AMD Radeon Sky 900 vs NVIDIA RTX A4000
GPU · Specs Compare
Graphics Card
Release Date
Mar 2013
Apr 2021
Generation
Radeon Sky
Quadro Ampere
Type
Desktop
Professional
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
825 MHz
735 MHz
Boost Clock
950 MHz
1560 MHz
Memory Clock
1250 MHz
1750 MHz
Memory
Memory Size
3GB
16GB
Memory Type
GDDR5
GDDR6
Memory Bus
384bit
256bit
Bandwidth
240.0GB/s
448.0GB/s
Render Config
Compute Units
28
—
Shading Units
1792
6144
TMUs
112
192
ROPs
32
96
L1 Cache
16 KB (per CU)
128 KB (per SM)
L2 Cache
768 KB
4 MB
SM Count
—
48
Tensor Cores
—
192
RT Cores
—
48
Theoretical Performance
Pixel Rate
30.40 GPixel/s
149.8 GPixel/s
Texture Rate
106.4 GTexel/s
299.5 GTexel/s
FP32 (float)
3.405 TFLOPS
19.17 TFLOPS
FP64 (double)
851.2 GFLOPS
299.5 GFLOPS
FP16 (half)
—
19.17 TFLOPS
Graphics Processor
GPU Name
Tahiti
GA104
GPU Variant
Orthrus
GA104-875-A1
Architecture
GCN 1.0
Ampere
Foundry
TSMC
Samsung
Process Size
28 nm
8 nm
Transistors
4.313 billion
17.4 billion
Die Size
352 mm²
392 mm²
Board Design
TDP
300W
140W
Suggested PSU
700 W
300 W
Outputs
1x DVI1x mini-DisplayPort 1.2
4x DisplayPort 1.4a
Power Connectors
2x 8-pin
1x 6-pin
Graphics Features
DirectX
12 (11_1)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
1.2
3.0
Vulkan
1.2
1.3
Shader Model
5.1
6.7
CUDA
—
8.6
Benchmark
3DMark Time Spy
—
11,079
3DMark Time Spy Extreme
—
5,367
OctaneBench
—
352
▲ Specs Compare
Data sourced from official specifications and benchmark tests.