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AMD Radeon HD 6870 X2

Graphics Processor
Barts x2
Cores
1120 x2
TMUs
56 x2
ROPs
32 x2
Memory Size
1024 MB x2
Memory Type
GDDR5
Bus Width
256 bit x2
The Radeon HD 6870 X2 was a high-end graphics card by AMD, launched on July 8th, 2011. 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. Radeon HD 6870 X2 combines two graphics processors to increase performance. It features 1120 shading units, 56 texture mapping units, and 32 ROPs, per GPU. AMD has paired 2,048 MB GDDR5 memory with the Radeon HD 6870 X2, which are connected using a 256-bit memory interface per GPU (each GPU manages 1,024 MB). The GPU is operating at a frequency of 900 MHz, memory is running at 1050 MHz (4.2 Gbps effective).
Being a dual-slot card, its power draw is rated at 300 W maximum. Display outputs include: 2x DVI, 1x HDMI 1.3a, 2x mini-DisplayPort 1.1. Radeon HD 6870 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 304 mm in length, and features a dual-slot cooling solution. Its price at launch was 520 US Dollars.

Graphics Processor

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

Graphics Card

Release Date
Jul 8th, 2011
Generation
Northern Islands
(HD 6800)
Predecessor
Evergreen
Successor
Southern Islands
Production
End-of-life
Launch Price
520 USD
Bus Interface
PCIe 2.0 x16
Reviews
170 in our database

