GeForce 840M vs Radeon HD 7490M
We compared two Mobile platform GPUs: 2GB VRAM GeForce 840M and 1024MB VRAM Radeon HD 7490M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce 840M Advantages
Released 2 years and 2 months late
Boost Clock1124MHz
More VRAM (2GB vs 1024GB)
224 additional rendering cores
Radeon HD 7490M Advantages
Larger VRAM bandwidth (30.40GB/s vs 16.02GB/s)
Lower TDP (9W vs 33W)
Score
Benchmark
FP32 (float)
GeForce 840M
+237%
863
Radeon HD 7490M
256
Graphics Card
Mar 2014
Release Date
Jan 2012
GeForce 800M
Generation
London
Mobile
Type
Mobile
PCIe 3.0 x8
Bus Interface
PCIe 2.0 x16
Clock Speeds
1029 MHz
Base Clock
-
1124 MHz
Boost Clock
-
1001 MHz
Memory Clock
950 MHz
Memory
2GB
Memory Size
1024MB
DDR3
Memory Type
GDDR5
64bit
Memory Bus
64bit
16.02GB/s
Bandwidth
30.40GB/s
Render Config
-
Compute Units
2
384
Shading Units
160
16
TMUs
8
8
ROPs
4
64 KB (per SMM)
L1 Cache
8 KB (per CU)
1024 KB
L2 Cache
128 KB
Theoretical Performance
8.992 GPixel/s
Pixel Rate
3.200 GPixel/s
17.98 GTexel/s
Texture Rate
6.400 GTexel/s
863.2 GFLOPS
FP32 (float)
256.0 GFLOPS
26.98 GFLOPS
FP64 (double)
-
Board Design
33W
TDP
9W
No outputs
Outputs
No outputs
Graphics Processor
GM108
GPU Name
Seymour
N15S-GT
GPU Variant
Seymour XTX
(216-0810005)
(216-0810005)
Maxwell
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
Unknown
Transistors
0.37 billion
Unknown
Die Size
67 mm²
Graphics Features
12 (11_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
3.0
OpenCL
1.2
1.3
Vulkan
N/A
5.0
CUDA
-
5.1
Shader Model
5.0