AMD Radeon RX 6900 XT vs AMD Radeon RX 640 Mobile
GPU Specs Compare
Graphics Card
Release Date
Oct 2020
May 2019
Generation
Navi II
Mobility Radeon
Type
Desktop
Mobile
Bus Interface
PCIe 4.0 x16
PCIe 3.0 x8
Clock Speeds
Base Clock
1825 MHz
1082 MHz
Boost Clock
2250 MHz
1218 MHz
Memory Clock
2000 MHz
1500 MHz
Memory
Memory Size
16GB
2GB
Memory Type
GDDR6
GDDR5
Memory Bus
256bit
64bit
Bandwidth
512.0GB/s
48.00GB/s
Render Config
Compute Units
80
10
Shading Units
5120
640
TMUs
320
40
ROPs
128
16
RT Cores
80
-
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
4 MB
512 KB
L3 Cache
128 MB
-
Theoretical Performance
Pixel Rate
288.0 GPixel/s
19.49 GPixel/s
Texture Rate
720.0 GTexel/s
48.72 GTexel/s
FP16 (half)
46.08 TFLOPS
1.559 TFLOPS
FP32 (float)
23.04 TFLOPS
1.559 TFLOPS
FP64 (double)
1440.0 GFLOPS
97.44 GFLOPS
Graphics Processor
GPU Name
Navi 21
Polaris 23
GPU Variant
Navi 21 XTX(215-121000167)
Polaris 23 XT
Architecture
RDNA 2.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
7 nm
14 nm
Transistors
26.8 billion
2.2 billion
Die Size
520 mm²
103 mm²
Board Design
TDP
300W
50W
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
1.4
1.2
Shader Model
6.8
6.4
📊 Benchmark
3DMark Time Spy
20,764
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