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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7790 DirectCU II OC 2GB Edition GeForce GTX 660 EVGA OC 2GB Edition
Grand Theft Auto VI 333% 221%
New World 172% 102%
Resident Evil 8 300% 197%
The Ascent 437% 299%
Battlefield 2042 300% 197%
Far Cry 6 345% 230%
FIFA 22 55% 15%
Halo Infinite 300% 197%
Forza Horizon 5 142% 80%
Age of Empires IV 207% 128%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 660 EVGA OC 2GB Edition are significantly better than the AMD Radeon HD 7790 DirectCU II OC 2GB Edition.

The HD 7790 has a 82 MHz higher core clock speed than the GTX 660, but the GTX 660 has 24 more Texture Mapping Units than the HD 7790. As a result, the GTX 660 exhibits a 19.2 GTexel/s better Texture Fill Rate than the HD 7790. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The HD 7790 has a 82 MHz higher core clock speed than the GTX 660, but the GTX 660 has 8 more Render Output Units than the HD 7790. As a result, the GTX 660 exhibits a 6.6 GPixel/s better Pixel Fill Rate than the HD 7790. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The HD 7790 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 Radeon HD 7790 DirectCU II OC 2GB Edition and the GeForce GTX 660 EVGA OC 2GB Edition have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The GTX 660 has 41.8 GB/sec greater memory bandwidth than the HD 7790, which means that the memory performance of the GTX 660 is noticeably better than the HD 7790.

The Radeon HD 7790 DirectCU II OC 2GB Edition has 896 Shader Processing Units and the GeForce GTX 660 EVGA OC 2GB Edition has 960. However, the actual shader performance of the HD 7790 is 963 and the actual shader performance of the GTX 660 is 1016. The GTX 660 having 53 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 660 delivers a significantly smoother and more efficient experience when processing graphical data than the HD 7790.

The GeForce GTX 660 EVGA OC 2GB Edition requires 140 Watts to run but there is no entry for the HD 7790. We would recommend a PSU with at least 450 Watts for the GTX 660, but we do not have a recommended PSU wattage for the HD 7790.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1075 MHzvs993 MHz
Boost Clock-vs1058 MHz
ArchitectureGCN 1.0 Bonaire XTKepler GK106-400-A1
OC Potential Poor vs Good
Driver Support - vs Good
Release Date22 Mar 2013vs01 Sep 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
7.9
vs green tick
8.9
1920x1080
6
vs green tick
7
2560x1440
4.3
vs green tick
5.1
3840x2160
2.6
vs green tick
3.4

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1600 MHzvs1502 MHz
Memory Bus128 Bitvs192 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth102.4GB/secvs144.2GB/sec
L2 Cache 512 KB green tick vs 384 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units896vs960
Actual Shader Performance46%vs49%
Technology28nmvs28nm
Texture Mapping Units56vs80
Texture Rate60.2 GTexel/svs79.4 GTexel/s
Render Output Units16vs24
Pixel Rate17.2 GPixel/svs23.8 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs0
DVI Connections2vs2
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power-140 Watts
Recommended PSU-450 Watts & 24 Amps

GPU Features

DirectX11.1vs12.0
Shader Model5.0vs5.0
Open GL4.2vs4.5
Open CL-vs-
Notebook GPUnono
SLI/Crossfireyesvsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3250 3.5GHzvsIntel Core i5-3470 3.2GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1600x900vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon HD 7790 DirectCU II OC 2GB Edition is a special edition of the performance Radeon HD 7790.
This edition comes with a cooling solution called DirectCU II, which achieves 20% lower temps and vastly quieter performance than reference with direct-contact copper heatpipes and dual fans, according to Asus. It also comes overclocked out of the box in the core-clock to 1075MHz and on the memory clock to 1600MHz, though the latter might prove useless, as this card might not benefit from extra bandwidth.
The 2GB framer buffer proves useless and Benchmarks indicate a 5% performance boost when compared to the reference card.
GeForce GTX 660 EVGA OC 2GB Edition a special edition of GeForce GTX 660.
The new features include overclocking in the central unit which was raised from 980MHz to 993MHz whereas the boost clock can now reach 1058MHz, instead of 1033MHz. The memory clock was left untouched.
The overclocking is only very slightly and so expect at most a performance boost of around 1% when compared to the standard GeForce GTX 660.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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