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AMD Radeon HD 7850M

Graphics Processor
Heathrow
Cores
640
TMUs
40
ROPs
16
Memory Size
2 GB
Memory Type
GDDR5
Bus Width
128 bit
The Radeon HD 7850M was a graphics card by AMD, launched in April 2012. Built on the 28 nm process, and based on the Heathrow graphics processor, in its Heathrow PRO variant, the card supports DirectX 12.0. The Heathrow graphics processor is an average sized chip with a die area of 123 mm² and 1,500 million transistors. It features 640 shading units, 40 texture mapping units and 16 ROPs. AMD has placed 2,048 MB GDDR5 memory on the card, which are connected using a 128-bit memory interface. The GPU is operating at a frequency of 675 MHz, memory is running at 1000 MHz.
Its power draw is rated at 40 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it. Radeon HD 7850M is connected to the rest of the system using a PCI-Express 3.0 x16 interface.

Graphics Processor

GPU Name
Heathrow
GPU Variant
Heathrow PRO
Architecture
GCN 1.0
Foundry
TSMC
Process Size
28 nm
Transistors
1,500 million
Die Size
123 mm²

Graphics Card

Release Date
Apr 24th, 2012
Generation
London
(HD 7800M)
Production
End-of-life
Bus Interface
PCIe 3.0 x16

Relative Performance

12%
GeForce 210
15%
GeForce 9400 GT
19%
Radeon HD 4550
24%
Radeon HD 5450
28%
Radeon HD 6450
30%
GeForce GT 520
37%
GeForce GT 220
48%
GeForce GT 430
49%
Radeon HD 5570
53%
Radeon HD 4670
56%
GeForce GT 440
57%
GeForce GT 240
65%
GeForce 9600 GT
69%
Radeon HD 5670
74%
GeForce GT 640
77%
GeForce 9800 GT
80%
Radeon HD 6670
83%
Radeon HD 4830
88%
Radeon HD 4770
93%
Radeon HD 4850
95%
GeForce GTS 250
98%
GeForce GTS 450
100%
Radeon HD 7850M
101%
Radeon HD 5750
116%
Radeon HD 7750
116%
Radeon HD 5770
119%
GeForce GTX 260
120%
Radeon HD 4870
120%
Radeon Vega 8
122%
GeForce GTX 550 Ti
123%
GeForce GTX 650
130%
Radeon HD 5830
136%
Radeon HD 6790
139%
Radeon HD 4890
144%
GeForce GTX 460
145%
Radeon RX Vega 11
146%
GeForce GT 1030
148%
GeForce GTX 275
148%
Radeon HD 7770 GHz Edition
148%
GeForce GTX 280
151%
GeForce GTX 465
159%
Radeon HD 6850
162%
GeForce GTX 285
173%
Radeon HD 5850
177%
Radeon HD 7790
177%
GeForce GTX 650 Ti
184%
Radeon RX 550
184%
GeForce GTX 470
191%
Radeon HD 6870
204%
Radeon HD 5870
210%
GeForce GTX 560 Ti
211%
Radeon HD 4870 X2
215%
GeForce GTX 750 Ti
216%
Radeon HD 6950
224%
GeForce GTX 295
227%
GeForce GTX 650 Ti Boost
228%
Radeon HD 7850
232%
GeForce GTX 480
243%
Radeon HD 6970
248%
Radeon R7 265
252%
Radeon R7 370
252%
Radeon RX 560
253%
GeForce GTX 660
253%
GeForce GTX 570
274%
GeForce GTX 950
276%
Radeon HD 7870 GHz Edition
283%
Radeon R9 270X
286%
GeForce GTX 660 Ti
288%
GeForce GTX 580
290%
GeForce GTX 1050
290%
Radeon HD 7950
296%
Radeon RX 460
296%
Radeon HD 5970
304%
GeForce GTX 760
328%
GeForce GTX 670
336%
GeForce GTX 960
345%
Radeon R9 380
347%
Radeon R9 285
350%
Radeon HD 7970
354%
GeForce GTX 680
362%
GeForce GTX 1050 Ti
372%
GeForce GTX 770
380%
Radeon HD 6990
389%
Radeon R9 280X
395%
GeForce GTX 590
395%
Radeon HD 7970 GHz Edition
438%
GeForce GTX 780
482%
Radeon RX 470
488%
Radeon R9 290
521%
Radeon R9 390
524%
Radeon R9 290X
531%
GeForce GTX 970
538%
GeForce GTX TITAN
543%
Radeon RX 570
545%
GeForce GTX 780 Ti
553%
Radeon R9 390X
555%
Radeon HD 7990
558%
Radeon RX 480
563%
GeForce GTX 690
593%
Radeon RX 580
605%
GeForce GTX 980
613%
Radeon R9 FURY
613%
GeForce GTX 1060 6 GB
674%
Radeon R9 295X2
686%
Radeon R9 FURY X
698%
GeForce GTX 980 Ti
750%
GeForce GTX TITAN X
824%
GeForce GTX 1070
853%
Radeon RX Vega 56
918%
GeForce GTX 1070 Ti
918%
Radeon RX Vega 64
969%
GeForce GTX 1080
1081%
GeForce RTX 2070
1134%
TITAN X Pascal
1163%
GeForce GTX 1080 Ti
1267%
GeForce RTX 2080
1442%
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
675 MHz
Memory Clock
1000 MHz
4000 MHz effective

Memory

Memory Size
2 GB
Memory Type
GDDR5
Memory Bus
128 bit
Bandwidth
64.00 GB/s

Render Config

Shading Units
640
TMUs
40
ROPs
16
Compute Units
10

Theoretical Performance

Pixel Rate
10.80 GPixel/s
Texture Rate
27.00 GTexel/s
FP32 (float) performance
864.0 GFLOPS
FP64 (double) performance
54.00 GFLOPS (1:16)

Board Design

TDP
40 W
Outputs
No outputs

Graphics Features

DirectX
12.0 (11_1)
OpenGL
4.6
OpenCL
1.2
Vulkan
1.1.86
Shader Model
5.1

Heathrow GPU Notes

Chip Variant: Cape Verde
CLRX Version: GCN 1.0
Graphics/Compute: GFX6 (gfx601)
Display Core Engine: 6.0
Unified Video Decoder: 4.0
Video Compression Engine: 1.0