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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. Since Radeon HD 4850 X2 does not support DirectX 11 or DirectX 12, it might not be able to run all the latest games. 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 paired 1,024 MB GDDR3 memory with the Radeon HD 4850 X2, 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 connector, 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
Reviews
26 in our database

Relative Performance

7%
GeForce 210
9%
GeForce 9400 GT
11%
Radeon HD 4550
14%
Radeon HD 5450
16%
Radeon HD 6450
17%
GeForce GT 520
21%
GeForce GT 220
27%
GeForce GT 430
28%
Radeon HD 5570
30%
Radeon HD 4670
32%
GeForce GT 440
32%
GeForce GT 240
37%
GeForce 9600 GT
39%
Radeon HD 5670
42%
GeForce GT 640
44%
GeForce 9800 GT
45%
Radeon HD 6670
47%
Radeon HD 4830
50%
Radeon HD 4770
53%
Radeon HD 4850
54%
GeForce GTS 250
55%
GeForce GTS 450
57%
Radeon HD 5750
66%
Radeon HD 7750
66%
Radeon HD 5770
67%
GeForce GTX 260
68%
Radeon HD 4870
68%
Radeon Vega 8
69%
GeForce GTX 550 Ti
70%
GeForce GTX 650
74%
Radeon HD 5830
77%
Radeon HD 6790
79%
Radeon HD 4890
82%
GeForce GTX 460
82%
Radeon RX Vega 11
83%
GeForce GT 1030
84%
GeForce GTX 275
84%
Radeon HD 7770 GHz Edition
84%
GeForce GTX 280
86%
GeForce GTX 465
90%
Radeon HD 6850
92%
GeForce GTX 285
98%
Radeon HD 5850
100%
Radeon HD 4850 X2
100%
GeForce GTX 650 Ti
100%
Radeon HD 7790
104%
Radeon RX 550
105%
GeForce GTX 470
108%
Radeon HD 6870
116%
Radeon HD 5870
119%
GeForce GTX 560 Ti
120%
Radeon HD 4870 X2
122%
GeForce GTX 750 Ti
123%
Radeon HD 6950
127%
GeForce GTX 295
129%
GeForce GTX 650 Ti Boost
130%
Radeon HD 7850
132%
GeForce GTX 480
138%
Radeon HD 6970
141%
Radeon R7 265
143%
Radeon RX 460
143%
Radeon R7 370
143%
GeForce GTX 660
144%
GeForce GTX 570
146%
Radeon RX 560
155%
GeForce GTX 950
157%
Radeon HD 7870 GHz Edition
160%
Radeon R9 270X
162%
GeForce GTX 660 Ti
163%
GeForce GTX 580
164%
GeForce GTX 1050
165%
Radeon HD 7950
168%
Radeon HD 5970
173%
GeForce GTX 760
186%
GeForce GTX 670
191%
GeForce GTX 960
196%
Radeon R9 380
197%
Radeon R9 285
199%
Radeon HD 7970
201%
GeForce GTX 680
206%
GeForce GTX 1050 Ti
211%
GeForce GTX 770
216%
Radeon HD 6990
221%
Radeon R9 280X
224%
GeForce GTX 590
224%
Radeon HD 7970 GHz Edition
248%
GeForce GTX 780
257%
GeForce GTX 1650
273%
Radeon RX 470
277%
Radeon R9 290
292%
Radeon RX 570
296%
Radeon R9 390
297%
Radeon R9 290X
301%
GeForce GTX 970
305%
GeForce GTX TITAN
309%
GeForce GTX 780 Ti
314%
Radeon R9 390X
315%
Radeon HD 7990
317%
Radeon RX 480
319%
GeForce GTX 690
328%
GeForce GTX 1060 6 GB
332%
Radeon RX 5500 OEM
336%
Radeon RX 580
339%
Radeon RX 5500 XT
343%
GeForce GTX 980
346%
GeForce GTX 1650 SUPER
348%
Radeon R9 FURY
363%
Radeon RX 590
383%
Radeon R9 295X2
385%
GeForce GTX 1660
389%
Radeon R9 FURY X
396%
GeForce GTX 980 Ti
406%
GeForce GTX TITAN X
432%
GeForce GTX 1660 SUPER
442%
GeForce GTX 1660 Ti
442%
GeForce GTX 1070
470%
Radeon RX Vega 56
499%
GeForce GTX 1070 Ti
513%
Radeon RX Vega 64
520%
GeForce GTX 1080
520%
GeForce RTX 2060
541%
Radeon RX 5700
584%
GeForce RTX 2060 SUPER
606%
GeForce RTX 2070
620%
Radeon RX 5700 XT
627%
Radeon VII
643%
TITAN X Pascal
663%
GeForce GTX 1080 Ti
670%
GeForce RTX 2070 SUPER
712%
GeForce RTX 2080
755%
GeForce RTX 2080 SUPER
834%
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
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
Dual-slot
Length
267 mm
10.5 inches
TDP
250 W
Suggested PSU
600 W
Outputs
4x DVI
1x S-Video
Power Connectors
1x 6-pin + 1x 8-pin
Board Number
B501

Graphics Features

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

R700 GPU Notes

Codename: Wekiva
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