ATI Mobility Radeon X1900 vs AMD Radeon Pro 555X
We compared two Mobile platform GPUs: 256MB VRAM Mobility Radeon X1900 and 4GB VRAM Radeon Pro 555X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon Pro 555X 's Advantages
Released 11 years and 6 months late
More VRAM (4GB vs 256GB)
Larger VRAM bandwidth (94.08GB/s vs 30.08GB/s)
768 additional rendering cores
Score
Graphics Card
Jan 2007
Release Date
Jul 2018
M6x
Generation
Radeon Pro Mac
Mobile
Type
Mobile
MXM-III
Bus Interface
PCIe 3.0 x8
Clock Speeds
-
-
-
-
-
-
470 MHz
Memory Clock
1470 MHz
Memory
256MB
Memory Size
4GB
GDDR3
Memory Type
GDDR5
256bit
Memory Bus
128bit
30.08GB/s
Bandwidth
94.08GB/s
Render Config
-
Compute Units
12
-
-
-
-
Shading Units
768
12
TMUs
48
12
ROPs
16
-
-
-
-
-
-
-
L1 Cache
16 KB (per CU)
-
L2 Cache
1024 KB
-
-
-
Theoretical Performance
4.800 GPixel/s
Pixel Rate
14.51 GPixel/s
4.800 GTexel/s
Texture Rate
43.54 GTexel/s
-
FP16 (half)
1393 GFLOPS
-
FP32 (float)
1393 GFLOPS
-
FP64 (double)
87.07 GFLOPS
Board Design
Unknown
TDP
75W
-
-
-
Portable Device Dependent
Outputs
No outputs
-
Power Connectors
None
Graphics Processor
M68
GPU Name
Polaris 21
-
GPU Variant
Polaris 21 PRO
Ultra-Threaded SE
Architecture
GCN 4.0
TSMC
Foundry
GlobalFoundries
80 nm
Process Size
14 nm
0.312 billion
Transistors
3 billion
230 mm²
Die Size
123 mm²
Graphics Features
9.0c (9_3)
DirectX
12 (12_0)
2.1
OpenGL
4.6
N/A
OpenCL
2.1
N/A
Vulkan
1.2
-
-
-
3.0
Shader Model
6.4
