ATI Radeon HD 3850 X3 vs AMD Radeon R9 255 OEM

VS

ATI Radeon HD 3850 X3

AMD Radeon R9 255 OEM

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3850 X3 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 R9 255 OEM 's Advantages

Boost Clock930MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (73.60GB/s vs 54.40GB/s)

192 additional rendering cores

Lower TDP (65W vs 145W)

Score

Benchmark

FP32 (float)

Radeon HD 3850 X3

0.428 TFLOPS

Radeon R9 255 OEM +122%

0.952 TFLOPS

Radeon HD 3850 X3

VS

Radeon R9 255 OEM

Graphics Card

Unknown

Release Date

Dec 2013

Radeon R600

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

900 MHz

-

Boost Clock

930 MHz

850 MHz

Memory Clock

1150 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

128bit

54.40GB/s

Bandwidth

73.60GB/s

Render Config

4

Compute Units

8

-

320

Shading Units

512

16

TMUs

32

16

ROPs

16

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

10.70 GPixel/s

Pixel Rate

14.88 GPixel/s

10.70 GTexel/s

Texture Rate

29.76 GTexel/s

-

428.2 GFLOPS

FP32 (float)

952.3 GFLOPS

-

FP64 (double)

59.52 GFLOPS

Board Design

145W

TDP

65W

300 W

Suggested PSU

250 W

4x DVI

Outputs

No outputs

1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

RV670

GPU Name

Cape Verde

RV670 PRO (215-0708003)

GPU Variant

Cape Verde PRX

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

1.5 billion

192 mm²

Die Size

123 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_1)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

1.2

N/A

Vulkan

1.2

-

4.1

Shader Model

5.1

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