AMD Radeon HD 7720 OEM vs ATI Radeon HD 3870 AGP

VS

AMD Radeon HD 7720 OEM

ATI Radeon HD 3870 AGP

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 7720 OEM and 512MB VRAM Radeon HD 3870 AGP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7720 OEM 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 72.06GB/s)

480 additional rendering cores

ATI Radeon HD 3870 AGP 's Advantages

Lower TDP (106W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 7720 OEM +170%

1.344 TFLOPS

Radeon HD 3870 AGP

0.497 TFLOPS

Radeon HD 7720 OEM

VS

Radeon HD 3870 AGP

Graphics Card

Mar 2013

Release Date

Unknown

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

AGP 8x

Clock Speeds

-

1050 MHz

Memory Clock

1126 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR4

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

72.06GB/s

Render Config

10

Compute Units

4

-

800

Shading Units

320

40

TMUs

16

32

ROPs

16

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

-

Theoretical Performance

26.88 GPixel/s

Pixel Rate

12.43 GPixel/s

33.60 GTexel/s

Texture Rate

12.43 GTexel/s

-

1344 GFLOPS

FP32 (float)

497.3 GFLOPS

-

FP64 (double)

99.46 GFLOPS

Board Design

150W

TDP

106W

450 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x S-Video

-

Power Connectors

1x 8-pin

Graphics Processor

Barts

GPU Name

RV670

Barts LE (215-0798002)

GPU Variant

RV670 XT (215-0708005)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.666 billion

255 mm²

Die Size

192 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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