Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game Radeon RX 490X 8GB GeForce GTX 660 Ti 3-way SLI
Cyberpunk 2077 37% 7%
Hitman 3 18% 20%
Assassins Creed: Valhalla 43% 15%
The Medium 22% 16%
Resident Evil 8 37% 7%
FIFA 21 68% 53%
Call of Duty: Black Ops Cold War 44% 18%
Grand Theft Auto VI 12% 30%
Genshin Impact 37% 7%
Far Cry 6 9% 34%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon RX 490X 8GB are significantly better than the Nvidia GeForce GTX 660 Ti 3-way SLI.

The RX 490X has a 85 MHz higher core clock speed and 48 more Texture Mapping Units than the GTX 660 Ti. This results in the RX 490X providing 76.6 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 RX 490X has a 85 MHz higher core clock speed and 56 more Render Output Units than the GTX 660 Ti. This results in the RX 490X providing 62.1 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 RX 490X was released over three years more recently than the GTX 660 Ti, and so the RX 490X is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GTX 660 Ti 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 RX 490X has 2048 MB more video memory than the GTX 660 Ti, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the GTX 660 Ti has superior memory performance.

The GTX 660 Ti has 432.6 GB/sec greater memory bandwidth than the RX 490X, which means that the memory performance of the GTX 660 Ti is massively better than the RX 490X.

The Radeon RX 490X 8GB has 6144 Shader Processing Units and the GeForce GTX 660 Ti 3-way SLI has 4032. However, the actual shader performance of the GTX 660 Ti is 3951. The RX 490X having 2193 better shader performance is not particularly notable, as altogether the GTX 660 Ti performs better when taking into account other relevant data.

The RX 490X transistor size technology is 14 nm (nanometers) smaller than the GTX 660 Ti. This means that the RX 490X is expected to run slightly cooler and achieve higher clock frequencies than the GTX 660 Ti.

The Radeon RX 490X 8GB requires 250 Watts to run and the GeForce GTX 660 Ti 3-way SLI requires 450 Watts. We would recommend a PSU with at least 600 Watts for the RX 490X. The GTX 660 Ti requires 200 Watts more than the RX 490X to run. The difference is significant enough that the GTX 660 Ti may have an adverse affect on your yearly electricity bills in comparison to the RX 490X.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1000 MHzvs915 MHz
Boost Clock-vs980 MHz
ArchitectureGCN 1.3 Polaris 10Kepler GK104-200-KD-A2 (x3)
OC Potential None vs Good
Driver Support Great vs Good
Release Date01 Jun 2016vs01 Aug 2012
GPU LinkGD LinkGD Link

Resolution Performance

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

GPU Memory

MemoryN/Avs6144 MB
Memory Speed500 MHzvs1502 MHz
Memory Bus-vs576 Bit
Memory Type-vsGDDR5
Memory Bandwidth-vs432.6GB/sec
L2 Cache 4096 KB green tick vs 1152 KB
Delta Color Compression yes vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units6144vs4032
Actual Shader Performance100%vs100%
Texture Mapping Units384vs336
Texture Rate384 GTexel/svs307.4 GTexel/s
Render Output Units128vs72
Pixel Rate128 GPixel/svs65.9 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections2vs0
HDMI Connections1vs0
DisplayPort Connections3vs-

GPU Power Requirements

Max Power250 Wattsvs450 Watts
Recommended PSU600 Watts & 42 Amps-

GPU Features

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

GPU Supporting Hardware

Recommended Processor-Intel Core i5-3570K 3.4GHz
Recommended RAM-8 GB
Maximum Recommended Gaming Resolution-1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Radeon RX 490X 8GB is an Upcoming High-End Graphics Card based on the Third Revision of the Graphics Core Next (GCN) Architecture.



The GPU accesses a 8GB frame buffer of Second Generation HBM, through a 4096-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 500MHz.

Power Consumption


System Suggestions
Radeon RX 490X 8GB is best suited for resolutions up to and including 3840x2160. We recommend a High-End Processor and 16GB of RAM for Optimal Performance.
GeForce GTX 660 Ti 3-way SLI is a solution of three GeForce GTX 660 Ti put together using NVIDIA'S SLI technology.
Check the page of GeForce GTX 660 Ti to know more about its chip.
As usual, SLI relies a lot on proper driver support and may suffer from micro-stuttering in lower frame rates (below 30). Benchmarks indicate the performance is overall, is up to X% better than a single GeForce GTX 660 Ti performing by itself but at times (depending whether or not the 3D game supports SLI or in the graphics driver) it performed worse than a single GeForce GTX 660 Ti. Expect this combination to draw up to 450 Watt though the average power consumption should be slightly lower.
Even the most demanding games will run at the highest settings.
Recommended CPU
Possible GPU Upgrades
GPU Variants