AMD Radeon HD 6770 Green Edition vs AMD Radeon HD 8990 OEM

VS

AMD Radeon HD 6770 Green Edition AMD Radeon HD 8990 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6770 Green Edition and 3GB VRAM Radeon HD 8990 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6770 Green Edition 's Advantages

Lower TDP (86W vs 375W)

AMD Radeon HD 8990 OEM 's Advantages

Boost Clock1000MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 21.34GB/s)

1328 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6770 Green Edition

1.008 TFLOPS

Radeon HD 8990 OEM +306%

4.096 TFLOPS

Radeon HD 6770 Green Edition

VS

Radeon HD 8990 OEM

Graphics Card

Apr 2013

Release Date

Apr 2013

Northern Islands

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

950 MHz

-

Boost Clock

1000 MHz

667 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

3GB

GDDR3

Memory Type

GDDR5

128bit

Memory Bus

384bit

21.34GB/s

Bandwidth

288.0GB/s

Render Config

-

SM Count

-

9

Compute Units

32

720

Shading Units

2048

36

TMUs

128

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

Theoretical Performance

11.20 GPixel/s

Pixel Rate

32.00 GPixel/s

25.20 GTexel/s

Texture Rate

128.0 GTexel/s

-

FP16 (half)

-

1008 GFLOPS

FP32 (float)

4.096 TFLOPS

-

FP64 (double)

1024 GFLOPS

Graphics Processor

Juniper

GPU Name

Malta

Juniper LE (215-0754009)

GPU Variant

Malta XT (215-0849026)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.04 billion

Transistors

4.313 billion

166 mm²

Die Size

365 mm²

Board Design

86W

TDP

375W

250 W

Suggested PSU

750 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

1x DVI 4x mini-DisplayPort 1.2

-

Power Connectors

2x 8-pin

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

CUDA

-

5.0

Shader Model

5.1

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