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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 660 Palit 2GB Edition Radeon HD 5850 XFX Black 1GB Edition
Red Dead Redemption 2 118% 197%
Doom Eternal 88% 155%
Cyberpunk 2077 200% 308%
Call of Duty: Modern Warfare 118% 197%
Dragon Ball Z Kakarot 35% 83%
Microsoft Flight Simulator 200% 308%
Star Wars: Jedi - Fallen Order 200% 308%
Grand Theft Auto VI 234% 354%
Need For Speed Heat 118% 197%
Warcraft 3: Reforged 92% 89%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 660 Palit 2GB Edition are significantly better than the AMD Radeon HD 5850 XFX Black 1GB Edition.

The GTX 660 has a 215 MHz higher core clock speed and 8 more Texture Mapping Units than the HD 5850. This results in the GTX 660 providing 23.3 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 660 has a 215 MHz higher core clock speed than the HD 5850, but the HD 5850 has 8 more Render Output Units than the GTX 660. As a result, the HD 5850 exhibits a 1 GPixel/s better Pixel Fill Rate than the GTX 660. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 660 was released over a year more recently than the HD 5850, and so the GTX 660 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the HD 5850.

The GTX 660 has 1024 MB more video memory than the HD 5850, 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 0.2 GB/sec greater memory bandwidth than the HD 5850, which means that the memory performance of the GTX 660 is marginally better than the HD 5850.

The GeForce GTX 660 Palit 2GB Edition has 960 Shader Processing Units and the Radeon HD 5850 XFX Black 1GB Edition has 1440. However, the actual shader performance of the GTX 660 is 991 and the actual shader performance of the HD 5850 is 551. The GTX 660 having 440 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 660 delivers a noticeably smoother and more efficient experience when processing graphical data than the HD 5850.

The GTX 660 transistor size technology is 12 nm (nanometers) smaller than the HD 5850. This means that the GTX 660 is expected to run slightly cooler and achieve higher clock frequencies than the HD 5850.

The GeForce GTX 660 Palit 2GB Edition requires 140 Watts to run and the Radeon HD 5850 XFX Black 1GB Edition requires 151 Watts. We would recommend a PSU with at least 450 Watts for the GTX 660 and a PSU with at least 500 Watts for the HD 5850. The HD 5850 requires 11 Watts more than the GTX 660 to run. The difference is not significant enough for the HD 5850 to have a noticeably larger impact on your yearly electricity bills than the GTX 660.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed980 MHzvs765 MHz
Boost Clock1032 MHzvs-
ArchitectureKepler GK106-400-A1Terascale 2 Cypress PRO
OC Potential Good vs Poor
Driver Support Good vs Poor
Release Date06 Sep 2012vs13 Apr 2010
GPU LinkGD LinkGD Link

Resolution Performance

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GPU Memory

Memory2048 MBvs1024 MB
Memory Speed1502 MHzvs1125 MHz
Memory Bus192 Bitvs256 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth144.2GB/secvs144GB/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 Units960vs1440
Actual Shader Performance48%vs27%
Texture Mapping Units80vs72
Texture Rate78.4 GTexel/svs55.1 GTexel/s
Render Output Units24vs32
Pixel Rate23.5 GPixel/svs24.5 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections0vs0
DVI Connections2vs2
HDMI Connections1vs1
DisplayPort Connections1vs-

GPU Power Requirements

Max Power140 Wattsvs151 Watts
Recommended PSU450 Watts & 30 Ampsvs500 Watts & 40 Amps

GPU Features

Shader Model5.0vs5.0
Open GL4.5vs4.3
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3470 3.2GHzvsIntel Core i7-860 Quad 2.80GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GTX 660 Palit 2GB Edition is a Special Edition of NVIDIA's Performance GeForce GTX 660 2GB, created by Palit.

Overclock: Central Unit

Overclock: Memory Clock

Frame Buffer

Cooling Solution

Benchmarks Indicate no Performance Boost over the Reference GeForce GTX 660 2GB.
Radeon HD 5850 XFX Black 1GB Edition is a special edition of AMD's High-End Radeon HD 5850 1GB, created by XFX.

Overclock Out of The Box
The Central Unit now runs at 765MHz, instead of 725MHz while the Memory Clock is now of 1125MHz.

Cooling Solution
The Cooling System has been replaced by XFX's custom-designed Thermal Design, meaning the Graphics Card runs cooler under load.

Benchmarks indicate a 6% performance over the reference Radeon HD 5850 1GB.
Recommended CPU
Possible GPU Upgrades
GPU Variants