 900 MHz 1050 MHz 2048 MB, 10.3 inches/262 mm
XFX Double D HD 6870 XXX Edition 925 MHz 1050 MHz 10.3 inches/262 mm
Yeston HD 6870 Game Master 940 MHz 1100 MHz 10.12 inches/257 mm, 1x DVI 1x HDMI 2x mini-DisplayPort