Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 660 EVGA SC Signature 2 Edition SLI GeForce GTX 680
Cyberpunk 2077 25% 59%
Assassins Creed: Valhalla 15% 46%
Call of Duty: Black Ops Cold War 11% 41%
Watch Dogs Legion 21% 54%
Godfall 104% 158%
FIFA 21 37% 20%
Microsoft Flight Simulator 11% 41%
Grand Theft Auto VI 76% 124%
World of Warcraft: Shadowlands 80% 128%
Genshin Impact 25% 59%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 660 EVGA SC Signature 2 Edition SLI are noticeably better than the Nvidia GeForce GTX 680.

The GTX 660 has a 40 MHz higher core clock speed and 32 more Texture Mapping Units than the GeForce GTX 680. This results in the GTX 660 providing 38.6 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 GTX 660 has a 40 MHz higher core clock speed and 16 more Render Output Units than the GeForce GTX 680. This results in the GTX 660 providing 18 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 660 was released less than a year after the GeForce GTX 680, and so they are likely to have similar driver support for optimizing performance when running the latest games.

Both GPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings.

The GTX 660 has 4096 MB more video memory than the GeForce GTX 680, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 660 also has superior memory performance overall.

The GTX 660 has 96.1 GB/sec greater memory bandwidth than the GeForce GTX 680, which means that the memory performance of the GTX 660 is massively better than the GeForce GTX 680.

The GeForce GTX 660 EVGA SC Signature 2 Edition SLI has 1920 Shader Processing Units and the GeForce GTX 680 has 1536. However, the actual shader performance of the GTX 660 is 2133 and the actual shader performance of the GeForce GTX 680 is 1625. The GTX 660 having 508 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 660 delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 680.

The GeForce GTX 660 EVGA SC Signature 2 Edition SLI requires 280 Watts to run and the GeForce GTX 680 requires 195 Watts. We would recommend a PSU with at least 600 Watts for the GTX 660 and a PSU with at least 550 Watts for the GeForce GTX 680. The GTX 660 requires 85 Watts more than the GeForce GTX 680 to run. The difference is significant enough that the GTX 660 may have an adverse affect on your yearly electricity bills in comparison to the GeForce GTX 680.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1046 MHzvs1006 MHz
Boost Clock1111 MHzvs1058 MHz
ArchitectureKepler GK106-400-A1Kepler GK104-400-A2
OC Potential Poor vs Good
Driver Support Good vs Good
Release Date01 Sep 2012vs22 Mar 2012
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - vs green tick
1600x900 - vs green tick
green tick vs
2560x1440 - vs green tick
3840x2160 - vs green tick

GPU Memory

Memory6144 MBvs2048 MB
Memory Speed1502 MHzvs1502 MHz
Memory Bus384 Bitvs256 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth288.4GB/secvs192.3GB/sec
L2 Cache 384 KB vs green tick 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units1920vs1536
Actual Shader Performance100%vs78%
Texture Mapping Units160vs128
Texture Rate167.4 GTexel/svs128.8 GTexel/s
Render Output Units48vs32
Pixel Rate50.2 GPixel/svs32.2 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections2vs2
HDMI Connections1vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power280 Wattsvs195 Watts
Recommended PSU600 Watts & 29 Ampsvs550 Watts & 40 Amps

GPU Features

Shader Model5.0vs5.0
Open GL4.5vs4.5
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3570K 3.4GHzvsIntel Core i7-3770K 4-Core 3.5GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution2560x1440vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewThe SLI setup of GeForce GTX 660 EVGA SC Signature 2 Edition.GeForce GTX 680 is a high-end Graphics Card based on the 28nm, Kepler architecture.
The Kepler architecture allows more SPUs but the Fermi SPUs (used on the 400 & 500 Series) are clocked twice as fast as the Kepler architecture. Therefore, don't let the large amount of Pipelines fool you, as the 1536 Pipelines are equivalent to 768 Pipelines, of the Fermi architecture.
GeForce GTX 680 features a 1006Mhz core-clock that can automatically set itself to 1058Mhz using a technology similar to the one used on Intel GPUs. Another huge surprise is the TDP that went from 244 Watts, to just 195 Watts, as two SPUs of the Kepler architecture consume 10% less power. However, the amount was doubled and so the power save is not as high as it could have been.
GeForce GTX 680 was the fastest single GPU of the world until Radeon HD 7970 GHz Edition was released.
All games will run on the maximum settings smoothly.
Recommended CPU
Possible GPU Upgrades
GPU Variants