AMD Radeon R9 390 vs ATI Radeon HD 3850 X3

VS

AMD Radeon R9 390

ATI Radeon HD 3850 X3

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 and 512MB VRAM Radeon HD 3850 X3 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390 's Advantages

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (384.0GB/s vs 54.40GB/s)

2240 additional rendering cores

ATI Radeon HD 3850 X3 's Advantages

Lower TDP (145W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390 +1096%

5.12 TFLOPS

Radeon HD 3850 X3

0.428 TFLOPS

Radeon R9 390

VS

Radeon HD 3850 X3

Graphics Card

Jun 2015

Release Date

Unknown

Pirate Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1500 MHz

Memory Clock

850 MHz

Memory

8GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

54.40GB/s

Render Config

40

Compute Units

4

-

2560

Shading Units

320

160

TMUs

16

64

ROPs

16

-

16 KB (per CU)

L1 Cache

-

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

64.00 GPixel/s

Pixel Rate

10.70 GPixel/s

160.0 GTexel/s

Texture Rate

10.70 GTexel/s

-

5.120 TFLOPS

FP32 (float)

428.2 GFLOPS

640.0 GFLOPS

FP64 (double)

-

Board Design

275W

TDP

145W

600 W

Suggested PSU

300 W

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

Outputs

4x DVI

1x 6-pin + 1x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

Grenada

GPU Name

RV670

Grenada PRO (215-0880030)

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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