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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. 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 placed 1,536 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 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 connectors, 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)
Production
End-of-life
Bus Interface
PCIe 2.0 x16

Relative Performance

28%
GeForce 210
35%
GeForce 9400 GT
44%
Radeon HD 4550
56%
Radeon HD 5450
66%
Radeon HD 6450
69%
GeForce GT 520
86%
GeForce GT 220
100%
Radeon HD 3850 X3
112%
GeForce GT 430
113%
Radeon HD 5570
123%
Radeon HD 4670
130%
GeForce GT 440
133%
GeForce GT 240
152%
GeForce 9600 GT
162%
Radeon HD 5670
174%
GeForce GT 640
179%
GeForce 9800 GT
187%
Radeon HD 6670
193%
Radeon HD 4830
206%
Radeon HD 4770
217%
Radeon HD 4850
222%
GeForce GTS 250
228%
GeForce GTS 450
236%
Radeon HD 5750
270%
Radeon HD 7750
272%
Radeon HD 5770
277%
GeForce GTX 260
280%
Radeon HD 4870
281%
Radeon Vega 8
284%
GeForce GTX 550 Ti
286%
GeForce GTX 650
303%
Radeon HD 5830
319%
Radeon HD 6790
324%
Radeon HD 4890
336%
GeForce GTX 460
338%
Radeon RX Vega 11
342%
GeForce GT 1030
345%
GeForce GTX 275
346%
Radeon HD 7770 GHz Edition
347%
GeForce GTX 280
353%
GeForce GTX 465
370%
Radeon HD 6850
377%
GeForce GTX 285
405%
Radeon HD 5850
412%
GeForce GTX 650 Ti
412%
Radeon HD 7790
430%
Radeon RX 550
431%
GeForce GTX 470
446%
Radeon HD 6870
476%
Radeon HD 5870
491%
GeForce GTX 560 Ti
494%
Radeon HD 4870 X2
503%
GeForce GTX 750 Ti
505%
Radeon HD 6950
523%
GeForce GTX 295
529%
GeForce GTX 650 Ti Boost
533%
Radeon HD 7850
542%
GeForce GTX 480
568%
Radeon HD 6970
579%
Radeon R7 265
588%
Radeon RX 460
588%
Radeon R7 370
590%
GeForce GTX 660
592%
GeForce GTX 570
602%
Radeon RX 560
639%
GeForce GTX 950
645%
Radeon HD 7870 GHz Edition
660%
Radeon R9 270X
668%
GeForce GTX 660 Ti
671%
GeForce GTX 580
677%
GeForce GTX 1050
678%
Radeon HD 7950
692%
Radeon HD 5970
711%
GeForce GTX 760
765%
GeForce GTX 670
785%
GeForce GTX 960
805%
Radeon R9 380
810%
Radeon R9 285
818%
Radeon HD 7970
827%
GeForce GTX 680
846%
GeForce GTX 1050 Ti
868%
GeForce GTX 770
888%
Radeon HD 6990
909%
Radeon R9 280X
922%
GeForce GTX 590
923%
Radeon HD 7970 GHz Edition
1022%
GeForce GTX 780
1059%
GeForce GTX 1650
1125%
Radeon RX 470
1140%
Radeon R9 290
1202%
Radeon RX 570
1217%
Radeon R9 390
1223%
Radeon R9 290X
1240%
GeForce GTX 970
1256%
GeForce GTX TITAN
1273%
GeForce GTX 780 Ti
1291%
Radeon R9 390X
1297%
Radeon HD 7990
1303%
Radeon RX 480
1314%
GeForce GTX 690
1349%
GeForce GTX 1060 6 GB
1368%
Radeon RX 5500 OEM
1385%
Radeon RX 580
1395%
Radeon RX 5500 XT
1413%
GeForce GTX 980
1426%
GeForce GTX 1650 SUPER
1432%
Radeon R9 FURY
1495%
Radeon RX 590
1575%
Radeon R9 295X2
1583%
GeForce GTX 1660
1602%
Radeon R9 FURY X
1629%
GeForce GTX 980 Ti
1671%
GeForce GTX TITAN X
1778%
GeForce GTX 1660 SUPER
1818%
GeForce GTX 1660 Ti
1818%
GeForce GTX 1070
1935%
Radeon RX Vega 56
2052%
GeForce GTX 1070 Ti
2111%
Radeon RX Vega 64
2140%
GeForce GTX 1080
2140%
GeForce RTX 2060
2228%
Radeon RX 5700
2404%
GeForce RTX 2060 SUPER
2492%
GeForce RTX 2070
2551%
Radeon RX 5700 XT
2580%
Radeon VII
2647%
TITAN X Pascal
2727%
GeForce GTX 1080 Ti
2756%
GeForce RTX 2070 SUPER
2932%
GeForce RTX 2080
3108%
GeForce RTX 2080 SUPER
3431%
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
669 MHz
Memory Clock
850 MHz
1700 MHz 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
11.5 inches
292 mm
TDP
145 W
Suggested PSU
350 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