ATI Radeon HD 4850 vs AMD Radeon HD 7870 XT

VS

ATI Radeon HD 4850

AMD Radeon HD 7870 XT

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4850 and 2GB VRAM Radeon HD 7870 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4850 's Advantages

Lower TDP (110W vs 185W)

AMD Radeon HD 7870 XT 's Advantages

Released 4 years and 5 months late

Boost Clock975MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (192.0GB/s vs 63.55GB/s)

736 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4850

1 TFLOPS

Radeon HD 7870 XT +199%

2.995 TFLOPS

Radeon HD 4850

VS

Radeon HD 7870 XT

Graphics Card

Jun 2008

Release Date

Nov 2012

Radeon R700

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

925 MHz

-

Boost Clock

975 MHz

993 MHz

Memory Clock

1500 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

256bit

63.55GB/s

Bandwidth

192.0GB/s

Render Config

10

Compute Units

24

-

800

Shading Units

1536

40

TMUs

96

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

10.00 GPixel/s

Pixel Rate

31.20 GPixel/s

25.00 GTexel/s

Texture Rate

93.60 GTexel/s

-

1000 GFLOPS

FP32 (float)

2.995 TFLOPS

200.0 GFLOPS

FP64 (double)

748.8 GFLOPS

Board Design

110W

TDP

185W

300 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

RV770

GPU Name

Tahiti

RV770 PRO (215-0669065)

GPU Variant

Tahiti LE (215-0821122)

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.956 billion

Transistors

4.313 billion

256 mm²

Die Size

352 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_1)

3.3

OpenGL

4.6

1.1

OpenCL

1.2

N/A

Vulkan

1.2

-

4.1

Shader Model

5.1

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