Home GPU Comparison AMD Radeon HD 6990 vs NVIDIA GeForce 8400 SE

AMD Radeon HD 6990 vs NVIDIA GeForce 8400 SE

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 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 6990 's Advantages
Released 2 years and 7 months late
More VRAM (2GB vs 128GB)
Larger VRAM bandwidth (160.0GB/s vs 6.400GB/s)
1520 additional rendering cores
NVIDIA GeForce 8400 SE 's Advantages
Lower TDP (50W vs 375W)

Score

Benchmark

FP32 (float)
Radeon HD 6990 +8693%
2.55 TFLOPS
GeForce 8400 SE
0.029 TFLOPS
VS

Graphics Card

Mar 2011
Release Date
Aug 2008
Northern Islands
Generation
GeForce 8
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 1.0 x16

Clock Speeds

-
-
-
-
-
-
1250 MHz
Memory Clock
400 MHz

Memory

2GB
Memory Size
128MB
GDDR5
Memory Type
DDR2
256bit
Memory Bus
64bit
160.0GB/s
Bandwidth
6.400GB/s

Render Config

24
Compute Units
-
-
SM Count
2
1536
Shading Units
16
96
TMUs
8
32
ROPs
4
-
-
-
-
-
-
8 KB (per CU)
L1 Cache
-
512 KB
L2 Cache
16 KB
-
-
-

Theoretical Performance

26.56 GPixel/s
Pixel Rate
1.836 GPixel/s
79.68 GTexel/s
Texture Rate
3.672 GTexel/s
-
-
-
2.550 TFLOPS
FP32 (float)
29.38 GFLOPS
637.4 GFLOPS
FP64 (double)
-

Board Design

375W
TDP
50W
750 W
Suggested PSU
250 W
1x DVI 4x mini-DisplayPort 1.2
Outputs
1x DVI 1x VGA 1x S-Video
2x 8-pin
Power Connectors
None

Graphics Processor

Antilles
GPU Name
G86S
Antilles XT (215-0807027)
GPU Variant
-
TeraScale 3
Architecture
Tesla
TSMC
Foundry
TSMC
40 nm
Process Size
80 nm
2.64 billion
Transistors
0.21 billion
389 mm²
Die Size
127 mm²

Graphics Features

11.2 (11_0)
DirectX
11.1 (10_0)
4.4
OpenGL
3.3
1.2
OpenCL
1.1
N/A
Vulkan
N/A
-
CUDA
1.1
5.0
Shader Model
4.0

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