AMD Radeon RX 6900 XTX vs AMD Radeon RX 580X Mobile
GPU · Specs Compare
Graphics Card
Release Date
Unknown
Apr 2018
Generation
Navi II
Mobility Radeon
Type
Desktop
Mobile
Bus Interface
PCIe 4.0 x16
MXM-B (3.0)
Clock Speeds
Base Clock
2075 MHz
1000 MHz
Boost Clock
2435 MHz
1077 MHz
Memory Clock
2250 MHz
2000 MHz
Memory
Memory Size
16GB
8GB
Memory Type
GDDR6
GDDR5
Memory Bus
256bit
256bit
Bandwidth
576.0GB/s
256.0GB/s
Render Config
Compute Units
80
36
Shading Units
5120
2304
TMUs
320
144
ROPs
128
32
RT Cores
80
—
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
4 MB
2 MB
L3 Cache
128 MB
—
Theoretical Performance
Pixel Rate
311.7 GPixel/s
34.46 GPixel/s
Texture Rate
779.2 GTexel/s
155.1 GTexel/s
FP16 (half)
49.87 TFLOPS
4.963 TFLOPS
FP32 (float)
24.93 TFLOPS
4.963 TFLOPS
FP64 (double)
1.558 TFLOPS
310.2 GFLOPS
Graphics Processor
GPU Name
Navi 21
Polaris 20
GPU Variant
Navi 21 XTXH(215-121000247)
Polaris 20M XT
Architecture
RDNA 2.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
7 nm
14 nm
Transistors
26.8 billion
5.7 billion
Die Size
520 mm²
232 mm²
Board Design
TDP
330W
100W
Suggested PSU
700 W
—
Outputs
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
No outputs
Power Connectors
2x 8-pin
None
Graphics Features
DirectX
12 Ultimate (12_2)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.1
2.1
Vulkan
1.3
1.2
Shader Model
6.5
6.4
▲ Specs Compare
Data sourced from official specifications and benchmark tests.