Relative Performance

8%
GeForce 210
10%
GeForce 9400 GT
12%
Radeon HD 4550
16%
Radeon HD 5450
19%
Radeon HD 6450
20%
GeForce GT 520
24%
GeForce GT 220
32%
GeForce GT 430
32%
Radeon HD 5570
35%
Radeon HD 4670
37%
GeForce GT 440
38%
GeForce GT 240
43%
GeForce 9600 GT
46%
Radeon HD 5670
49%
GeForce GT 640
51%
GeForce 9800 GT
53%
Radeon HD 6670
55%
Radeon HD 4830
58%
Radeon HD 4770
61%
Radeon HD 4850
63%
GeForce GTS 250
65%
GeForce GTS 450
67%
Radeon HD 5750
76%
Radeon HD 7750
77%
Radeon HD 5770
78%
GeForce GTX 260
79%
Radeon HD 4870
80%
Radeon Vega 8
80%
GeForce GTX 550 Ti
81%
GeForce GTX 650
86%
Radeon HD 5830
90%
Radeon HD 6790
92%
Radeon HD 4890
95%
GeForce GTX 460
96%
Radeon RX Vega 11
97%
GeForce GT 1030
98%
GeForce GTX 275
98%
Radeon HD 7770 GHz Edition
98%
GeForce GTX 280
100%
Radeon HD 6870 X2
100%
GeForce GTX 465
105%
Radeon HD 6850
107%
GeForce GTX 285
115%
Radeon HD 5850
117%
GeForce GTX 650 Ti
117%
Radeon HD 7790
122%
Radeon RX 550
122%
GeForce GTX 470
126%
Radeon HD 6870
135%
Radeon HD 5870
139%
GeForce GTX 560 Ti
140%
Radeon HD 4870 X2
142%
GeForce GTX 750 Ti
143%
Radeon HD 6950
148%
GeForce GTX 295
150%
GeForce GTX 650 Ti Boost
151%
Radeon HD 7850
154%
GeForce GTX 480
161%
Radeon HD 6970
164%
Radeon R7 265
166%
Radeon RX 460
167%
Radeon R7 370
167%
GeForce GTX 660
168%
GeForce GTX 570
170%
Radeon RX 560
181%
GeForce GTX 950
183%
Radeon HD 7870 GHz Edition
187%
Radeon R9 270X
189%
GeForce GTX 660 Ti
190%
GeForce GTX 580
192%
GeForce GTX 1050
192%
Radeon HD 7950
196%
Radeon HD 5970
201%
GeForce GTX 760
217%
GeForce GTX 670
222%
GeForce GTX 960
228%
Radeon R9 380
229%
Radeon R9 285
232%
Radeon HD 7970
234%
GeForce GTX 680
240%
GeForce GTX 1050 Ti
246%
GeForce GTX 770
252%
Radeon HD 6990
258%
Radeon R9 280X
261%
GeForce GTX 590
261%
Radeon HD 7970 GHz Edition
290%
GeForce GTX 780
294%
Radeon RX 6400
300%
GeForce GTX 1650
319%
Radeon RX 470
323%
Radeon R9 290
341%
Radeon RX 570
345%
Radeon R9 390
347%
Radeon R9 290X
351%
GeForce GTX 970
356%
GeForce GTX TITAN
361%
GeForce GTX 780 Ti
366%
Radeon R9 390X
367%
Radeon HD 7990
369%
Radeon RX 480
372%
GeForce GTX 690
382%
GeForce GTX 1060 6 GB
387%
Radeon RX 5500 OEM
392%
Radeon RX 580
395%
Radeon RX 5500 XT
399%
Radeon RX 6500 XT
400%
GeForce GTX 980
404%
GeForce GTX 1650 SUPER
405%
Radeon R9 FURY
424%
Radeon RX 590
446%
Radeon R9 295X2
449%
GeForce GTX 1660
454%
Radeon R9 FURY X
461%
GeForce GTX 980 Ti
473%
GeForce GTX TITAN X
504%
GeForce GTX 1660 SUPER
515%
GeForce GTX 1070
515%
GeForce GTX 1660 Ti
523%
GeForce RTX 3050 8 GB
548%
Radeon RX Vega 56
581%
GeForce GTX 1070 Ti
590%
Radeon RX 5600 XT
598%
Radeon RX Vega 64
606%
GeForce RTX 2060
606%
GeForce GTX 1080
631%
Radeon RX 5700
675%
Radeon RX 6600
681%
GeForce RTX 2060 SUPER
706%
GeForce RTX 2070
720%
GeForce RTX 3060
723%
Radeon RX 5700 XT
731%
Radeon VII
750%
TITAN X Pascal
772%
GeForce GTX 1080 Ti
781%
GeForce RTX 2070 SUPER
806%
Radeon RX 6600 XT
821%
Radeon RX 6650 XT
840%
GeForce RTX 2080
880%
GeForce RTX 2080 SUPER
902%
GeForce RTX 3060 Ti
918%
Radeon RX 6700 XT
988%
GeForce RTX 2080 Ti
991%
Radeon RX 6750 XT
1056%
GeForce RTX 3070
1130%
GeForce RTX 3070 Ti
1164%
Radeon RX 6800
1336%
Radeon RX 6800 XT
1373%
GeForce RTX 3080
1452%
Radeon RX 6900 XT
1538%
GeForce RTX 3080 Ti
1539%
Radeon RX 6950 XT
1553%
GeForce RTX 3090
1677%
GeForce RTX 3090 Ti
Based on TPU review data: "Performance Summary" at 1920x1080, 4K for 2080 Ti and faster.
Performance estimated based on architecture, shader count and clocks.

Clock Speeds

GPU Clock
900 MHz
Memory Clock
1050 MHz
4.2 Gbps 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
L1 Cache
8 KB (per CU)
L2 Cache
512 KB

Theoretical Performance

Pixel Rate
28.80 GPixel/s
Texture Rate
50.40 GTexel/s
FP32 (float) performance
2.016 TFLOPS

Board Design

Slot Width
Dual-slot
Length
304 mm
12 inches
TDP
300 W
Suggested PSU
700 W
Outputs
2x DVI
1x HDMI 1.3a
2x mini-DisplayPort 1.1

Graphics Features

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

Barts GPU Notes

Architecture Codename: Northern Islands
Codename: Victoria
Graphics/Compute: GFX4
Display Core Engine: 5.0
Unified Video Decoder: 3.1

Retail boards based on this design (3)

Name GPU Clock Memory Clock Other Changes
Club 3D HD 6870 X2 900 MHz 1050 MHz
PowerColor HD 6870 X2 900 MHz 1050 MHz
VTX3D HD 6870 X2 900 MHz 1050 MHz
May 28th, 2022 10:58 EDT change timezone

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