AMD Radeon RX 6900 XTX vs AMD Radeon Sky 900

VS

AMD Radeon RX 6900 XTX

AMD Radeon Sky 900

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX 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 XTX 's Advantages

Boost Clock has increased by 156% (2435MHz vs 950MHz)

More VRAM (16GB vs 3GB)

Larger VRAM bandwidth (576.0GB/s vs 240.0GB/s)

3328 additional rendering cores

AMD Radeon Sky 900 's Advantages

Lower TDP (300W vs 330W)

Score

Benchmark

FP32 (float)

Radeon RX 6900 XTX +632%

24.93 TFLOPS

Radeon Sky 900

3.405 TFLOPS

Radeon RX 6900 XTX

VS

Radeon Sky 900

Graphics Card

Unknown

Release Date

Mar 2013

Navi II

Generation

Radeon Sky

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2075 MHz

Base Clock

825 MHz

2435 MHz

Boost Clock

950 MHz

2250 MHz

Memory Clock

1250 MHz

Memory

16GB

Memory Size

3GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

384bit

576.0GB/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

311.7 GPixel/s

Pixel Rate

30.40 GPixel/s

779.2 GTexel/s

Texture Rate

106.4 GTexel/s

49.87 TFLOPS

FP16 (half)

-

24.93 TFLOPS

FP32 (float)

3.405 TFLOPS

1.558 TFLOPS

FP64 (double)

851.2 GFLOPS

Board Design

330W

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 XTXH (215-121000247)

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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