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ATI Radeon HD 3870 X2

Graphics Processor
R680 x2
Cores
320 x2
TMUs
16 x2
ROPs
16 x2
Memory Size
512 MB x2
Memory Type
GDDR3
Bus Width
256 bit x2
The Radeon HD 3870 X2 was a high-end graphics card by ATI, launched in January 2008. Built on the 55 nm process, and based on the R680 graphics processor, in its R680 XT variant, the card supports DirectX 10.1. The R680 graphics processor is an average sized chip with a die area of 192 mm² and 666 million transistors. Radeon HD 3870 X2 combines two graphics processors to increase performance. It features 320 shading units, 16 texture mapping units and 16 ROPs per GPU. ATI has placed 1,024 MB GDDR3 memory on the card, which are connected using a 256-bit memory interface per GPU (each GPU manages 512 MB). The GPU is operating at a frequency of 825 MHz, memory is running at 901 MHz.
Being a dual-slot card, the ATI Radeon HD 3870 X2 draws power from 1x 6-pin + 1x 8-pin power connectors, with power draw rated at 165 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 3870 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 267 mm in length, and features a dual-slot cooling solution. Its price at launch was 449 US Dollars.

Graphics Processor

GPU Name
R680
GPU Variant
R680 XT
(215-0708017)
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
666 million
Die Size
192 mm²

Graphics Card

Release Date
Jan 26th, 2008
Generation
Radeon R600
(HD 3800)
Production
End-of-life
Launch Price
449 USD
Bus Interface
PCIe 2.0 x16
Reviews
72 in our database

Relative Performance

20%
GeForce 210
26%
GeForce 9400 GT
32%
Radeon HD 4550
40%
Radeon HD 5450
48%
Radeon HD 6450
50%
GeForce GT 520
62%
GeForce GT 220
81%
GeForce GT 430
82%
Radeon HD 5570
89%
Radeon HD 4670
94%
GeForce GT 440
96%
GeForce GT 240
100%
Radeon HD 3870 X2
110%
GeForce 9600 GT
117%
Radeon HD 5670
126%
GeForce GT 640
130%
GeForce 9800 GT
135%
Radeon HD 6670
139%
Radeon HD 4830
149%
Radeon HD 4770
157%
Radeon HD 4850
160%
GeForce GTS 250
165%
GeForce GTS 450
171%
Radeon HD 5750
195%
Radeon HD 7750
197%
Radeon HD 5770
200%
GeForce GTX 260
203%
Radeon HD 4870
203%
Radeon Vega 8
205%
GeForce GTX 550 Ti
207%
GeForce GTX 650
219%
Radeon HD 5830
230%
Radeon HD 6790
234%
Radeon HD 4890
243%
GeForce GTX 460
245%
Radeon RX Vega 11
247%
GeForce GT 1030
249%
GeForce GTX 275
250%
Radeon HD 7770 GHz Edition
251%
GeForce GTX 280
256%
GeForce GTX 465
268%
Radeon HD 6850
273%
GeForce GTX 285
293%
Radeon HD 5850
298%
GeForce GTX 650 Ti
298%
Radeon HD 7790
311%
Radeon RX 550
312%
GeForce GTX 470
323%
Radeon HD 6870
345%
Radeon HD 5870
355%
GeForce GTX 560 Ti
357%
Radeon HD 4870 X2
364%
GeForce GTX 750 Ti
366%
Radeon HD 6950
378%
GeForce GTX 295
383%
GeForce GTX 650 Ti Boost
386%
Radeon HD 7850
392%
GeForce GTX 480
411%
Radeon HD 6970
419%
Radeon R7 265
425%
Radeon RX 460
425%
Radeon R7 370
427%
GeForce GTX 660
428%
GeForce GTX 570
435%
Radeon RX 560
462%
GeForce GTX 950
466%
Radeon HD 7870 GHz Edition
478%
Radeon R9 270X
483%
GeForce GTX 660 Ti
486%
GeForce GTX 580
490%
GeForce GTX 1050
491%
Radeon HD 7950
500%
Radeon HD 5970
514%
GeForce GTX 760
554%
GeForce GTX 670
568%
GeForce GTX 960
583%
Radeon R9 380
586%
Radeon R9 285
592%
Radeon HD 7970
598%
GeForce GTX 680
612%
GeForce GTX 1050 Ti
628%
GeForce GTX 770
643%
Radeon HD 6990
658%
Radeon R9 280X
667%
GeForce GTX 590
668%
Radeon HD 7970 GHz Edition
740%
GeForce GTX 780
766%
GeForce GTX 1650
814%
Radeon RX 470
825%
Radeon R9 290
870%
Radeon RX 570
880%
Radeon R9 390
885%
Radeon R9 290X
897%
GeForce GTX 970
909%
GeForce GTX TITAN
921%
GeForce GTX 780 Ti
934%
Radeon R9 390X
938%
Radeon HD 7990
943%
Radeon RX 480
951%
GeForce GTX 690
1002%
Radeon RX 580
1022%
GeForce GTX 980
1036%
Radeon R9 FURY
1036%
GeForce GTX 1060 6 GB
1082%
Radeon RX 590
1139%
Radeon R9 295X2
1145%
GeForce GTX 1660
1159%
Radeon R9 FURY X
1178%
GeForce GTX 980 Ti
1209%
GeForce GTX TITAN X
1315%
GeForce GTX 1660 Ti
1315%
GeForce GTX 1070
1400%
Radeon RX Vega 56
1485%
GeForce GTX 1070 Ti
1527%
Radeon RX Vega 64
1548%
GeForce GTX 1080
1548%
GeForce RTX 2060
1612%
Radeon RX 5700
1739%
GeForce RTX 2060 SUPER
1803%
GeForce RTX 2070
1845%
Radeon RX 5700 XT
1867%
Radeon VII
1915%
TITAN X Pascal
1973%
GeForce GTX 1080 Ti
1994%
GeForce RTX 2070 SUPER
2121%
GeForce RTX 2080
2248%
GeForce RTX 2080 SUPER
2482%
GeForce RTX 2080 Ti
Based on TPU review data: "Performance Summary" at 1920x1080
Performance estimated based on architecture, shader count and clocks.

