Mobility Radeon HD 3870 vs GeForce 620M
We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 1024MB VRAM GeForce 620M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Mobility Radeon HD 3870 Advantages
Larger VRAM bandwidth (54.40GB/s vs 14.40GB/s)
224 additional rendering cores
GeForce 620M Advantages
Released 3 years and 9 months late
More VRAM (1024GB vs 512GB)
Lower TDP (15W vs 55W)
Score
Benchmark
FP32 (float)
Mobility Radeon HD 3870
+75%
422
GeForce 620M
240
Graphics Card
Jun 2008
Release Date
Mar 2012
M8x
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
850 MHz
Memory Clock
900 MHz
Memory
512MB
Memory Size
1024MB
GDDR3
Memory Type
DDR3
256bit
Memory Bus
64bit
54.40GB/s
Bandwidth
14.40GB/s
Render Config
4
Compute Units
-
-
SM Count
2
320
Shading Units
96
16
TMUs
16
16
ROPs
8
-
L1 Cache
64 KB (per SM)
256 KB
L2 Cache
128 KB
Theoretical Performance
10.56 GPixel/s
Pixel Rate
2.500 GPixel/s
10.56 GTexel/s
Texture Rate
10.00 GTexel/s
422.4 GFLOPS
FP32 (float)
240.0 GFLOPS
84.48 GFLOPS
FP64 (double)
20.00 GFLOPS
Board Design
55W
TDP
15W
No outputs
Outputs
No outputs
Graphics Processor
M88
GPU Name
GF117
-
GPU Variant
N13P-GLP
TeraScale
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.666 billion
Transistors
0.585 billion
192 mm²
Die Size
116 mm²
Graphics Features
10.1 (10_1)
DirectX
12 (11_0)
3.3
OpenGL
4.6
N/A
OpenCL
1.1
N/A
Vulkan
N/A
-
CUDA
2.1
4.1
Shader Model
5.1
