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ATI Radeon HD 4850

Graphics Processor
RV770
Cores
800
TMUs
40
ROPs
16
Memory Size
512 MB
Memory Type
GDDR3
Bus Width
256 bit
GPU Chip
GPU
PCB Front
PCB Front
PCB Back
PCB Back
The Radeon HD 4850 was a performance graphics card by ATI, launched in June 2008. Built on the 55 nm process, and based on the RV770 graphics processor, in its RV770 PRO variant, the card supports DirectX 10.1. The RV770 graphics processor is an average sized chip with a die area of 256 mm² and 956 million transistors. It features 800 shading units, 40 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 625 MHz, memory is running at 993 MHz.
Being a single-slot card, the ATI Radeon HD 4850 draws power from 1x 6-pin power connectors, with power draw rated at 110 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 4850 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 246 mm in length, and features a single-slot cooling solution. Its price at launch was 199 US Dollars.

Graphics Processor

GPU Name
RV770
GPU Variant
RV770 PRO
(215-0669065)
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
956 million
Die Size
256 mm²

Graphics Card

Release Date
Jun 25th, 2008
Generation
Radeon R700
(HD 4800)
Production
End-of-life
Launch Price
199 USD
Bus Interface
PCIe 2.0 x16
Reviews
127 in our database

Relative Performance

13%
GeForce 210
16%
GeForce 9400 GT
20%
Radeon HD 4550
26%
Radeon HD 5450
30%
Radeon HD 6450
32%
GeForce GT 520
40%
GeForce GT 220
52%
GeForce GT 430
52%
Radeon HD 5570
57%
Radeon HD 4670
60%
GeForce GT 440
61%
GeForce GT 240
70%
GeForce 9600 GT
75%
Radeon HD 5670
80%
GeForce GT 640
83%
GeForce 9800 GT
86%
Radeon HD 6670
89%
Radeon HD 4830
95%
Radeon HD 4770
100%
Radeon HD 4850
102%
GeForce GTS 250
105%
GeForce GTS 450
109%
Radeon HD 5750
124%
Radeon HD 7750
125%
Radeon HD 5770
128%
GeForce GTX 260
129%
Radeon HD 4870
129%
Radeon Vega 8
131%
GeForce GTX 550 Ti
132%
GeForce GTX 650
140%
Radeon HD 5830
147%
Radeon HD 6790
149%
Radeon HD 4890
155%
GeForce GTX 460
156%
Radeon RX Vega 11
158%
GeForce GT 1030
159%
GeForce GTX 275
159%
Radeon HD 7770 GHz Edition
160%
GeForce GTX 280
163%
GeForce GTX 465
171%
Radeon HD 6850
174%
GeForce GTX 285
187%
Radeon HD 5850
190%
GeForce GTX 650 Ti
190%
Radeon HD 7790
198%
Radeon RX 550
199%
GeForce GTX 470
206%
Radeon HD 6870
220%
Radeon HD 5870
226%
GeForce GTX 560 Ti
228%
Radeon HD 4870 X2
232%
GeForce GTX 750 Ti
233%
Radeon HD 6950
241%
GeForce GTX 295
244%
GeForce GTX 650 Ti Boost
246%
Radeon HD 7850
250%
GeForce GTX 480
262%
Radeon HD 6970
267%
Radeon R7 265
271%
Radeon RX 460
271%
Radeon R7 370
272%
GeForce GTX 660
273%
GeForce GTX 570
277%
Radeon RX 560
295%
GeForce GTX 950
297%
Radeon HD 7870 GHz Edition
304%
Radeon R9 270X
308%
GeForce GTX 660 Ti
310%
GeForce GTX 580
312%
GeForce GTX 1050
313%
Radeon HD 7950
319%
Radeon HD 5970
328%
GeForce GTX 760
353%
GeForce GTX 670
362%
GeForce GTX 960
371%
Radeon R9 380
373%
Radeon R9 285
377%
Radeon HD 7970
381%
GeForce GTX 680
390%
GeForce GTX 1050 Ti
400%
GeForce GTX 770
409%
Radeon HD 6990
419%
Radeon R9 280X
425%
GeForce GTX 590
425%
Radeon HD 7970 GHz Edition
471%
GeForce GTX 780
488%
GeForce GTX 1650
519%
Radeon RX 470
526%
Radeon R9 290
554%
Radeon RX 570
561%
Radeon R9 390
564%
Radeon R9 290X
572%
GeForce GTX 970
579%
GeForce GTX TITAN
587%
GeForce GTX 780 Ti
595%
Radeon R9 390X
598%
Radeon HD 7990
601%
Radeon RX 480
606%
GeForce GTX 690
638%
Radeon RX 580
652%
GeForce GTX 980
660%
Radeon R9 FURY
660%
GeForce GTX 1060 6 GB
689%
Radeon RX 590
726%
Radeon R9 295X2
730%
GeForce GTX 1660
738%
Radeon R9 FURY X
751%
GeForce GTX 980 Ti
770%
GeForce GTX TITAN X
838%
GeForce GTX 1660 Ti
838%
GeForce GTX 1070
892%
Radeon RX Vega 56
946%
GeForce GTX 1070 Ti
973%
Radeon RX Vega 64
987%
GeForce GTX 1080
987%
GeForce RTX 2060
1027%
Radeon RX 5700
1108%
GeForce RTX 2060 SUPER
1149%
GeForce RTX 2070
1176%
Radeon RX 5700 XT
1190%
Radeon VII
1220%
TITAN X Pascal
1257%
GeForce GTX 1080 Ti
1271%
GeForce RTX 2070 SUPER
1352%
GeForce RTX 2080
1433%
GeForce RTX 2080 SUPER
1582%
GeForce RTX 2080 Ti
Based on TPU review data: "Performance Summary" at 1920x1080

