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ATI Radeon HD 4850 X2

Graphics Processor
R700 x2
Cores
800 x2
TMUs
40 x2
ROPs
16 x2
Memory Size
512 MB x2
Memory Type
GDDR3
Bus Width
256 bit x2
The Radeon HD 4850 X2 was a high-end graphics card by ATI, launched in November 2008. Built on the 55 nm process, and based on the R700 graphics processor, in its R700 PRO variant, the card supports DirectX 10.1. The R700 graphics processor is an average sized chip with a die area of 256 mm² and 956 million transistors. Radeon HD 4850 X2 combines two graphics processors to increase performance. It features 800 shading units, 40 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 625 MHz, memory is running at 995 MHz.
Being a dual-slot card, the ATI Radeon HD 4850 X2 draws power from 1x 6-pin + 1x 8-pin power connectors, with power draw rated at 250 W maximum. Display outputs include: 4x DVI, 1x S-Video. Radeon HD 4850 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 420 US Dollars.

Graphics Processor

GPU Name
R700
GPU Variant
R700 PRO
(215-0669065)
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
956 million
Die Size
256 mm²

Graphics Card

Release Date
Nov 7th, 2008
Generation
Radeon R700
(HD 4800)
Production
End-of-life
Launch Price
420 USD
Bus Interface
PCIe 2.0 x16

Relative Performance

6%
GeForce 210
8%
GeForce 9400 GT
10%
Radeon HD 4550
13%
Radeon HD 5450
15%
Radeon HD 6450
16%
GeForce GT 520
19%
GeForce GT 220
25%
GeForce GT 430
26%
Radeon HD 5570
28%
Radeon HD 4670
29%
GeForce GT 440
30%
GeForce GT 240
35%
GeForce 9600 GT
37%
Radeon HD 5670
39%
GeForce GT 640
41%
GeForce 9800 GT
42%
Radeon HD 6670
44%
Radeon HD 4830
47%
Radeon HD 4770
49%
Radeon HD 4850
50%
GeForce GTS 250
52%
GeForce GTS 450
54%
Radeon HD 5750
61%
Radeon HD 7750
62%
Radeon HD 5770
63%
GeForce GTX 260
64%
Radeon HD 4870
64%
Radeon Vega 8
64%
GeForce GTX 550 Ti
65%
GeForce GTX 650
69%
Radeon HD 5830
72%
Radeon HD 6790
73%
Radeon HD 4890
76%
GeForce GTX 460
77%
Radeon RX Vega 11
77%
GeForce GT 1030
78%
GeForce GTX 275
78%
Radeon HD 7770 GHz Edition
79%
GeForce GTX 280
80%
GeForce GTX 465
84%
Radeon HD 6850
86%
GeForce GTX 285
92%
Radeon HD 5850
94%
GeForce GTX 650 Ti
94%
Radeon HD 7790
97%
Radeon RX 550
98%
GeForce GTX 470
100%
Radeon HD 4850 X2
101%
Radeon HD 6870
108%
Radeon HD 5870
111%
GeForce GTX 560 Ti
112%
Radeon HD 4870 X2
114%
GeForce GTX 750 Ti
115%
Radeon HD 6950
119%
GeForce GTX 295
120%
GeForce GTX 650 Ti Boost
121%
Radeon HD 7850
123%
GeForce GTX 480
129%
Radeon HD 6970
131%
Radeon R7 265
133%
Radeon R7 370
133%
Radeon RX 560
134%
GeForce GTX 660
134%
GeForce GTX 570
145%
GeForce GTX 950
146%
Radeon HD 7870 GHz Edition
150%
Radeon R9 270X
152%
GeForce GTX 660 Ti
152%
GeForce GTX 580
153%
GeForce GTX 1050
154%
Radeon HD 7950
157%
Radeon RX 460
157%
Radeon HD 5970
161%
GeForce GTX 760
174%
GeForce GTX 670
178%
GeForce GTX 960
183%
Radeon R9 380
184%
Radeon R9 285
186%
Radeon HD 7970
187%
GeForce GTX 680
192%
GeForce GTX 1050 Ti
197%
GeForce GTX 770
201%
Radeon HD 6990
206%
Radeon R9 280X
209%
GeForce GTX 590
209%
Radeon HD 7970 GHz Edition
232%
GeForce GTX 780
255%
Radeon RX 470
259%
Radeon R9 290
276%
Radeon R9 390
277%
Radeon R9 290X
281%
GeForce GTX 970
285%
GeForce GTX TITAN
287%
Radeon RX 570
289%
GeForce GTX 780 Ti
293%
Radeon R9 390X
294%
Radeon HD 7990
296%
Radeon RX 480
298%
GeForce GTX 690
314%
Radeon RX 580
321%
GeForce GTX 980
325%
GeForce GTX 1060 6 GB
325%
Radeon R9 FURY
326%
Radeon RX 590
357%
Radeon R9 295X2
363%
Radeon R9 FURY X
369%
GeForce GTX 980 Ti
397%
GeForce GTX TITAN X
417%
GeForce GTX 1660 Ti
419%
GeForce GTX 1070
437%
Radeon RX Vega 56
474%
GeForce GTX 1070 Ti
486%
Radeon RX Vega 64
486%
GeForce RTX 2060
499%
GeForce GTX 1080
573%
Radeon VII
573%
GeForce RTX 2070
600%
TITAN X Pascal
616%
GeForce GTX 1080 Ti
665%
GeForce RTX 2080
770%
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
625 MHz
Memory Clock
995 MHz
1990 MHz effective

Memory

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

Render Config

Shading Units
800
TMUs
40
ROPs
16
Compute Units
10

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
Dual-slot
Length
10.51 inches
267 mm
TDP
250 W
Outputs
4x DVI
1x S-Video
Power Connectors
1x 6-pin + 1x 8-pin
Board Number
B501

Graphics Features

DirectX
10.1
OpenGL
3.3
OpenCL
1.1
Vulkan
N/A
Shader Model
4.1

R700 GPU Notes

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

Retail boards based on this design (1)

Name GPU Clock Memory Clock Other Changes
Sapphire HD 4850 X2 2 GB 625 MHz 995 MHz 1024 MB