Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 980 4GB SLI GeForce GTX 660 Ti Gainward Phantom Edition
Cyberpunk 2077 31% 87%
Assassins Creed: Valhalla 36% 73%
Call of Duty: Black Ops Cold War 29% 92%
Genshin Impact 30% 89%
eFootball PES 2021 65% 5%
Mafia: Definitive Edition 0% 171%
Watch Dogs Legion 33% 82%
FIFA 21 65% 5%
Marvel's Avengers 34% 79%
Microsoft Flight Simulator 38% 67%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 980 4GB SLI are massively better than the Nvidia GeForce GTX 660 Ti Gainward Phantom Edition.

The GTX 980 has a 120 MHz higher core clock speed and 144 more Texture Mapping Units than the GTX 660 Ti. This results in the GTX 980 providing 175.6 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 GTX 980 has a 120 MHz higher core clock speed and 104 more Render Output Units than the GTX 660 Ti. This results in the GTX 980 providing 120 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 GTX 980 was released over a year more recently than the GTX 660 Ti, and so the GTX 980 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GTX 660 Ti.

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 GTX 980 has 6144 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 GTX 980 also has superior memory performance overall.

The GTX 980 has 302.2 GB/sec greater memory bandwidth than the GTX 660 Ti, which means that the memory performance of the GTX 980 is massively better than the GTX 660 Ti.

The GeForce GTX 980 4GB SLI has 4096 Shader Processing Units and the GeForce GTX 660 Ti Gainward Phantom Edition has 1344. However, the actual shader performance of the GTX 980 is 6724 and the actual shader performance of the GTX 660 Ti is 1457. The GTX 980 having 5267 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 980 delivers a massively smoother and more efficient experience when processing graphical data than the GTX 660 Ti.

The GeForce GTX 980 4GB SLI requires 350 Watts to run but there is no entry for the GeForce GTX 660 Ti Gainward Phantom Edition. We would recommend a PSU with at least 750 Watts for the GTX 980.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1126 MHzvs1006 MHz
Boost Clock1216 MHzvs1084 MHz
ArchitectureMaxwell GM204-400-A1 (x2)Kepler GK104-300-KD-A2
OC Potential Fair vs Poor
Driver Support Great vs Good
Release Date19 Sep 2014vs01 Aug 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
10
green tick vs
9.8
1920x1080
10
green tick vs
7.8
2560x1440
9.9
green tick vs
5.6
3840x2160
7.8
green tick vs
4

GPU Memory

Memory8192 MBvs2048 MB
Memory Speed1753 MHzvs1527 MHz
Memory Bus512 Bitvs192 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth448.8GB/secvs146.6GB/sec
L2 Cache 4096 KB green tick vs 384 KB
Delta Color Compression yes vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units4096vs1344
Actual Shader Performance100%vs70%
Technology28nmvs28nm
Texture Mapping Units256vs112
Texture Rate288.3 GTexel/svs112.7 GTexel/s
Render Output Units128vs24
Pixel Rate144.1 GPixel/svs24.1 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections1vs2
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power350 Watts-
Recommended PSU750 Watts & 42 Amps-

GPU Features

DirectX12.1vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.5
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-5820K 6-Core 3.3GHzvsIntel Core i5-3570K 3.4GHz
Recommended RAM16 GBvs8 GB
Maximum Recommended Gaming Resolution5760x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GTX 980 4GB SLI is a solution of two GeForce GTX 980 4GB put together using NVIDIA's SLI technology.

Architecture
The Second variant of the Maxwell Architecture, despite being also manufactured with a 28nm technology, has an extremely large L2 Cache and features a Third Generation Delta Color Compression which allows NVIDIA to produce Graphics Cards with relatively small memory data transfer rates, without causing too much impact on the overall performance. Furthermore, the Shaders have been redesigned and are both more powerful and energy efficient.

GPU
It consists of 2 GPUs codenamed GM204-400-A1 which, together, offer 4096 Shader Processing Units, 256 TMUs and 128 ROPs, on a 512-bit memory interface of fast GDDR5. The central unit runs at 1126MHz and goes up to 1216MHz, in Turbo Mode, while the memory clock operates at 1753MHz.

Power Consumption
Power Consumption lies between 300W and 400W.

Performance
Gaming benchmarks prove that at 4K (3840x2160) GeForce GTX 980 4GB SLI is over 7% faster than AMD's Radeon R9 295X2.

System Suggestions
We recommend a very strong processor (Intel Core i7 Six Core/AMD FX Eight Core) and 16GB of RAM for a system with GeForce GTX 980 4GB SLI.
GeForce GTX 660 Ti Gainward Phantom Edition is a special edition of GeForce GTX 660 Ti.
The new features include a new cooling solution system which consists of a dual-fan solution which is more effective than the standard/reference cooler. In terms of overclocking, the base-clock was increased from 915MHz to 1006MHz and the boost clock can now reach 1084MHz, instead of 980MHz. The memory clock was increased to 1527MHz.
The overclocking is therefore extreme and the performance boost is around 5% when compared to the standard GeForce GTX 660 Ti.
Recommended CPU
Possible GPU Upgrades
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GPU Variants
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