Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7950 Boost Edition Crossfire GeForce GTX 660 Ti
Cyberpunk 2077 55% 158%
Hyper Scape 5% 75%
Horizon: Zero Dawn 13% 88%
Call of Duty Warzone 13% 88%
Valorant 89% 82%
Assassins Creed: Valhalla 55% 158%
Grand Theft Auto VI 72% 187%
Death Stranding 19% 98%
Doom Eternal 15% 91%
TrackMania Nations Remake 82% 70%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7950 Boost Edition Crossfire are significantly better than the Nvidia GeForce GTX 660 Ti.

The GTX 660 Ti has a 65 MHz higher core clock speed than the HD 7950, but the HD 7950 has 112 more Texture Mapping Units than the GTX 660 Ti. As a result, the HD 7950 exhibits a 87.9 GTexel/s better Texture Fill Rate than the GTX 660 Ti. 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 Ti has a 65 MHz higher core clock speed than the HD 7950, but the HD 7950 has 40 more Render Output Units than the GTX 660 Ti. As a result, the HD 7950 exhibits a 32.4 GPixel/s better Pixel Fill Rate than the GTX 660 Ti. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 660 Ti was released less than a year after the HD 7950, 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 HD 7950 has 4096 MB more video memory than the GTX 660 Ti, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the HD 7950 also has superior memory performance overall.

The HD 7950 has 335.8 GB/sec greater memory bandwidth than the GTX 660 Ti, which means that the memory performance of the HD 7950 is massively better than the GTX 660 Ti.

The Radeon HD 7950 Boost Edition Crossfire has 3584 Shader Processing Units and the GeForce GTX 660 Ti has 1344. However, the actual shader performance of the HD 7950 is 2818 and the actual shader performance of the GTX 660 Ti is 1317. The HD 7950 having 1501 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7950 delivers a massively smoother and more efficient experience when processing graphical data than the GTX 660 Ti.

The GeForce GTX 660 Ti requires 150 Watts to run but there is no entry for the HD 7950. We would recommend a PSU with at least 450 Watts for the GTX 660 Ti, but we do not have a recommended PSU wattage for the HD 7950.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed850 MHzvs915 MHz
Boost Clock925 MHzvs980 MHz
ArchitectureGCN 1.0 Tahiti PRO2 (x2)Kepler GK104-300-KD-A2
OC Potential Fair vs Good
Driver Support Great vs Good
Release Date01 Aug 2012vs16 Aug 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 Speed1250 MHzvs1502 MHz
Memory Bus768 Bitvs192 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth480GB/secvs144.2GB/sec
L2 Cache 1536 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 Units3584vs1344
Actual Shader Performance100%vs63%
Texture Mapping Units224vs112
Texture Rate190.4 GTexel/svs102.5 GTexel/s
Render Output Units64vs24
Pixel Rate54.4 GPixel/svs22 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections1vs2
HDMI Connections1vs1
DisplayPort Connections0vs1

GPU Power Requirements

Max Power-150 Watts
Recommended PSU-450 Watts & 33 Amps

GPU Features

Shader Model5.0vs5.0
Open GL4.4vs4.5
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-3770K 4-Core 3.5GHzvsIntel Core i5-3570K 3.4GHz
Recommended RAM12 GBvs8 GB
Maximum Recommended Gaming Resolution2560x1600vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewThe Crossfire setup of Radeon HD 7950 Boost Edition.Overview
GeForce GTX 660 Ti 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 GK104-300-KD-A2 which has 7 Stream Multiprocessors activated and thus offers 1344 Shader Processing Units, 112 TMUs and 24 ROPs. The Central Unit is initially clocked at 915MHz and goes up to 980MHz, 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 150W, it requires at least a 450W PSU with two available 6-pin connectors.

At 1920x1080, the best suited resolution for GeForce GTX 660 Ti, benchmarks indicate its performance is a little over the older GeForce GTX 580.

System Suggestions
GeForce GTX 660 Ti 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