NVIDIA GeForce 8400 GS Rev. 3 vs AMD Radeon HD 7870 XT

VS

NVIDIA GeForce 8400 GS Rev. 3

AMD Radeon HD 7870 XT

We compared two Desktop platform GPUs: 512MB VRAM GeForce 8400 GS Rev. 3 and 2GB VRAM Radeon HD 7870 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 8400 GS Rev. 3 's Advantages

Lower TDP (25W vs 185W)

AMD Radeon HD 7870 XT 's Advantages

Released 2 years and 4 months late

Boost Clock975MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (192.0GB/s vs 6.400GB/s)

1528 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 8400 GS Rev. 3

0.02 TFLOPS

Radeon HD 7870 XT +14875%

2.995 TFLOPS

GeForce 8400 GS Rev. 3

VS

Radeon HD 7870 XT

Graphics Card

Jul 2010

Release Date

Nov 2012

GeForce 8

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

400 MHz

Memory Clock

1500 MHz

Memory

512MB

Memory Size

2GB

DDR2

Memory Type

GDDR5

64bit

Memory Bus

256bit

6.400GB/s

Bandwidth

192.0GB/s

Render Config

-

Compute Units

24

1

SM Count

-

8

Shading Units

1536

4

TMUs

96

4

ROPs

32

-

L1 Cache

16 KB (per CU)

32 KB

L2 Cache

512 KB

-

Theoretical Performance

2.080 GPixel/s

Pixel Rate

31.20 GPixel/s

2.080 GTexel/s

Texture Rate

93.60 GTexel/s

-

19.68 GFLOPS

FP32 (float)

2.995 TFLOPS

-

FP64 (double)

748.8 GFLOPS

Board Design

25W

TDP

185W

200 W

Suggested PSU

450 W

1x DVI 1x VGA 1x S-Video

Outputs

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

None

Power Connectors

2x 6-pin

Graphics Processor

GT218

GPU Name

Tahiti

8400GS-225-B1

GPU Variant

Tahiti LE (215-0821122)

Tesla 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.26 billion

Transistors

4.313 billion

57 mm²

Die Size

352 mm²

Graphics Features

11.1 (10_1)

DirectX

12 (11_1)

3.3

OpenGL

4.6

1.1

OpenCL

1.2

N/A

Vulkan

1.2

CUDA

-

4.1

Shader Model

5.1

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