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Gaming Performance Comparison

Recommended System Requirements
Game Mobility Radeon HD 5870 Crossfire GeForce GTX 660M
Red Dead Redemption 2 284% 435%
Halo: Reach 22% 70%
Cyberpunk 2077 428% 635%
Call of Duty: Modern Warfare 284% 435%
Doom Eternal 230% 360%
Microsoft Flight Simulator 428% 635%
Warcraft 3: Reforged 85% 79%
Grand Theft Auto VI 487% 718%
Star Wars: Jedi - Fallen Order 428% 635%
Dragon Ball Z Kakarot 137% 230%

In terms of overall gaming performance, the graphical capabilities of the AMD Mobility Radeon HD 5870 Crossfire are significantly better than the Nvidia GeForce GTX 660M.

The GeForce GTX 660M has a 135 MHz higher core clock speed than the Radeon HD, but the Radeon HD has 48 more Texture Mapping Units than the GeForce GTX 660M. As a result, the Radeon HD exhibits a 29.3 GTexel/s better Texture Fill Rate than the GeForce GTX 660M. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce GTX 660M has a 135 MHz higher core clock speed than the Radeon HD, but the Radeon HD has 16 more Render Output Units than the GeForce GTX 660M. As a result, the Radeon HD exhibits a 9 GPixel/s better Pixel Fill Rate than the GeForce GTX 660M. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

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

The Mobility Radeon HD 5870 Crossfire and the GeForce GTX 660M have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The Radeon HD has 64 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the Radeon HD is much better than the GeForce GTX 660M.

The Mobility Radeon HD 5870 Crossfire has 1600 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the Radeon HD is 560 and the actual shader performance of the GeForce GTX 660M is 365. The Radeon HD having 195 better shader performance and an altogether better performance when taking into account other relevant data means that the Radeon HD delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

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

The Mobility Radeon HD 5870 Crossfire requires 100 Watts to run and the GeForce GTX 660M requires 50 Watts. The Radeon HD requires 50 Watts more than the GeForce GTX 660M to run. The difference is significant enough that the Radeon HD may have a slight adverse affect on your yearly electricity bills in comparison to the GeForce GTX 660M.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed700 MHzvs835 MHz
Boost Clock-vs950 MHz
ArchitectureTerascale 2 Broadway XT (x2)Kepler GK107-N13E-GE-A2
OC Potential None vs Poor
Driver Support Poor vs Good
Release Date07 Jan 2010vs22 Mar 2012
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - vs green tick
1600x900 - vs green tick
1920x1080 - vs green tick
2560x1440 - vs green tick
3840x2160 - vs green tick

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1000 MHzvs1000 MHz
Memory Bus256 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth128GB/secvs64GB/sec
L2 Cache 512 KB green tick vs 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units1600vs384
Actual Shader Performance27%vs18%
Texture Mapping Units80vs32
Texture Rate56 GTexel/svs26.7 GTexel/s
Render Output Units32vs16
Pixel Rate22.4 GPixel/svs13.4 GPixel/s

GPU Outputs

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

GPU Power Requirements

Max Power100 Wattsvs50 Watts
Recommended PSU--

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-940XM 4-Core 2.13GHzvsIntel Core i5-3360M 2.8GHz
Recommended RAM6 GBvs8 GB
Maximum Recommended Gaming Resolution1920x800vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewMobility Radeon HD 5870 Crossfire is a solution of two Mobility Radeon HD 5870 put together using AMD'S Crossfire technology.
Check the page of Mobility Radeon HD 5870 to know more about its chip.
Crossfire 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 twice as better as a single Mobility Radeon HD 5870 Crossfire performing by itself but at times (depending whether or not the 3D game supports crossfire or in the graphics driver) it performed worse than a single Mobility Radeon HD 5870 Crossfire. This combination might consume up to 100 Watt though the average power consumption might be slightly lower.
Benchmarks indicate today's modern games can be played at high settings using a 720p+ resolution, assuming the game supports Crossfire, properly.
GeForce GTX 660M is a Fast-Middle-Class Mobile Graphics Card based on the first revision of 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.

It equips a GPU Codenamed GK107-N13E-GE-A2 which has 2 Stream Multiprocessors activated and thus offers 384 Shader Processing Units, 32 TMUs and 16 ROPs. The Central Unit is initially clocked at 835MHz and goes up to 950MHz, in Turbo Mode.

The GPU accesses a 2GB frame buffer of fast GDDR5, through a 128-bit memory interface. The size of the frame buffer is exaggerated and no way benefits the GPU. The Memory Clock Operates at 1000MHz.

DirectX 11.0 Support (11.0 Hardware Default) and support for SLI, Kepler Boost, Optimus, CUDA, OpenCL, DirectCompute, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies

Power Consumption
With a rated board TDP of 45W, it is suited for average sized laptops.

Gaming benchmarks indicate its performance is not too far from the desktop GeForce GTX 650.

System Suggestions
We recommend a decent processor (Intel Core i5 Mobile) and 8GB of RAM for a system with GeForce GTX 660M.
Recommended CPU
Possible GPU Upgrades
GPU Variants