Home GPU Comparison AMD Radeon R9 M290X vs AMD Radeon HD 6990M Rebrand

AMD Radeon R9 M290X vs AMD Radeon HD 6990M Rebrand

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M290X and 1024MB VRAM Radeon HD 6990M Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M290X 's Advantages
Released 2 years and 6 months late
Boost Clock900MHz
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (153.6GB/s vs 70.40GB/s)
480 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon R9 M290X +80%
2.304 TFLOPS
Radeon HD 6990M Rebrand
1.28 TFLOPS
VS

Graphics Card

Jan 2014
Release Date
Jul 2011
Crystal System
Generation
Vancouver
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
MXM-B (3.0)

Clock Speeds

850 MHz
Base Clock
-
900 MHz
Boost Clock
-
1200 MHz
Memory Clock
1100 MHz

Memory

4GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
153.6GB/s
Bandwidth
70.40GB/s

Render Config

20
Compute Units
14
-
-
-
1280
Shading Units
800
80
TMUs
40
32
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
512 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

28.80 GPixel/s
Pixel Rate
12.80 GPixel/s
72.00 GTexel/s
Texture Rate
32.00 GTexel/s
-
-
-
2.304 TFLOPS
FP32 (float)
1280 GFLOPS
144.0 GFLOPS
FP64 (double)
-

Board Design

100W
TDP
100W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-

Graphics Processor

Neptune
GPU Name
Broadway
Neptune XT (216-0847000)
GPU Variant
Broadway XTX
GCN 1.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
2.8 billion
Transistors
1.04 billion
212 mm²
Die Size
166 mm²

Graphics Features

12 (11_1)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
1.2
OpenCL
1.2
1.2
Vulkan
N/A
-
-
-
5.1
Shader Model
5.0

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