Clock Speeds

GPU Clock
825 MHz
Memory Clock
901 MHz
1802 MHz effective

Memory

Memory Size
512 MB
Memory Type
GDDR3
Memory Bus
256 bit
Bandwidth
57.66 GB/s

Render Config

Shading Units
320
TMUs
16
ROPs
16
Compute Units
4
L2 Cache
256 KB

Theoretical Performance

Pixel Rate
13.20 GPixel/s
Texture Rate
13.20 GTexel/s
FP32 (float) performance
528.0 GFLOPS
FP64 (double) performance
105.6 GFLOPS (1:5)

Board Design

Slot Width
Dual-slot
Length
10.5 inches
267 mm
TDP
165 W
Suggested PSU
450 W
Outputs
2x DVI
1x S-Video
Power Connectors
1x 6-pin + 1x 8-pin
Board Number
B400

Graphics Features

DirectX
10.1 (10_1)
OpenGL
3.3
OpenCL
N/A
Vulkan
N/A
Shader Model
4.1

R680 GPU Notes

Graphics/Compute: GFX3
Display Core Engine: 2.0
Unified Video Decoder: 1.0

Retail boards based on this design (3)

Name GPU Clock Memory Clock Other Changes
ASUS ROG HD 3870 X2 TOP 851 MHz 954 MHz 4x DVI 1x S-Video
PowerColor HD 3870 X2 GDDR4 825 MHz 1125 MHz GDDR4, 3x DVI 1x HDMI 1x S-Video
Sapphire HD 3870 X2 ATOMIC 860 MHz 931 MHz 10.63 inches/270 mm, Single-slot