Home GPU Comparison AMD Radeon HD 7970 vs NVIDIA GeForce 8400 SE

AMD Radeon HD 7970 vs NVIDIA GeForce 8400 SE

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 and 128MB VRAM GeForce 8400 SE to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 's Advantages
Released 3 years and 4 months late
More VRAM (3GB vs 128GB)
Larger VRAM bandwidth (264.0GB/s vs 6.400GB/s)
2032 additional rendering cores
NVIDIA GeForce 8400 SE 's Advantages
Lower TDP (50W vs 250W)

Score

Benchmark

FP32 (float)
Radeon HD 7970 +12965%
3.789 TFLOPS
GeForce 8400 SE
0.029 TFLOPS
VS

Graphics Card

Dec 2011
Release Date
Aug 2008
Southern Islands
Generation
GeForce 8
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 1.0 x16

Clock Speeds

-
-
-
-
-
-
1375 MHz
Memory Clock
400 MHz

Memory

3GB
Memory Size
128MB
GDDR5
Memory Type
DDR2
384bit
Memory Bus
64bit
264.0GB/s
Bandwidth
6.400GB/s

Render Config

32
Compute Units
-
-
SM Count
2
2048
Shading Units
16
128
TMUs
8
32
ROPs
4
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
-
768 KB
L2 Cache
16 KB
-
-
-

Theoretical Performance

29.60 GPixel/s
Pixel Rate
1.836 GPixel/s
118.4 GTexel/s
Texture Rate
3.672 GTexel/s
-
-
-
3.789 TFLOPS
FP32 (float)
29.38 GFLOPS
947.2 GFLOPS
FP64 (double)
-

Board Design

250W
TDP
50W
600 W
Suggested PSU
250 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
1x DVI 1x VGA 1x S-Video
1x 6-pin + 1x 8-pin
Power Connectors
None

Graphics Processor

Tahiti
GPU Name
G86S
Tahiti XT (215-0821060)
GPU Variant
-
GCN 1.0
Architecture
Tesla
TSMC
Foundry
TSMC
28 nm
Process Size
80 nm
4.313 billion
Transistors
0.21 billion
352 mm²
Die Size
127 mm²

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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