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AMD Radeon HD 7770M

Chelsea
Graphics Processor
512
Cores
32
TMUs
16
ROPs
1024 MB
Memory Size
GDDR5
Memory Type
128 bit
Bus Width
AMD Radeon HD 7770M Photo AMD Chelsea Photo
The Radeon HD 7770M was a graphics card by AMD, launched in April 2012. Built on the 28 nm process, and based on the Chelsea graphics processor, in its Chelsea XT variant, the card supports DirectX 12.0. The Chelsea graphics processor is an average sized chip with a die area of 123 mm² and 1,500 million transistors. It features 512 shading units, 32 texture mapping units and 16 ROPs. AMD has placed 1,024 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 32 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it. Radeon HD 7770M is connected to the rest of the system using a PCI-Express 2.0 x16 interface.

Graphics Processor

GPU Name
Chelsea
GPU Variant
Chelsea XT
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 7700M)
Production
End-of-life
Bus Interface
PCIe 2.0 x16

Relative Performance

12%
16%
19%
25%
29%
30%
38%
49%
50%
54%
57%
58%
67%
71%
76%
79%
82%
85%
90%
95%
97%
100%
Radeon HD 7770M
100%
104%
119%
119%
122%
123%
123%
125%
126%
133%
140%
142%
148%
149%
150%
151%
152%
152%
155%
163%
166%
178%
181%
181%
189%
189%
196%
209%
216%
217%
221%
222%
230%
233%
234%
238%
249%
254%
258%
258%
259%
260%
281%
283%
290%
294%
295%
297%
298%
303%
304%
312%
336%
345%
354%
356%
359%
363%
372%
381%
390%
399%
405%
405%
449%
494%
501%
534%
537%
545%
552%
556%
559%
567%
570%
572%
577%
608%
621%
629%
629%
692%
704%
715%
769%
845%
874%
942%
942%
994%
1109%
1163%
1192%
1300%
1479%
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
1024 MB
Memory Type
GDDR5
Memory Bus
128 bit
Bandwidth
64.00 GB/s

Render Config

Shading Units
512
TMUs
32
ROPs
16
Compute Units
8

Theoretical Performance

Pixel Rate
10.80 GPixel/s
Texture Rate
21.60 GTexel/s
FP32 (float) performance
691.2 GFLOPS
FP64 (double) performance
43.20 GFLOPS (1:16)

Board Design

TDP
32 W
Outputs
No outputs

Graphics Features

DirectX
12.0 (11_1)
OpenGL
4.5
OpenCL
1.2
Vulkan
1.1.86
Shader Model
5.1

Chelsea GPU Notes

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

Retail boards based on this design (1)

Name GPU Clock Memory Clock Other Changes
AMD Radeon HD 7770M 2 GB 675 MHz 1000 MHz 2 GB