ATI Radeon HD 2900 XTX vs AMD Radeon RX 455 OEM

VS

ATI Radeon HD 2900 XTX AMD Radeon RX 455 OEM

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XTX and 2GB VRAM Radeon RX 455 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 2900 XTX 's Advantages

Larger VRAM bandwidth (106.0GB/s vs 104.0GB/s)

AMD Radeon RX 455 OEM 's Advantages

448 additional rendering cores

Lower TDP (100W vs 240W)

Score

Benchmark

FP32 (float)

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon RX 455 OEM +238%

1.613 TFLOPS

Radeon HD 2900 XTX

VS

Radeon RX 455 OEM

Graphics Card

Unknown

Release Date

Jun 2016

Radeon R600

Generation

Arctic Islands

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

828 MHz

Memory Clock

1625 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

512bit

Memory Bus

128bit

106.0GB/s

Bandwidth

104.0GB/s

Render Config

-

SM Count

-

4

Compute Units

12

320

Shading Units

768

16

TMUs

48

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

Theoretical Performance

11.89 GPixel/s

Pixel Rate

16.80 GPixel/s

11.89 GTexel/s

Texture Rate

50.40 GTexel/s

-

FP16 (half)

-

475.5 GFLOPS

FP32 (float)

1.613 TFLOPS

-

FP64 (double)

100.8 GFLOPS

Graphics Processor

R600

GPU Name

Tobago

R600 XTX A11 (215RGMDKA11FG)

GPU Variant

Tobago PRO (215-0875010)

TeraScale

Architecture

GCN 2.0

TSMC

Foundry

TSMC

80 nm

Process Size

28 nm

0.72 billion

Transistors

2.08 billion

420 mm²

Die Size

160 mm²

Board Design

240W

TDP

100W

550 W

Suggested PSU

300 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

2x 6-pin

Power Connectors

1x 6-pin

Graphics Features

10.0 (10_0)

DirectX

12 (12_0)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

2.0

N/A

Vulkan

1.2

-

CUDA

-

4.0

Shader Model

6.3

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