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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 620 GeForce 8600 GT
Halo: Reach 423% 386%
Cyberpunk 2077 2162% 2000%
Red Dead Redemption 2 1546% 1429%
Dragon Ball Z Kakarot 915% 843%
Call of Duty: Modern Warfare 1546% 1429%
Doom Eternal 1315% 1214%
Microsoft Flight Simulator 2162% 2000%
Grand Theft Auto VI 2415% 2236%
FIFA 20 777% 714%
Need For Speed Heat 1546% 1429%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 8600 GT are very slightly better than the Nvidia GeForce GT 620.

The GeForce GT 620 has a 160 MHz higher core clock speed and the same number of Texture Mapping Units as the GeForce 8600 GT. This results in the GeForce GT 620 providing 2.6 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce GT 620 has a 160 MHz higher core clock speed than the GeForce 8600 GT, but the GeForce 8600 GT has 4 more Render Output Units than the GeForce GT 620. As a result, the GeForce 8600 GT exhibits a 1.5 GPixel/s better Pixel Fill Rate than the GeForce GT 620. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce GT 620 was released over three years more recently than the GeForce 8600 GT, and so the GeForce GT 620 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce 8600 GT when running the latest games.

The GeForce GT 620 has 768 MB more video memory than the GeForce 8600 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 8600 GT has 8 GB/sec greater memory bandwidth than the GeForce GT 620, which means that the memory performance of the GeForce 8600 GT is marginally better than the GeForce GT 620.

The GeForce GT 620 has 96 Shader Processing Units and the GeForce 8600 GT has 32. However, the actual shader performance of the GeForce GT 620 is 134 and the actual shader performance of the GeForce 8600 GT is 43. The GeForce GT 620 having 91 better shader performance is not particularly notable, as altogether the GeForce 8600 GT performs better when taking into account other relevant data.

The GeForce GT 620 transistor size technology is 40 nm (nanometers) smaller than the GeForce 8600 GT. This means that the GeForce GT 620 is expected to run much cooler and achieve higher clock frequencies than the GeForce 8600 GT. While they exhibit similar graphical performance, the GeForce GT 620 should consume less power than the GeForce 8600 GT.

The GeForce GT 620 requires 49 Watts to run and the GeForce 8600 GT requires 47 Watts. We would recommend a PSU with at least 300 Watts for the GeForce GT 620 and a PSU with at least 350 Watts for the GeForce 8600 GT. The GeForce GT 620 requires 2 Watts more than the GeForce 8600 GT to run. The difference is not significant enough for the GeForce GT 620 to have a noticeably larger impact on your yearly electricity bills than the GeForce 8600 GT.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed700 MHzvs540 MHz
Boost Clock-vs-
ArchitectureFermi GF108-100-KB-A1Tesla G84
OC Potential Fair vs Fair
Driver Support Poor vs Poor
Release Date15 May 2012vs01 Apr 2007
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs -
vs green tick
vs green tick
green tick vs
3840x2160 - vs green tick

GPU Memory

Memory1024 MBvs256 MB
Memory Speed900 MHzvs700 MHz
Memory Bus64 Bitvs128 Bit
Memory TypeDDR3vsGDDR3
Memory Bandwidth14.4GB/secvs22.4GB/sec
L2 Cache 128 KB green tick vs 0 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units96vs32
Actual Shader Performance6%vs2%
Texture Mapping Units16vs16
Texture Rate11.2 GTexel/svs8.6 GTexel/s
Render Output Units4vs8
Pixel Rate2.8 GPixel/svs4.3 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs2560x1600
VGA Connections1vs0
DVI Connections1vs2
HDMI Connections1vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power49 Wattsvs47 Watts
Recommended PSU300 Watts & 22 Ampsvs350 Watts & 24 Amps

GPU Features

Shader Model5.0vs4.0
Open GL4.5vs3.3
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Celeron G550 2.6GHzvsIntel Core 2 Duo E6600 2.4GHz
Recommended RAM4 GBvs3 GB
Maximum Recommended Gaming Resolution1366x768vs1024x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GT 620 is an Entry-Level Graphics Card based on the first revision of the Fermi Architecture.

The Fermi Architecture is manufactured with a 40nm technology and uses a technique known as Hot Clocking: The Shaders are clocked twice as fast as the Central Unit. While this leads to a reasonable performance boost, it causes enormous amounts of energy dissipation, leading, ultimately, to a significantly higher operating temperature.
Fermi is also the first GPU architecture with fully cached memory access which increases memory performance.

It equips a GPU codenamed Fermi GF108-100-KB-A1 which has 2 Stream Multiprocessors activated and thus offers 96 Shader Processing Units, 16 TMUs and 4 ROPs. The Central Unit is clocked at 700MHz.

The GPU accesses a 1GB frame buffer of DDR3, through a 128-bit memory interface. The size of the frame buffer is exaggerated and in no way benefits the GPU. The Memory Clock Operates at 500MHz.

DirectX 11.0 Support (11.0 Hardware Default) and support for 3D Vision Surround, PhysX, Realtime Raytracing and other technologies.

Cooling Solution
The Cooling Solution consists of a Single-Fan.

Power Consumption
With a rated board TDP of 49W, it requires at least a 300W PSU and it relies entirely on the PCI Slot for power, meaning no extra connectors are required.

Gaming benchmarks put its performance is somewhat better than Radeon HD 7470.

System Suggestions
We recommend a modest processor (Intel Celeron) and 4GB of RAM for a system with GeForce GT 620.
GeForce 8600 GT is a middle-class GFX based on the 80nm variant of the first-shader unified architecture.
It's based on the G84 Core and offers 32 Shader Processing Units, 16 TMUs and 8 ROPs, on a 128-bit memory interface of GDDR3. The central unit runs at 540MHz and the memory clock operates at 700MHz. It will consume no more than 47 Watt.
It performs much better, when compared to GeForce 8600 GS, thanks to the extra Shading Units and remains within the same power envelope (47 Watt) due to being equipped with GDDR3 (against 8600 GS's DDR2).
This GPU is only suited for a 1024x768 (or less) resolution. Some of today's games will run at medium settings although 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.
Recommended CPU
Possible GPU Upgrades
GPU Variants