AMD Radeon R9 390X vs ATI Radeon HD 3850 X2

VS

AMD Radeon R9 390X

ATI Radeon HD 3850 X2

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 512MB VRAM Radeon HD 3850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390X 's Advantages

Released 7 years and 2 months late

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (384.0GB/s vs 52.99GB/s)

2496 additional rendering cores

ATI Radeon HD 3850 X2 's Advantages

Lower TDP (140W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390X +1281%

5.914 TFLOPS

Radeon HD 3850 X2

0.428 TFLOPS

Radeon R9 390X

VS

Radeon HD 3850 X2

Graphics Card

Jun 2015

Release Date

Apr 2008

Pirate Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1500 MHz

Memory Clock

828 MHz

Memory

8GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

52.99GB/s

Render Config

44

Compute Units

4

-

2816

Shading Units

320

176

TMUs

16

64

ROPs

16

-

16 KB (per CU)

L1 Cache

-

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

67.20 GPixel/s

Pixel Rate

10.70 GPixel/s

184.8 GTexel/s

Texture Rate

10.70 GTexel/s

-

5.914 TFLOPS

FP32 (float)

428.2 GFLOPS

739.2 GFLOPS

FP64 (double)

85.63 GFLOPS

Board Design

275W

TDP

140W

600 W

Suggested PSU

300 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

2x DVI 1x S-Video

1x 6-pin + 1x 8-pin

Power Connectors

-

Graphics Processor

Grenada

GPU Name

RV670

Grenada XT (215-0880004)

GPU Variant

RV670 PRO (215-0708003)

GCN 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

6.2 billion

Transistors

0.666 billion

438 mm²

Die Size

192 mm²

Graphics Features

12 (12_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.0

OpenCL

N/A

1.2

Vulkan

N/A

-

6.3

Shader Model

4.1

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