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ATI Radeon HD 3850 X3

Graphics Processor
RV670 x3
Cores
320 x3
TMUs
16 x3
ROPs
16 x3
Memory Size
512 MB x3
Memory Type
GDDR3
Bus Width
256 bit x3
The Radeon HD 3850 X3 was a graphics card by ATI, that was never released. Built on the 55 nm process, and based on the RV670 graphics processor, in its RV670 PRO variant, the card supports DirectX 10.1. Since Radeon HD 3850 X3 does not support DirectX 11 or DirectX 12, it might not be able to run all the latest games. The RV670 graphics processor is an average sized chip with a die area of 192 mm² and 666 million transistors. Radeon HD 3850 X3 combines three graphics processors to increase performance. It features 320 shading units, 16 texture mapping units, and 16 ROPs, per GPU. ATI has paired 1,536 MB GDDR3 memory with the Radeon HD 3850 X3, which are connected using a 256-bit memory interface per GPU (each GPU manages 512 MB). The GPU is operating at a frequency of 669 MHz, memory is running at 850 MHz.
Being a dual-slot card, the ATI Radeon HD 3850 X3 draws power from 1x 8-pin power connector, with power draw rated at 145 W maximum. Display outputs include: 4x DVI. Radeon HD 3850 X3 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 292 mm in length, and features a dual-slot cooling solution.

Graphics Processor

GPU Name
RV670
GPU Variant
RV670 PRO
(215-0708003)
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
666 million
Die Size
192 mm²

Graphics Card

Release Date
Never Released
Generation
Radeon R600
(HD 3800)
Predecessor
Radeon R500 PCIe
Successor
Radeon R700
Production
End-of-life
Bus Interface
PCIe 2.0 x16

Relative Performance

30%
GeForce 210
38%
GeForce 9400 GT
47%
Radeon HD 4550
60%
Radeon HD 5450
71%
Radeon HD 6450
75%
GeForce GT 520
92%
GeForce GT 220
100%
Radeon HD 3850 X3
121%
GeForce GT 430
122%
Radeon HD 5570
133%
Radeon HD 4670
140%
GeForce GT 440
143%
GeForce GT 240
164%
GeForce 9600 GT
174%
Radeon HD 5670
187%
GeForce GT 640
193%
GeForce 9800 GT
201%
Radeon HD 6670
207%
Radeon HD 4830
222%
Radeon HD 4770
234%
Radeon HD 4850
239%
GeForce GTS 250
246%
GeForce GTS 450
254%
Radeon HD 5750
291%
Radeon HD 7750
293%
Radeon HD 5770
298%
GeForce GTX 260
302%
Radeon HD 4870
302%
Radeon Vega 8
306%
GeForce GTX 550 Ti
308%
GeForce GTX 650
326%
Radeon HD 5830
343%
Radeon HD 6790
349%
Radeon HD 4890
362%
GeForce GTX 460
364%
Radeon RX Vega 11
368%
GeForce GT 1030
371%
GeForce GTX 275
372%
Radeon HD 7770 GHz Edition
373%
GeForce GTX 280
380%
GeForce GTX 465
399%
Radeon HD 6850
406%
GeForce GTX 285
436%
Radeon HD 5850
444%
GeForce GTX 650 Ti
444%
Radeon HD 7790
463%
Radeon RX 550
464%
GeForce GTX 470
481%
Radeon HD 6870
513%
Radeon HD 5870
529%
GeForce GTX 560 Ti
532%
Radeon HD 4870 X2
541%
GeForce GTX 750 Ti
544%
Radeon HD 6950
563%
GeForce GTX 295
570%
GeForce GTX 650 Ti Boost
574%
Radeon HD 7850
584%
GeForce GTX 480
611%
Radeon HD 6970
623%
Radeon R7 265
633%
Radeon RX 460
633%
Radeon R7 370
635%
GeForce GTX 660
637%
GeForce GTX 570
648%
Radeon RX 560
688%
GeForce GTX 950
694%
Radeon HD 7870 GHz Edition
711%
Radeon R9 270X
720%
GeForce GTX 660 Ti
723%
GeForce GTX 580
729%
GeForce GTX 1050
730%
Radeon HD 7950
745%
Radeon HD 5970
766%
GeForce GTX 760
824%
GeForce GTX 670
845%
GeForce GTX 960
867%
Radeon R9 380
872%
Radeon R9 285
881%
Radeon HD 7970
890%
GeForce GTX 680
911%
GeForce GTX 1050 Ti
935%
GeForce GTX 770
956%
Radeon HD 6990
979%
Radeon R9 280X
993%
GeForce GTX 590
994%
Radeon HD 7970 GHz Edition
1101%
GeForce GTX 780
1140%
GeForce GTX 1650
1211%
Radeon RX 470
1228%
Radeon R9 290
1294%
Radeon RX 570
1310%
Radeon R9 390
1317%
Radeon R9 290X
1335%
GeForce GTX 970
1353%
GeForce GTX TITAN
1371%
GeForce GTX 780 Ti
1390%
Radeon R9 390X
1396%
Radeon HD 7990
1403%
Radeon RX 480
1415%
GeForce GTX 690
1453%
GeForce GTX 1060 6 GB
1473%
Radeon RX 5500 OEM
1491%
Radeon RX 580
1502%
Radeon RX 5500 XT
1522%
GeForce GTX 980
1535%
GeForce GTX 1650 SUPER
1541%
Radeon R9 FURY
1610%
Radeon RX 590
1696%
Radeon R9 295X2
1705%
GeForce GTX 1660
1725%
Radeon R9 FURY X
1754%
GeForce GTX 980 Ti
1800%
GeForce GTX TITAN X
1915%
GeForce GTX 1660 SUPER
1957%
GeForce GTX 1660 Ti
1957%
GeForce GTX 1070
2084%
Radeon RX Vega 56
2210%
GeForce GTX 1070 Ti
2243%
Radeon RX 5600 XT
2273%
Radeon RX Vega 64
2305%
GeForce GTX 1080
2305%
GeForce RTX 2060
2399%
Radeon RX 5700
2589%
GeForce RTX 2060 SUPER
2684%
GeForce RTX 2070
2747%
Radeon RX 5700 XT
2778%
Radeon VII
2850%
TITAN X Pascal
2936%
GeForce GTX 1080 Ti
2968%
GeForce RTX 2070 SUPER
3157%
GeForce RTX 2080
3347%
GeForce RTX 2080 SUPER
3397%
GeForce RTX 3060 Ti
3694%
GeForce RTX 2080 Ti
3731%
GeForce RTX 3070
4026%
Radeon RX 6800
4617%
Radeon RX 6800 XT
4876%
GeForce RTX 3080
4973%
Radeon RX 6900 XT
5366%
GeForce RTX 3090
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
669 MHz
Memory Clock
850 MHz
1700 Mbps effective

Memory

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

Render Config

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

Theoretical Performance

Pixel Rate
10.70 GPixel/s
Texture Rate
10.70 GTexel/s
FP32 (float) performance
428.2 GFLOPS

Board Design

Slot Width
Dual-slot
Length
292 mm
11.5 inches
TDP
145 W
Suggested PSU
300 W
Outputs
4x DVI
Power Connectors
1x 8-pin

Graphics Features

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

Card Notes

Unreleased ASUS prototype consisting of three liquid-cooled 3850 MXM modules

RV670 GPU Notes

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

RV670 Chip Numbers:
RV670 XT (215-0708017)
RV670 XTX ES (215-0708001)

Retail boards based on this design (1)

Name GPU Clock Memory Clock Other Changes
ASUS HD 3850 Trinity 669 MHz 850 MHz