Home GPU Comparison AMD Radeon RX 6900 XT vs AMD Radeon RX 550 640SP

AMD Radeon RX 6900 XT vs AMD Radeon RX 550 640SP

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XT and 2GB VRAM Radeon RX 550 640SP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6900 XT 's Advantages
Released 3 years late
Boost Clock has increased by 110% (2250MHz vs 1071MHz)
More VRAM (16GB vs 2GB)
Larger VRAM bandwidth (512.0GB/s vs 96.00GB/s)
4480 additional rendering cores
AMD Radeon RX 550 640SP 's Advantages
Lower TDP (60W vs 300W)

Score

Benchmark

FP32 (float)
Radeon RX 6900 XT +1580%
23.04 TFLOPS
Radeon RX 550 640SP
1.371 TFLOPS
VS

Graphics Card

Oct 2020
Release Date
Oct 2017
Navi II
Generation
Polaris
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x8

Clock Speeds

1825 MHz
Base Clock
1019 MHz
2250 MHz
Boost Clock
1071 MHz
2000 MHz
Memory Clock
1500 MHz

Memory

16GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
128bit
512.0GB/s
Bandwidth
96.00GB/s

Render Config

80
Compute Units
10
-
-
-
5120
Shading Units
640
320
TMUs
40
128
ROPs
16
-
-
-
80
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
4 MB
L2 Cache
1024 KB
128 MB
L3 Cache
-

Theoretical Performance

288.0 GPixel/s
Pixel Rate
17.14 GPixel/s
720.0 GTexel/s
Texture Rate
42.84 GTexel/s
46.08 TFLOPS
FP16 (half)
1371 GFLOPS
23.04 TFLOPS
FP32 (float)
1371 GFLOPS
1440 GFLOPS
FP64 (double)
85.68 GFLOPS

Board Design

300W
TDP
60W
700 W
Suggested PSU
250 W
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
Outputs
1x DVI 1x HDMI 2.0b 1x DisplayPort 1.4a
2x 8-pin
Power Connectors
None

Graphics Processor

Navi 21
GPU Name
Baffin
Navi 21 XTX (215-121000167)
GPU Variant
Baffin LE
RDNA 2.0
Architecture
GCN 4.0
TSMC
Foundry
GlobalFoundries
7 nm
Process Size
14 nm
26.8 billion
Transistors
3 billion
520 mm²
Die Size
123 mm²

Graphics Features

12 Ultimate (12_2)
DirectX
12 (12_0)
4.6
OpenGL
4.6
2.1
OpenCL
2.1
1.3
Vulkan
1.2
-
-
-
6.5
Shader Model
6.4

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