Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce 8400 GS GeForce 6600 GT
Cyberpunk 2077 4420% 4709%
Assassins Creed: Valhalla 4034% 4298%
Call of Duty: Black Ops Cold War 3900% 4155%
Watch Dogs Legion 4260% 4538%
Godfall 7240% 7709%
FIFA 21 2180% 2326%
Microsoft Flight Simulator 3900% 4155%
Grand Theft Auto VI 6260% 6666%
World of Warcraft: Shadowlands 6380% 6794%
Genshin Impact 4420% 4709%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 8400 GS are very slightly better than the Nvidia GeForce 6600 GT.

The GeForce 8400 GS was released over a year more recently than the GeForce 6600 GT, and so the GeForce 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 GeForce 8400 GS has 128 MB more video memory than the GeForce 6600 GT, so is likely to be slightly better at displaying game textures at higher resolutions. However, overall, the GeForce 6600 GT has superior memory performance.

The GeForce 6600 GT has 8.8 GB/sec greater memory bandwidth than the GeForce 8400 GS, which means that the memory performance of the GeForce 6600 GT is marginally better than the GeForce 8400 GS.

The GeForce 8400 GS has 16 Shader Processing Units and the GeForce 6600 GT has 11. However, the actual shader performance of the GeForce 8400 GS is 18 and the actual shader performance of the GeForce 6600 GT is 6. The GeForce 8400 GS having 12 better shader performance is not particularly notable, as altogether the GeForce 6600 GT performs better when taking into account other relevant data.

The GeForce 8400 GS requires 18 Watts to run and the GeForce 6600 GT requires 48 Watts. We would recommend a PSU with at least 300 Watts for the GeForce 8400 GS. The GeForce 6600 GT requires 30 Watts more than the GeForce 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 GeForce 8400 GS.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed450 MHzvs500 MHz
Boost Clock-vs-
ArchitectureTesla G86NV43
OC Potential Fair vs -
Driver Support Poor vs -
Release Date17 Apr 2007vs01 Nov 2004
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
1.8
green tick vs -
1920x1080
1.2
green tick vs -
2560x1440
0.7
green tick vs -
3840x2160
0.4
green tick vs -

GPU Memory

Memory256 MBvs128 MB
Memory Speed400 MHzvs475 MHz
Memory Bus64 Bitvs128 Bit
Memory TypeDDR2vsGDDR3
Memory Bandwidth6.4GB/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%
Comparison

GPU Display

Shader Processing Units16vs11
Actual Shader Performance1%vs0%
Technology80nmvs-
Texture Mapping Units8vs-
Texture Rate3.6 GTexel/svs-
Render Output Units4vs-
Pixel Rate1.8 GPixel/svs-
Comparison

GPU Outputs

Max Digital Resolution (WxH)2048x1536vs2560x1600
VGA Connections1vs1
DVI Connections1vs1
HDMI Connections1vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power18 Wattsvs48 Watts
Recommended PSU300 Watts & 20 Amps-

GPU Features

DirectX10.0vs9.0c
Shader Model4.0vs3.0
Open GL3.3vs1.5
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Celeron 440 2.0GHz-
Recommended RAM2 GB-
Maximum Recommended Gaming Resolution800x600-

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewGeForce 8400 GS is an entry-level GFX based on the 80nm variant of the first-shader unified architecture.
It's based on the G86 Core and offers 16 Shader Processing Units, 8 TMUs and 4 ROPs, on a 64-bit memory interface of DDR2. The central unit runs at 450MHz and the memory clock operates at 400MHz. It will consume no more than 40 Watt.
It's therefore a GeForce 8500 GT, slightly lower power consumption and no SLI support.
This GPU is only suited for a 1024x768 (or less) resolution. Most of today's games will only run at low settings and extremely demanding games might not run at all. DirectX 11 based games aren't supported and its performance will decrease drastically, as the resolution increases.
Note: This GPU had two revisions which added HDMI support, DDR3 memory and different core configurations.
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
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Possible GPU Upgrades
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GPU Variants
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