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AMD Radeon HD 6850 X2

Graphics Processor
Barts x2
Cores
960 x2
TMUs
48 x2
ROPs
32 x2
Memory Size
2 GB x2
Memory Type
GDDR5
Bus Width
256 bit x2
The Radeon HD 6850 X2 was a graphics card by AMD, launched on September 19th, 2011. Built on the 40 nm process, and based on the Barts graphics processor, in its Barts PRO 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 6850 X2 to reach the product's target shader count. Radeon HD 6850 X2 combines two graphics processors to increase performance. It features 960 shading units, 48 texture mapping units, and 32 ROPs, per GPU. AMD has paired 4 GB GDDR5 memory with the Radeon HD 6850 X2, 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 800 MHz, memory is running at 1050 MHz (4.2 Gbps effective).
Being a dual-slot card, the AMD Radeon HD 6850 X2 draws power from 2x 8-pin power connectors, with power draw rated at 254 W maximum. Display outputs include: 2x DVI, 1x HDMI 1.3a, 1x DisplayPort 1.1. Radeon HD 6850 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface.

Graphics Processor

GPU Name
Barts
GPU Variant
Barts PRO
(215-0798006)
Architecture
TeraScale 2
Foundry
TSMC
Process Size
40 nm
Transistors
1,700 million
Die Size
255 mm²

Graphics Card

Release Date
Sep 19th, 2011
Generation
Northern Islands
(HD 6800)
Predecessor
Evergreen
Successor
Southern Islands
Production
End-of-life
Bus Interface
PCIe 2.0 x16
Reviews
105 in our database

