Home GPU Comparison AMD Radeon R5 M255 vs NVIDIA GeForce 800M

AMD Radeon R5 M255 vs NVIDIA GeForce 800M

We compared two Mobile platform GPUs: 2GB VRAM Radeon R5 M255 and 1024MB VRAM GeForce 800M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R5 M255 's Advantages
Released 7 months late
Boost Clock940MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (32.00GB/s vs 14.40GB/s)
336 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon R5 M255 +407%
0.721 TFLOPS
GeForce 800M
0.142 TFLOPS
VS

Graphics Card

Oct 2014
Release Date
Mar 2014
Gem System
Generation
GeForce 800M
Mobile
Type
Mobile
PCIe 3.0 x8
Bus Interface
PCIe 2.0 x16

Clock Speeds

925 MHz
Base Clock
-
940 MHz
Boost Clock
-
1000 MHz
Memory Clock
900 MHz

Memory

2GB
Memory Size
1024MB
DDR3
Memory Type
DDR3
128bit
Memory Bus
64bit
32.00GB/s
Bandwidth
14.40GB/s

Render Config

6
Compute Units
-
-
SM Count
1
384
Shading Units
48
24
TMUs
8
8
ROPs
8
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
64 KB (per SM)
256 KB
L2 Cache
128 KB
-
-
-

Theoretical Performance

7.520 GPixel/s
Pixel Rate
1.476 GPixel/s
22.56 GTexel/s
Texture Rate
5.904 GTexel/s
721.9 GFLOPS
FP16 (half)
-
721.9 GFLOPS
FP32 (float)
141.7 GFLOPS
45.12 GFLOPS
FP64 (double)
11.81 GFLOPS

Board Design

Unknown
TDP
15W
-
-
-
Portable Device Dependent
Outputs
No outputs
-
-
-

Graphics Processor

Topaz
GPU Name
GF117
Topaz PRO (216-0858030)
GPU Variant
N14M-GL
GCN 3.0
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.55 billion
Transistors
0.585 billion
125 mm²
Die Size
116 mm²

Graphics Features

12 (12_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.1
OpenCL
1.1
1.2.170
Vulkan
N/A
-
CUDA
2.1
6.5
Shader Model
5.1

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