Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 620 Zotac Synergy 2GB Edition GeForce GTX 650 Gigabyte OC 1GB Edition
Cyberpunk 2077 1638% 372%
Assassins Creed: Valhalla 1490% 332%
Call of Duty: Black Ops Cold War 1438% 318%
FIFA 21 777% 138%
Watch Dogs Legion 1577% 356%
Microsoft Flight Simulator 1438% 318%
World of Warcraft: Shadowlands 2392% 577%
Grand Theft Auto VI 2346% 565%
Godfall 2723% 667%
Genshin Impact 1638% 372%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 650 Gigabyte OC 1GB Edition are massively better than the Nvidia GeForce GT 620 Zotac Synergy 2GB Edition.

The GTX 650 has a 410 MHz higher core clock speed and 16 more Texture Mapping Units than the GT 620. This results in the GTX 650 providing 24.3 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 GTX 650 has a 410 MHz higher core clock speed and 12 more Render Output Units than the GT 620. This results in the GTX 650 providing 15 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 650 was released less than a year after the GT 620, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GT 620 has 1024 MB more video memory than the GTX 650, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the GTX 650 has superior memory performance.

The GTX 650 has 71.5 GB/sec greater memory bandwidth than the GT 620, which means that the memory performance of the GTX 650 is much better than the GT 620.

The GeForce GT 620 Zotac Synergy 2GB Edition has 96 Shader Processing Units and the GeForce GTX 650 Gigabyte OC 1GB Edition has 384. However, the actual shader performance of the GT 620 is 134 and the actual shader performance of the GTX 650 is 426. The GTX 650 having 292 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 650 delivers a massively smoother and more efficient experience when processing graphical data than the GT 620.

The GTX 650 transistor size technology is 12 nm (nanometers) smaller than the GT 620. This means that the GTX 650 is expected to run slightly cooler and achieve higher clock frequencies than the GT 620.

The GeForce GT 620 Zotac Synergy 2GB Edition requires 49 Watts to run but there is no entry for the GeForce GTX 650 Gigabyte OC 1GB Edition. We would recommend a PSU with at least 300 Watts for the GT 620 and a PSU with at least 400 Watts for the GTX 650. The GTX 650 has been recommended a PSU with 100 Watts more than the GT 620. The difference is significant enough that the GTX 650 may have an adverse affect on your yearly electricity bills in comparison to the GT 620.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed700 MHzvs1110 MHz
Boost Clock-vs-
ArchitectureFermi GF108-100-KB-A1Kepler GK107-450-A2
OC Potential Fair vs Poor
Driver Support Poor vs Good
Release Date15 May 2012vs01 Sep 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
2.8
vs green tick
5.9
1920x1080
2.1
vs green tick
4.9
2560x1440
1.5
vs green tick
3.1
3840x2160 - vs green tick
2.1

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed533 MHzvs1250 MHz
Memory Bus64 Bitvs128 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth8.5GB/secvs80GB/sec
L2 Cache 128 KB vs green tick 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units96vs384
Actual Shader Performance6%vs21%
Technology40nmvs28nm
Texture Mapping Units16vs32
Texture Rate11.2 GTexel/svs35.5 GTexel/s
Render Output Units4vs16
Pixel Rate2.8 GPixel/svs17.8 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs1
DVI Connections2vs2
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power49 Watts-
Recommended PSU300 Watts & 22 Ampsvs400 Watts & 33 Amps

GPU Features

DirectX12.0vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.5
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsno
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Celeron G550 2.6GHzvsIntel Core i3-3220 3.3GHz
Recommended RAM4 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GT 620 Zotac Synergy 2GB Edition is a special edition of NVIDIA's Entry-Level GeForce GT 620, created by Zotac.

Overclock: Central Unit
The Central Unit runs at the same speed.

Overclock: Memory Clock
The Operating Memory Clock runs at 533MHz and the Frame Buffer was raised to 2GB. This is a gimmick and in no way benefits the GPU.

Cooling Solution
The Cooling System remains the same.

Performance
Without Overclocking Out of The Box, GeForce GT 620 Zotac Synergy 2GB Edition is as fast as the reference GeForce GT 620.
GeForce GTX 650 Gigabyte OC 1GB Edition is a special edition of the fast-middle-class GeForce GTX 650 1GB.
This special edition comes overclocked out of the box to 1110MHz and features a custom-designed 10 cm cooler.
Benchmarks indicate a 4% performance boost when compared to the reference card and so this GPU is suitable for medium to high settings on most demanding games but not with extreme resolutions.
Recommended CPU
Possible GPU Upgrades
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GPU Variants
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