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AMD Radeon HD 6490M Mac Edition

Seymour
Graphics Processor
160
Cores
8
TMUs
4
ROPs
256 MB
Memory Size
GDDR5
Memory Type
64 bit
Bus Width
AMD Radeon HD 6490M Mac Edition Photo AMD Seymour Photo
The Radeon HD 6490M Mac Edition was a graphics card by AMD, launched in May 2011. Built on the 40 nm process, and based on the Seymour graphics processor, in its Seymour XTX variant, the card supports DirectX 11.2. The Seymour graphics processor is a relatively small chip with a die area of only 67 mm² and 370 million transistors. It features 160 shading units, 8 texture mapping units and 4 ROPs. AMD has placed 256 MB GDDR5 memory on the card, which are connected using a 64-bit memory interface. The GPU is operating at a frequency of 750 MHz, memory is running at 794 MHz.
Its power draw is not exactly known. This device has no display connectivity, as it is not designed to have monitors connected to it. Radeon HD 6490M Mac Edition is connected to the rest of the system using a PCI-Express 2.0 x16 interface.

Graphics Processor

GPU Name
Seymour
GPU Variant
Seymour XTX
(216-0810005)
Architecture
TeraScale 2
Foundry
TSMC
Process Size
40 nm
Transistors
370 million
Die Size
67 mm²

Graphics Card

Release Date
May 2nd, 2011
Generation
Vancouver
(HD 6400M)
Production
End-of-life
Bus Interface
PCIe 2.0 x16

Relative Performance

35%
45%
55%
71%
83%
88%
100%
Radeon HD 6490M Mac Edition
109%
142%
144%
156%
165%
168%
193%
205%
220%
228%
237%
245%
261%
275%
281%
290%
300%
342%
345%
351%
356%
356%
360%
363%
384%
404%
411%
426%
429%
434%
438%
439%
440%
448%
470%
479%
514%
523%
523%
545%
547%
566%
604%
623%
627%
638%
641%
664%
672%
676%
688%
720%
734%
746%
746%
749%
751%
811%
818%
838%
848%
852%
859%
861%
876%
878%
902%
971%
996%
1022%
1028%
1038%
1049%
1073%
1101%
1127%
1154%
1170%
1171%
1297%
1428%
1447%
1544%
1552%
1573%
1594%
1608%
1615%
1638%
1646%
1654%
1667%
1757%
1793%
1817%
1817%
1998%
2033%
2067%
2222%
2440%
2526%
2722%
2722%
2871%
3204%
3359%
3445%
3755%
4272%
Based on TPU review data: "Performance Summary" at 1920x1080
Performance estimated based on architecture, shader count and clocks.

Clock Speeds

GPU Clock
750 MHz
Memory Clock
794 MHz
3176 MHz effective

Memory

Memory Size
256 MB
Memory Type
GDDR5
Memory Bus
64 bit
Bandwidth
25.41 GB/s

Render Config

Shading Units
160
TMUs
8
ROPs
4
Compute Units
2

Theoretical Performance

Pixel Rate
3.000 GPixel/s
Texture Rate
6.000 GTexel/s
FP32 (float) performance
240.0 GFLOPS

Board Design

TDP
unknown
Outputs
No outputs

Graphics Features

DirectX
11.2 (11_0)
OpenGL
4.4
OpenCL
1.2
Vulkan
N/A
Shader Model
5.0

Seymour GPU Notes

Chip Variant: Caicos
Graphics/Compute: GFX4
Display Core Engine: 5.0
Unified Video Decoder: 3.1