Relative Performance

10%
GeForce 210
13%
GeForce 9400 GT
16%
Radeon HD 4550
21%
Radeon HD 5450
24%
Radeon HD 6450
26%
GeForce GT 520
32%
GeForce GT 220
42%
GeForce GT 430
42%
Radeon HD 5570
46%
Radeon HD 4670
48%
GeForce GT 440
49%
GeForce GT 240
57%
GeForce 9600 GT
60%
Radeon HD 5670
65%
GeForce GT 640
67%
GeForce 9800 GT
69%
Radeon HD 6670
72%
Radeon HD 4830
76%
Radeon HD 4770
81%
Radeon HD 4850
82%
GeForce GTS 250
85%
GeForce GTS 450
88%
Radeon HD 5750
100%
Radeon HD 6850 X2
100%
Radeon HD 7750
101%
Radeon HD 5770
103%
GeForce GTX 260
104%
Radeon HD 4870
104%
Radeon Vega 8
106%
GeForce GTX 550 Ti
106%
GeForce GTX 650
113%
Radeon HD 5830
118%
Radeon HD 6790
120%
Radeon HD 4890
125%
GeForce GTX 460
126%
Radeon RX Vega 11
127%
GeForce GT 1030
128%
GeForce GTX 275
129%
Radeon HD 7770 GHz Edition
129%
GeForce GTX 280
131%
GeForce GTX 465
138%
Radeon HD 6850
140%
GeForce GTX 285
151%
Radeon HD 5850
153%
GeForce GTX 650 Ti
153%
Radeon HD 7790
160%
Radeon RX 550
160%
GeForce GTX 470
166%
Radeon HD 6870
177%
Radeon HD 5870
183%
GeForce GTX 560 Ti
184%
Radeon HD 4870 X2
187%
GeForce GTX 750 Ti
188%
Radeon HD 6950
194%
GeForce GTX 295
197%
GeForce GTX 650 Ti Boost
198%
Radeon HD 7850
202%
GeForce GTX 480
211%
Radeon HD 6970
215%
Radeon R7 265
219%
Radeon RX 460
219%
Radeon R7 370
219%
GeForce GTX 660
220%
GeForce GTX 570
224%
Radeon RX 560
238%
GeForce GTX 950
240%
Radeon HD 7870 GHz Edition
245%
Radeon R9 270X
248%
GeForce GTX 660 Ti
250%
GeForce GTX 580
252%
GeForce GTX 1050
252%
Radeon HD 7950
257%
Radeon HD 5970
264%
GeForce GTX 760
284%
GeForce GTX 670
292%
GeForce GTX 960
299%
Radeon R9 380
301%
Radeon R9 285
304%
Radeon HD 7970
307%
GeForce GTX 680
314%
GeForce GTX 1050 Ti
323%
GeForce GTX 770
330%
Radeon HD 6990
338%
Radeon R9 280X
343%
GeForce GTX 590
343%
Radeon HD 7970 GHz Edition
380%
GeForce GTX 780
386%
Radeon RX 6400
394%
GeForce GTX 1650
418%
Radeon RX 470
424%
Radeon R9 290
447%
Radeon RX 570
452%
Radeon R9 390
455%
Radeon R9 290X
461%
GeForce GTX 970
467%
GeForce GTX TITAN
473%
GeForce GTX 780 Ti
480%
Radeon R9 390X
482%
Radeon HD 7990
484%
Radeon RX 480
489%
GeForce GTX 690
502%
GeForce GTX 1060 6 GB
509%
Radeon RX 5500 OEM
515%
Radeon RX 580
519%
Radeon RX 5500 XT
523%
Radeon RX 6500 XT
525%
GeForce GTX 980
530%
GeForce GTX 1650 SUPER
532%
Radeon R9 FURY
556%
Radeon RX 590
585%
Radeon R9 295X2
589%
GeForce GTX 1660
596%
Radeon R9 FURY X
606%
GeForce GTX 980 Ti
621%
GeForce GTX TITAN X
661%
GeForce GTX 1660 SUPER
676%
GeForce GTX 1070
676%
GeForce GTX 1660 Ti
687%
GeForce RTX 3050 8 GB
719%
Radeon RX Vega 56
763%
GeForce GTX 1070 Ti
774%
Radeon RX 5600 XT
785%
Radeon RX Vega 64
796%
GeForce RTX 2060
796%
GeForce GTX 1080
828%
Radeon RX 5700
886%
Radeon RX 6600
894%
GeForce RTX 2060 SUPER
927%
GeForce RTX 2070
945%
GeForce RTX 3060
948%
Radeon RX 5700 XT
959%
Radeon VII
984%
TITAN X Pascal
1014%
GeForce GTX 1080 Ti
1025%
GeForce RTX 2070 SUPER
1057%
Radeon RX 6600 XT
1078%
Radeon RX 6650 XT
1102%
GeForce RTX 2080
1156%
GeForce RTX 2080 SUPER
1184%
GeForce RTX 3060 Ti
1204%
Radeon RX 6700 XT
1297%
GeForce RTX 2080 Ti
1301%
Radeon RX 6750 XT
1386%
GeForce RTX 3070
1483%
GeForce RTX 3070 Ti
1528%
Radeon RX 6800
1754%
Radeon RX 6800 XT
1802%
GeForce RTX 3080
1906%
Radeon RX 6900 XT
2018%
GeForce RTX 3080 Ti
2021%
Radeon RX 6950 XT
2038%
GeForce RTX 3090
2201%
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
800 MHz
Memory Clock
1050 MHz
4.2 Gbps effective

Memory

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

Render Config

Shading Units
960
TMUs
48
ROPs
32
Compute Units
12
L1 Cache
8 KB (per CU)
L2 Cache
512 KB

Theoretical Performance

Pixel Rate
25.60 GPixel/s
Texture Rate
38.40 GTexel/s
FP32 (float) performance
1.536 TFLOPS

Board Design

Slot Width
Dual-slot
TDP
254 W
Suggested PSU
600 W
Outputs
2x DVI
1x HDMI 1.3a
1x DisplayPort 1.1
Power Connectors
2x 8-pin

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 (1)

Name GPU Clock Memory Clock Other Changes
ColorFire HD 6850 X2 XStorm 800 MHz 1050 MHz
May 28th, 2022 10:49 EDT change timezone

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