AMD Radeon HD 7870 XT vs ATI Radeon HD 4850

VS

AMD Radeon HD 7870 XT

ATI Radeon HD 4850

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

Main Differences

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

ATI Radeon HD 4850 's Advantages

Lower TDP (110W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +199%

2.995 TFLOPS

Radeon HD 4850

1 TFLOPS

Radeon HD 7870 XT

VS

Radeon HD 4850

Graphics Card

Nov 2012

Release Date

Jun 2008

Southern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

925 MHz

Base Clock

-

975 MHz

Boost Clock

-

1500 MHz

Memory Clock

993 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

192.0GB/s

Bandwidth

63.55GB/s

Render Config

24

Compute Units

10

-

1536

Shading Units

800

96

TMUs

40

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

10.00 GPixel/s

93.60 GTexel/s

Texture Rate

25.00 GTexel/s

-

2.995 TFLOPS

FP32 (float)

1000 GFLOPS

748.8 GFLOPS

FP64 (double)

200.0 GFLOPS

Board Design

185W

TDP

110W

450 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

Tahiti

GPU Name

RV770

Tahiti LE (215-0821122)

GPU Variant

RV770 PRO (215-0669065)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.956 billion

352 mm²

Die Size

256 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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