Clock Speeds

GPU Clock
625 MHz
Memory Clock
993 MHz
1986 MHz effective

Memory

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

Render Config

Shading Units
800
TMUs
40
ROPs
16
Compute Units
10
L1 Cache
16 KB (per CU)
L2 Cache
256 KB

Theoretical Performance

Pixel Rate
10.00 GPixel/s
Texture Rate
25.00 GTexel/s
FP32 (float) performance
1,000 GFLOPS
FP64 (double) performance
200.0 GFLOPS (1:5)

Board Design

Slot Width
Single-slot
Length
9.69 inches
246 mm
TDP
110 W
Suggested PSU
350 W
Outputs
2x DVI
1x S-Video
Power Connectors
1x 6-pin
Board Number
B501-31

Graphics Features

DirectX
10.1 (10_1)
OpenGL
3.3
OpenCL
1.1
Vulkan
N/A
Shader Model
4.1

RV770 GPU Notes

Codename: Wekiva
Graphics/Compute: GFX3
Display Core Engine: 3.1
Unified Video Decoder: 2.0

Retail boards based on this design (12)

Name GPU Clock Memory Clock Other Changes
ASUS HD 4850 CUcore TOP 1 GB 670 MHz 1004 MHz 1024 MB, Dual-slot, 2x DVI
ASUS HD 4850 TOP 680 MHz 1050 MHz
ASUS ROG Matrix HD 4850 625 MHz 993 MHz Dual-slot
HIS HD 4850 IceQ 4 TurboX 685 MHz 1100 MHz 9.685 inches/246 mm, Dual-slot
Palit HD 4850 Sonic 1 GB 685 MHz 1000 MHz 1024 MB, Dual-slot
Palit HD 4850 Sonic Special 700 MHz 900 MHz GDDR5, Dual-slot, 1x DVI 1x HDMI 1x DisplayPort 1x VGA
PowerColor HD 4850 PCS+ 675 MHz 1100 MHz GDDR4, 9.5 inches/241 mm
PowerColor HD 4850 PCS+ 1 GB 665 MHz 950 MHz 1024 MB, 9.5 inches/241 mm
Sapphire HD 4850 625 MHz 1008 MHz
Sapphire HD 4850 Toxic 675 MHz 1150 MHz
Sapphire HD 4850 Vapor-X 650 MHz 1000 MHz 1x DVI 1x HDMI 1x VGA
Sapphire HD 4850 Vapor-X 1 GB 650 MHz 1000 MHz 1024 MB, 1x DVI 1x HDMI 1x VGA