AMD Radeon HD 7870 XT vs NVIDIA GeForce 8400

VS

AMD Radeon HD 7870 XT NVIDIA GeForce 8400

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 256MB VRAM GeForce 8400 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 11 months late

Boost Clock975MHz

Larger VRAM bandwidth (192.0GB/s vs 8.000GB/s)

1528 additional rendering cores

NVIDIA GeForce 8400 's Advantages

Lower TDP (25W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +14161%

2.995 TFLOPS

GeForce 8400

0.021 TFLOPS

Radeon HD 7870 XT

VS

GeForce 8400

Graphics Card

Nov 2012

Release Date

Dec 2007

Southern Islands

Generation

GeForce 8

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

500 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

64bit

192.0GB/s

Bandwidth

8.000GB/s

Render Config

-

SM Count

1

24

Compute Units

-

1536

Shading Units

8

96

TMUs

4

32

ROPs

4

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

16 KB

Theoretical Performance

31.20 GPixel/s

Pixel Rate

2.160 GPixel/s

93.60 GTexel/s

Texture Rate

2.160 GTexel/s

-

FP16 (half)

-

2.995 TFLOPS

FP32 (float)

20.80 GFLOPS

748.8 GFLOPS

FP64 (double)

-

Graphics Processor

Tahiti

GPU Name

G98

Tahiti LE (215-0821122)

GPU Variant

-

GCN 1.0

Architecture

Tesla

TSMC

Foundry

TSMC

28 nm

Process Size

65 nm

4.313 billion

Transistors

0.21 billion

352 mm²

Die Size

86 mm²

Board Design

185W

TDP

25W

450 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x VGA 1x S-Video

2x 6-pin

Power Connectors

None

Graphics Features

12 (11_1)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

1.1

5.1

Shader Model

4.0

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