AMD Radeon RX 6900 XTX vs AMD Radeon RX 455 OEM
GPU Specs Compare
Graphics Card
Release Date
Unknown
Jun 2016
Generation
Navi II
Arctic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
2075 MHz
-
Boost Clock
2435 MHz
-
Memory Clock
2250 MHz
1625 MHz
Memory
Memory Size
16GB
2GB
Memory Type
GDDR6
GDDR5
Memory Bus
256bit
128bit
Bandwidth
576.0GB/s
104.0GB/s
Render Config
Compute Units
80
12
Shading Units
5120
768
TMUs
320
48
ROPs
128
16
RT Cores
80
-
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
4 MB
256 KB
L3 Cache
128 MB
-
Theoretical Performance
Pixel Rate
311.7 GPixel/s
16.80 GPixel/s
Texture Rate
779.2 GTexel/s
50.40 GTexel/s
FP16 (half)
49.87 TFLOPS
-
FP32 (float)
24.93 TFLOPS
1.613 TFLOPS
FP64 (double)
1.558 TFLOPS
100.8 GFLOPS
Graphics Processor
GPU Name
Navi 21
Tobago
GPU Variant
Navi 21 XTXH(215-121000247)
Tobago PRO(215-0875010)
Architecture
RDNA 2.0
GCN 2.0
Foundry
TSMC
TSMC
Process Size
7 nm
28 nm
Transistors
26.8 billion
2.08 billion
Die Size
520 mm²
160 mm²
Board Design
TDP
330W
100W
Suggested PSU
700 W
300 W
Outputs
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
1x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
2x 8-pin
1x 6-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.1
2.0
Vulkan
1.3
1.2
Shader Model
6.5
6.3