AMD Radeon HD 6750 vs AMD Radeon HD 7990

VS

AMD Radeon HD 6750

AMD Radeon HD 7990

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6750 and 3GB VRAM Radeon HD 7990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6750 's Advantages

Lower TDP (86W vs 375W)

AMD Radeon HD 7990 's Advantages

Released 2 years and 3 months late

Boost Clock1000MHz

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (288.0GB/s vs 73.60GB/s)

1328 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6750

1.008 TFLOPS

Radeon HD 7990 +306%

4.096 TFLOPS

Radeon HD 6750

VS

Radeon HD 7990

Graphics Card

Jan 2011

Release Date

Apr 2013

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

950 MHz

-

Boost Clock

1000 MHz

1150 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

384bit

73.60GB/s

Bandwidth

288.0GB/s

Render Config

9

Compute Units

32

-

720

Shading Units

2048

36

TMUs

128

16

ROPs

32

-

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

-

1008 GFLOPS

FP32 (float)

4.096 TFLOPS

-

FP64 (double)

1024 GFLOPS

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

1x 6-pin

Power Connectors

2x 8-pin

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

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

-

5.0

Shader Model

5.1

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