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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 660 SLI GeForce GTX 660
Cyberpunk 2077 33% 129%
Watch Dogs Legion 29% 122%
Assassins Creed: Valhalla 23% 111%
Call of Duty: Black Ops Cold War 37% 135%
Genshin Impact 34% 131%
FIFA 21 32% 16%
Microsoft Flight Simulator 19% 104%
eFootball PES 2021 32% 16%
Ghostrunner 19% 104%
Horizon: Zero Dawn 27% 118%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 660 SLI are significantly better than the Nvidia GeForce GTX 660.

The GTX 660 and the GeForce GTX 660 have the same core clock speed of 980 MHz, but the GTX 660 has 80 more Texture Mapping Units than the GeForce GTX 660. As a result, the GTX 660 exhibits a 78.4 GTexel/s better Texture Fill Rate than the GeForce GTX 660. 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 and the GeForce GTX 660 have the same core clock speed of 980 MHz, but the GTX 660 has 24 more Render Output Units than the GeForce GTX 660. As a result, the GTX 660 exhibits a 23.5 GPixel/s better Pixel Fill Rate than the GeForce GTX 660. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce GTX 660 was released less than a year after the GTX 660, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GTX 660 has 2048 MB more video memory than the GeForce GTX 660, 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 144.2 GB/sec greater memory bandwidth than the GeForce GTX 660, which means that the memory performance of the GTX 660 is massively better than the GeForce GTX 660.

The GeForce GTX 660 SLI has 1920 Shader Processing Units and the GeForce GTX 660 has 960. However, the actual shader performance of the GTX 660 is 1983 and the actual shader performance of the GeForce GTX 660 is 992. The GTX 660 having 991 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 660.

The GeForce GTX 660 SLI requires 280 Watts to run and the GeForce GTX 660 requires 140 Watts. We would recommend a PSU with at least 600 Watts for the GTX 660 and a PSU with at least 450 Watts for the GeForce GTX 660. The GTX 660 requires 140 Watts more than the GeForce GTX 660 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 660.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed980 MHzvs980 MHz
Boost Clock1033 MHzvs1033 MHz
ArchitectureKepler GK106-400-A1 (x2)Kepler GK106-400-A1
OC Potential Poor vs Good
Driver Support Good vs Good
Release Date01 Sep 2012vs13 Sep 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

Memory4096 MBvs2048 MB
Memory Speed1502 MHzvs1502 MHz
Memory Bus384 Bitvs192 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth288.4GB/secvs144.2GB/sec
L2 Cache 768 KB green tick vs 384 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units1920vs960
Actual Shader Performance95%vs48%
Texture Mapping Units160vs80
Texture Rate156.8 GTexel/svs78.4 GTexel/s
Render Output Units48vs24
Pixel Rate47 GPixel/svs23.5 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections4vs2
HDMI Connections2vs1
DisplayPort Connections-vs0

GPU Power Requirements

Max Power280 Wattsvs140 Watts
Recommended PSU600 Wattsvs450 Watts & 33 Amps

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-3770K 4-Core 3.5GHzvsIntel Core i5-3470 3.2GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewGeForce GTX 660 SLI is a solution of two GeForce GTX 660 put together using NVIDIA'S SLI technology.
SLI relies a lot on proper driver support and may cause micro stuttering in FPS below 30. This means this combination might even perform worse than a single GTX 660.
The optimal performance it delivers is largely better than a single GeForce GTX 680.
Therefore, this combination is sufficient for gaming at 1080p and most demanding games can be played at the highest settings.
GeForce GTX 660 is a Performance Graphics Card based on the Kepler Architecture.

The Kepler Architecture was NVIDIA's big step to power efficiency. Each Stream Multiprocessor (SMX) now hosts 192 Shader Processing Units - against the 48 of older Fermi Architecture, and has been redesigned being now clocked at the same speed of the Central Unit. This means they are more energy efficient and will consequently lead to cooler operating temperatures. However, it also means they are weaker. It can be said that one Fermi SMX is as fast as 2 Kepler SMXs.
Additionally, and not available in all GPUs, Kepler also introduced the Boost Clock Feature. The Boost Clock is an even higher Clock Speed activated when in gaming mode and becomes the effective speed of the GPU. GPU
It equips a GPU GK106-400-A1 which has 5 Stream Multiprocessors activated and thus offers 960 Shader Processing Units, 80 TMUs and 24 ROPs. The Central Unit is initially clocked at 980MHz and goes up to 1033MHz, in Turbo Mode.

The GPU accesses a 2GB frame buffer of fast GDDR5, through a 192-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 1502MHz.

Power Consumption
With a rated board TDP of 140W, it requires at least a 450W PSU with one available 6-pin connector.

GeForce GTX 660 competes with Radeon HD 7850.
At 1920x1080, the best suited resolution for GeForce GTX 660, benchmarks indicate its performance is a little over the older GeForce GTX 570 and quite superior to Radeon HD 7850.

System Suggestions
GeForce GTX 660 is best suited for resolutions up to and including 1920x1080. We recommend a Strong Processor and 8GB of RAM for Optimal Performance.
Recommended CPU
Possible GPU Upgrades
GPU Variants