Home GPU Comparison AMD Radeon RX 6900 XT vs AMD Radeon Sky 900

AMD Radeon RX 6900 XT vs AMD Radeon Sky 900

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XT and 3GB VRAM Radeon Sky 900 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 7 years and 7 months late
Boost Clock has increased by 137% (2250MHz vs 950MHz)
More VRAM (16GB vs 3GB)
Larger VRAM bandwidth (512.0GB/s vs 240.0GB/s)
3328 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon RX 6900 XT +576%
23.04 TFLOPS
Radeon Sky 900
3.405 TFLOPS
VS

Graphics Card

Oct 2020
Release Date
Mar 2013
Navi II
Generation
Radeon Sky
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

1825 MHz
Base Clock
825 MHz
2250 MHz
Boost Clock
950 MHz
2000 MHz
Memory Clock
1250 MHz

Memory

16GB
Memory Size
3GB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
384bit
512.0GB/s
Bandwidth
240.0GB/s

Render Config

80
Compute Units
28
-
-
-
5120
Shading Units
1792
320
TMUs
112
128
ROPs
32
-
-
-
80
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
4 MB
L2 Cache
768 KB
128 MB
L3 Cache
-

Theoretical Performance

288.0 GPixel/s
Pixel Rate
30.40 GPixel/s
720.0 GTexel/s
Texture Rate
106.4 GTexel/s
46.08 TFLOPS
FP16 (half)
-
23.04 TFLOPS
FP32 (float)
3.405 TFLOPS
1440 GFLOPS
FP64 (double)
851.2 GFLOPS

Board Design

300W
TDP
300W
700 W
Suggested PSU
700 W
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
Outputs
1x DVI 1x mini-DisplayPort 1.2
2x 8-pin
Power Connectors
2x 8-pin

Graphics Processor

Navi 21
GPU Name
Tahiti
Navi 21 XTX (215-121000167)
GPU Variant
Orthrus
RDNA 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
26.8 billion
Transistors
4.313 billion
520 mm²
Die Size
352 mm²

Graphics Features

12 Ultimate (12_2)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.1
OpenCL
1.2
1.3
Vulkan
1.2
-
-
-
6.5
Shader Model
5.1

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