Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game GeForce 8400 GS Rev. 4 EVGA 1GB Edition GeForce 6600 GT
Cyberpunk 2077 3273% 4709%
Assassins Creed: Valhalla 2985% 4298%
Call of Duty: Black Ops Cold War 2885% 4155%
FIFA 21 1601% 2326%
Microsoft Flight Simulator 2885% 4155%
World of Warcraft: Shadowlands 4736% 6794%
Watch Dogs Legion 3154% 4538%
Horizon: Zero Dawn 3094% 4453%
Grand Theft Auto VI 4646% 6666%
Genshin Impact 3273% 4709%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 8400 GS Rev. 4 EVGA 1GB Edition are significantly better than the Nvidia GeForce 6600 GT.

The 8400 GS was released over a year more recently than the GeForce 6600 GT, and so the 8400 GS is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce 6600 GT.

Both GPUs exhibit very poor performance, so rather than upgrading from one to the other you should consider looking at more powerful GPUs. Neither of these will be able to run the latest games in any playable way.

The 8400 GS has 896 MB more video memory than the GeForce 6600 GT, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The GeForce 6600 GT has 5.6 GB/sec greater memory bandwidth than the 8400 GS, which means that the memory performance of the GeForce 6600 GT is marginally better than the 8400 GS.

The GeForce 8400 GS Rev. 4 EVGA 1GB Edition has 16 Shader Processing Units and the GeForce 6600 GT has 11. However, the actual shader performance of the 8400 GS is 19 and the actual shader performance of the GeForce 6600 GT is 6. The 8400 GS having 13 better shader performance and an altogether better performance when taking into account other relevant data means that the 8400 GS delivers a marginally smoother and more efficient experience when processing graphical data than the GeForce 6600 GT.

The GeForce 8400 GS Rev. 4 EVGA 1GB Edition requires 40 Watts to run and the GeForce 6600 GT requires 48 Watts. We would recommend a PSU with at least 350 Watts for the 8400 GS. The GeForce 6600 GT requires 8 Watts more than the 8400 GS to run. The difference is not significant enough for the GeForce 6600 GT to have a noticeably larger impact on your yearly electricity bills than the 8400 GS.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed520 MHzvs500 MHz
Boost Clock-vs-
ArchitectureTesla GT218NV43
OC Potential Poor vs -
Driver Support Poor vs -
Release Date17 Apr 2007vs01 Nov 2004
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - green tick vs green tick -
green tick vs -
green tick vs -
green tick vs -
green tick vs -

GPU Memory

Memory1024 MBvs128 MB
Memory Speed600 MHzvs475 MHz
Memory Bus64 Bitvs128 Bit
Memory TypeDDR3vsGDDR3
Memory Bandwidth9.6GB/secvs15.2GB/sec
L2 Cache 0 KB green tick vs -
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units16vs11
Actual Shader Performance1%vs0%
Texture Mapping Units8vs-
Texture Rate4.2 GTexel/svs-
Render Output Units4vs-
Pixel Rate2.1 GPixel/svs-

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs2560x1600
VGA Connections1vs1
DVI Connections1vs1
HDMI Connections1vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power40 Wattsvs48 Watts
Recommended PSU350 Watts & 18 Amps-

GPU Features

Shader Model4.1vs3.0
Open GL3.3vs1.5
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Celeron D 360-
Recommended RAM3 GB-
Maximum Recommended Gaming Resolution1024x768-

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce 8400 GS Rev. 4 EVGA 1GB Edition is a special edition of NVIDIA's Entry-Level GeForce 8400 GS Rev. 4 EVGA 1GB Edition, created by EVGA.

Overclock: Central Unit
The Central Unit still runs at 520MHz.

Overclock: Memory Clock
The Operating Memory Clock is now of 600MHz while the Frame Buffer was doubled to 1GB: a gimmick which doesn't yield any performance boost and can be considered market to lure consumers into paying more for the same product.

Cooling Solution
The Cooling System remains the same.

Benchmarks indicate a 3% performance over the reference GeForce 8400 GS Rev. 4.
Supercharge your gaming with the power of an NVIDIA GeForce 6600 GPU. The NVIDIA GeForce 6600 GPUs deliver best-in-class performance and advanced visual effects for next-generation games. The only GPU in its class with support for Microsoft DirectX 9.0 Shader Model 3.0 and with support for PCI Express, the GeForce 6600 delivers ultra-realistic effects, unmatched features, and rock-solid stability so you can play your game the way itís meant to be played.
Recommended CPU
Possible GPU Upgrades
GPU Variants