AMD Radeon HD 8770 OEM vs AMD Radeon R9 390

VS

AMD Radeon HD 8770 OEM

AMD Radeon R9 390

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 8770 OEM and 8GB VRAM Radeon R9 390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8770 OEM 's Advantages

Lower TDP (85W vs 275W)

AMD Radeon R9 390 's Advantages

Released 1 years and 9 months late

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (384.0GB/s vs 96.00GB/s)

1664 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8770 OEM

1.882 TFLOPS

Radeon R9 390 +172%

5.12 TFLOPS

Radeon HD 8770 OEM

VS

Radeon R9 390

Graphics Card

Sep 2013

Release Date

Jun 2015

Sea Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1500 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

512bit

96.00GB/s

Bandwidth

384.0GB/s

Render Config

14

Compute Units

40

-

896

Shading Units

2560

56

TMUs

160

16

ROPs

64

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

16.80 GPixel/s

Pixel Rate

64.00 GPixel/s

58.80 GTexel/s

Texture Rate

160.0 GTexel/s

-

1.882 TFLOPS

FP32 (float)

5.120 TFLOPS

117.6 GFLOPS

FP64 (double)

640.0 GFLOPS

Board Design

85W

TDP

275W

250 W

Suggested PSU

600 W

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

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Bonaire

GPU Name

Grenada

Bonaire XT (215-0839039)

GPU Variant

Grenada PRO (215-0880030)

GCN 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.08 billion

Transistors

6.2 billion

160 mm²

Die Size

438 mm²

Graphics Features

12 (12_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.0

OpenCL

2.0

1.2

Vulkan

1.2

-

6.3

Shader Model

6.3

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