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ATI Radeon HD 3850

Graphics Processor
RV670
Cores
320
TMUs
16
ROPs
16
Memory Size
512 MB
Memory Type
GDDR3
Bus Width
256 bit
The Radeon HD 3850 was a mid-range graphics card by ATI, launched in November 2007. 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. It features 320 shading units, 16 texture mapping units and 16 ROPs. ATI has placed 512 MB GDDR3 memory on the card, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 668 MHz, memory is running at 830 MHz.
Being a single-slot card, the ATI Radeon HD 3850 draws power from 1x 6-pin power connectors, with power draw rated at 75 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 3850 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 208 mm in length, and features a single-slot cooling solution. Its price at launch was 179 US Dollars.

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
Nov 19th, 2007
Generation
Radeon R600
(HD 3800)
Production
End-of-life
Launch Price
179 USD
Bus Interface
PCIe 2.0 x16
Reviews
71 in our database

Relative Performance

25%
GeForce 210
32%
GeForce 9400 GT
40%
Radeon HD 4550
51%
Radeon HD 5450
60%
Radeon HD 6450
63%
GeForce GT 520
78%
GeForce GT 220
100%
Radeon HD 3850
102%
GeForce GT 430
103%
Radeon HD 5570
112%
Radeon HD 4670
118%
GeForce GT 440
121%
GeForce GT 240
139%
GeForce 9600 GT
147%
Radeon HD 5670
158%
GeForce GT 640
163%
GeForce 9800 GT
170%
Radeon HD 6670
175%
Radeon HD 4830
187%
Radeon HD 4770
198%
Radeon HD 4850
202%
GeForce GTS 250
208%
GeForce GTS 450
215%
Radeon HD 5750
246%
Radeon HD 7750
248%
Radeon HD 5770
252%
GeForce GTX 260
255%
Radeon HD 4870
256%
Radeon Vega 8
258%
GeForce GTX 550 Ti
261%
GeForce GTX 650
276%
Radeon HD 5830
290%
Radeon HD 6790
295%
Radeon HD 4890
306%
GeForce GTX 460
308%
Radeon RX Vega 11
311%
GeForce GT 1030
314%
GeForce GTX 275
315%
Radeon HD 7770 GHz Edition
316%
GeForce GTX 280
322%
GeForce GTX 465
337%
Radeon HD 6850
344%
GeForce GTX 285
369%
Radeon HD 5850
376%
GeForce GTX 650 Ti
376%
Radeon HD 7790
391%
Radeon RX 550
392%
GeForce GTX 470
406%
Radeon HD 6870
434%
Radeon HD 5870
447%
GeForce GTX 560 Ti
450%
Radeon HD 4870 X2
458%
GeForce GTX 750 Ti
460%
Radeon HD 6950
476%
GeForce GTX 295
482%
GeForce GTX 650 Ti Boost
485%
Radeon HD 7850
494%
GeForce GTX 480
517%
Radeon HD 6970
527%
Radeon R7 265
535%
Radeon RX 460
535%
Radeon R7 370
537%
GeForce GTX 660
539%
GeForce GTX 570
548%
Radeon RX 560
582%
GeForce GTX 950
587%
Radeon HD 7870 GHz Edition
601%
Radeon R9 270X
609%
GeForce GTX 660 Ti
611%
GeForce GTX 580
616%
GeForce GTX 1050
618%
Radeon HD 7950
630%
Radeon HD 5970
647%
GeForce GTX 760
697%
GeForce GTX 670
715%
GeForce GTX 960
733%
Radeon R9 380
738%
Radeon R9 285
745%
Radeon HD 7970
753%
GeForce GTX 680
770%
GeForce GTX 1050 Ti
790%
GeForce GTX 770
809%
Radeon HD 6990
828%
Radeon R9 280X
840%
GeForce GTX 590
840%
Radeon HD 7970 GHz Edition
931%
GeForce GTX 780
964%
GeForce GTX 1650
1024%
Radeon RX 470
1039%
Radeon R9 290
1095%
Radeon RX 570
1108%
Radeon R9 390
1114%
Radeon R9 290X
1129%
GeForce GTX 970
1144%
GeForce GTX TITAN
1159%
GeForce GTX 780 Ti
1176%
Radeon R9 390X
1181%
Radeon HD 7990
1187%
Radeon RX 480
1197%
GeForce GTX 690
1261%
Radeon RX 580
1287%
GeForce GTX 980
1304%
Radeon R9 FURY
1304%
GeForce GTX 1060 6 GB
1362%
Radeon RX 590
1434%
Radeon R9 295X2
1442%
GeForce GTX 1660
1459%
Radeon R9 FURY X
1483%
GeForce GTX 980 Ti
1522%
GeForce GTX TITAN X
1655%
GeForce GTX 1660 Ti
1655%
GeForce GTX 1070
1762%
Radeon RX Vega 56
1869%
GeForce GTX 1070 Ti
1922%
Radeon RX Vega 64
1949%
GeForce GTX 1080
1949%
GeForce RTX 2060
2029%
Radeon RX 5700
2189%
GeForce RTX 2060 SUPER
2270%
GeForce RTX 2070
2323%
Radeon RX 5700 XT
2350%
Radeon VII
2410%
TITAN X Pascal
2483%
GeForce GTX 1080 Ti
2510%
GeForce RTX 2070 SUPER
2670%
GeForce RTX 2080
2830%
GeForce RTX 2080 SUPER
3124%
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
668 MHz
Memory Clock
830 MHz
1660 MHz effective

Memory

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

Render Config

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

Theoretical Performance

Pixel Rate
10.69 GPixel/s
Texture Rate
10.69 GTexel/s
FP32 (float) performance
427.5 GFLOPS
FP64 (double) performance
85.50 GFLOPS (1:5)

Board Design

Slot Width
Single-slot
Length
8.2 inches
208 mm
TDP
75 W
Suggested PSU
350 W
Outputs
2x DVI
1x S-Video
Power Connectors
1x 6-pin
Board Number
B340,
B400

Graphics Features

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

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 (11)

Name GPU Clock Memory Clock Other Changes
ASUS HD 3850 Magic 669 MHz 400 MHz DDR2
ASUS HD 3850 OC Gear 669 MHz 829 MHz 8.21 inches/209 mm
ASUS HD 3850 Splendid Magic 668 MHz 828 MHz Dual-slot
ASUS HD 3850 TOP 730 MHz 950 MHz 8.21 inches/209 mm
Diamond Viper HD 3850 Ruby Edition 725 MHz 900 MHz Dual-slot
PowerColor HD 3850 Xtreme 720 MHz 900 MHz GDDR4, 1x DVI 1x HDMI 1x S-Video
Sapphire HD 3850 1 GB 668 MHz 500 MHz 1024 MB, DDR2
Sapphire HD 3850 1 GB 702 MHz 828 MHz 1024 MB
Sapphire HD 3850 256 MB 668 MHz 830 MHz 256 MB
Sapphire HD 3850 512 MB 668 MHz 830 MHz DDR2
Sapphire HD 3850 Ultimate 669 MHz 829 MHz