AMD Radeon RX 6900 XTX vs AMD Radeon R9 255 OEM

VS

AMD Radeon RX 6900 XTX

AMD Radeon R9 255 OEM

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

Boost Clock has increased by 162% (2435MHz 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 330W)

Score

Benchmark

FP32 (float)

Radeon RX 6900 XTX +2518%

24.93 TFLOPS

Radeon R9 255 OEM

0.952 TFLOPS

Radeon RX 6900 XTX

VS

Radeon R9 255 OEM

Graphics Card

Unknown

Release Date

Dec 2013

Navi II

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2075 MHz

Base Clock

900 MHz

2435 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

80

Compute Units

8

-

5120

Shading Units

512

320

TMUs

32

128

ROPs

16

-

80

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

256 KB

128 MB

L3 Cache

-

Theoretical Performance

311.7 GPixel/s

Pixel Rate

14.88 GPixel/s

779.2 GTexel/s

Texture Rate

29.76 GTexel/s

49.87 TFLOPS

FP16 (half)

-

24.93 TFLOPS

FP32 (float)

952.3 GFLOPS

1.558 TFLOPS

FP64 (double)

59.52 GFLOPS

Board Design

330W

TDP

65W

700 W

Suggested PSU

250 W

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

Outputs

No outputs

2x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Navi 21

GPU Name

Cape Verde

Navi 21 XTXH (215-121000247)

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

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

Related GPU Comparisons

1

AMD Radeon RX 6900 XTX vs NVIDIA GeForce 9600 GT Mac Edition

2

AMD Radeon RX 6900 XTX vs AMD Radeon Pro 5700 XT

3

AMD Radeon RX 6900 XTX vs NVIDIA GeForce GTX 950 Low Power

4

AMD Radeon RX 6900 XTX vs ATI Radeon HD 5870 Eyefinity 6

5

AMD Radeon RX 6900 XTX vs AMD Radeon RX 580 2048SP

6

AMD Radeon RX 6900 XTX vs AMD Radeon HD 7950

7

AMD Radeon RX 6900 XTX vs ATI Radeon HD 2600 XT

8

AMD Radeon RX 6900 XTX vs MTT S70

9

AMD Radeon RX 6900 XTX vs NVIDIA GeForce 8400 GS PCI

10

AMD Radeon RX 6900 XTX vs NVIDIA CMP 90HX

Related News

1

NVIDIA Allegedly Equips RTX 5080 with 30Gbps Memory Speed, Other Models to Feature 28Gbps

2

Intel Reports High Return Rates for Devices Featuring Snapdragon X Series; Qualcomm Counters with 'Industry Standard' Claim

3

Intel Confirms Panther Lake Adopts 18A Process, ES0 Samples Already Sent to Customers

4

Complete Lineup of Core Ultra 200HX/H/U and Core 200H/U Revealed: 31 Models to Dazzle the Eyes

5

Amechi Unveils V1 Mini PC: Only 0.33L Volume with 150W Power Consumption

6

iPhone 17 Series Set for Major Design Overhaul: Camera Module Transformed into Sleek Strip

7

The Thinnest iPhone Ever! iPhone 17 Air Reportedly Enters Foxconn's NPI Stage

8

Apple Allegedly Cancels M4 Extreme, Originally Planned for Mac Pro with 64-Core CPU and 160-Core GPU

9

Cyberpunk 2077 Update 2.2: Intel Arrow Lake Gaming Performance Soars by 33%!

10

Intel Finally Achieves Frame Generation! 'F1 24' Becomes the First XeSS 2 Game