Home GPU Comparison AMD Radeon R5 M255 vs AMD Radeon HD 6450A

AMD Radeon R5 M255 vs AMD Radeon HD 6450A

We compared two Mobile platform GPUs: 2GB VRAM Radeon R5 M255 and 512MB VRAM Radeon HD 6450A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R5 M255 's Advantages
Released 3 years and 6 months late
Boost Clock940MHz
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (32.00GB/s vs 8.528GB/s)
224 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon R5 M255 +260%
0.721 TFLOPS
Radeon HD 6450A
0.2 TFLOPS
VS

Graphics Card

Oct 2014
Release Date
Apr 2011
Gem System
Generation
All-In-One
Mobile
Type
Mobile
PCIe 3.0 x8
Bus Interface
MXM-A (3.0)

Clock Speeds

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

Memory

2GB
Memory Size
512MB
DDR3
Memory Type
DDR3
128bit
Memory Bus
64bit
32.00GB/s
Bandwidth
8.528GB/s

Render Config

6
Compute Units
2
-
-
-
384
Shading Units
160
24
TMUs
8
8
ROPs
4
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
128 KB
-
-
-

Theoretical Performance

7.520 GPixel/s
Pixel Rate
2.500 GPixel/s
22.56 GTexel/s
Texture Rate
5.000 GTexel/s
721.9 GFLOPS
FP16 (half)
-
721.9 GFLOPS
FP32 (float)
200.0 GFLOPS
45.12 GFLOPS
FP64 (double)
-

Board Design

Unknown
TDP
25W
-
-
-
Portable Device Dependent
Outputs
No outputs
-
-
-

Graphics Processor

Topaz
GPU Name
Caicos
Topaz PRO (216-0858030)
GPU Variant
-
GCN 3.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
1.55 billion
Transistors
0.37 billion
125 mm²
Die Size
67 mm²

Graphics Features

12 (12_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.1
OpenCL
1.2
1.2.170
Vulkan
N/A
-
-
-
6.5
Shader Model
5.0

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