AMD Radeon RX 6950 XT vs AMD Radeon R9 255 OEM

VS

AMD Radeon RX 6950 XT AMD Radeon R9 255 OEM

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6950 XT and 2GB VRAM Radeon R9 255 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6950 XT 's Advantages

Released 8 years and 5 months late

Boost Clock has increased by 148% (2310MHz vs 930MHz)

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (576.0GB/s vs 73.60GB/s)

4608 additional rendering cores

AMD Radeon R9 255 OEM 's Advantages

Lower TDP (65W vs 335W)

Score

Benchmark

FP32 (float)

Radeon RX 6950 XT +2384%

23.65 TFLOPS

Radeon R9 255 OEM

0.952 TFLOPS

Radeon RX 6950 XT

VS

Radeon R9 255 OEM

Graphics Card

May 2022

Release Date

Dec 2013

Navi II

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1860 MHz

Base Clock

900 MHz

2310 MHz

Boost Clock

930 MHz

2250 MHz

Memory Clock

1150 MHz

Memory

16GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

576.0GB/s

Bandwidth

73.60GB/s

Render Config

-

SM Count

-

80

Compute Units

8

5120

Shading Units

512

320

TMUs

32

128

ROPs

16

-

Tensor Cores

-

80

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

256 KB

Theoretical Performance

295.7 GPixel/s

Pixel Rate

14.88 GPixel/s

739.2 GTexel/s

Texture Rate

29.76 GTexel/s

47.31 TFLOPS

FP16 (half)

-

23.65 TFLOPS

FP32 (float)

952.3 GFLOPS

1478 GFLOPS

FP64 (double)

59.52 GFLOPS

Graphics Processor

Navi 21

GPU Name

Cape Verde

Navi 21 KXTX (215-121000289)

GPU Variant

Cape Verde PRX

RDNA 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

26.8 billion

Transistors

1.5 billion

520 mm²

Die Size

123 mm²

Board Design

335W

TDP

65W

700 W

Suggested PSU

250 W

1x HDMI 2.1 2x DisplayPort 1.4a

Outputs

No outputs

2x 8-pin

Power Connectors

1x 6-pin

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

-

CUDA

-

6.5

Shader Model

5.1

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