Select any two GPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 8870M GeForce GTX 660M
Red Dead Redemption 2 328% 435%
Cyberpunk 2077 488% 635%
Doom Eternal 268% 360%
Dragon Ball Z Kakarot 164% 230%
Call of Duty: Modern Warfare 328% 435%
Microsoft Flight Simulator 488% 635%
FIFA 20 128% 185%
Grand Theft Auto VI 554% 718%
Star Wars: Jedi - Fallen Order 488% 635%
Need For Speed Heat 328% 435%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 8870M are noticeably better than the Nvidia GeForce GTX 660M.

The GeForce GTX 660M has a 110 MHz higher core clock speed than the Radeon HD 8870M, but the Radeon HD 8870M has 8 more Texture Mapping Units than the GeForce GTX 660M. As a result, the Radeon HD 8870M exhibits a 2.3 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 110 MHz higher core clock speed than the Radeon HD 8870M and the same number of Render Output Units. This results in the GeForce GTX 660M providing 1.8 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 Radeon HD 8870M was released over a year more recently than the GeForce GTX 660M, and so the Radeon HD 8870M is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce GTX 660M.

The Radeon HD 8870M 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 8870M has 8 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the Radeon HD 8870M is marginally better than the GeForce GTX 660M.

The Radeon HD 8870M has 640 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the Radeon HD 8870M is 496 and the actual shader performance of the GeForce GTX 660M is 365. The Radeon HD 8870M having 131 better shader performance and an altogether better performance when taking into account other relevant data means that the Radeon HD 8870M delivers a marginally smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The Radeon HD 8870M requires 50 Watts to run and the GeForce GTX 660M requires 50 Watts. The two GPUs require the same amount of wattage to run. As such, there is no need to worry about which will more significantly affect your yearly electricity bills.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed725 MHzvs835 MHz
Boost Clock775 MHzvs950 MHz
ArchitectureGCN 1.1 Venus XTKepler GK107-N13E-GE-A2
OC Potential Poor vs Poor
Driver Support - vs Good
Release Date01 Apr 2013vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
8.4
green tick vs
7.9
1600x900
6.4
green tick vs
5.9
1920x1080
5
green tick vs
4.4
2560x1440
3.1
green tick vs
2.8
3840x2160
2.2
green tick vs
1.8

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1125 MHzvs1000 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth72GB/secvs64GB/sec
L2 Cache 256 KB green tick vs green tick 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units640vs384
Actual Shader Performance24%vs18%
Technology28nmvs28nm
Texture Mapping Units40vs32
Texture Rate29 GTexel/svs26.7 GTexel/s
Render Output Units16vs16
Pixel Rate11.6 GPixel/svs13.4 GPixel/s
Comparison

GPU Outputs

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

GPU Power Requirements

Max Power50 Wattsvs50 Watts
Recommended PSU--

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3380M 2.9GHzvsIntel Core i5-3360M 2.8GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1600x900vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Radeon HD 8870M is a Performance Mobile Graphics Card based on the Second Revision of the GCN Architecture.

Architecture
The GCN 1.1 Release adds support for AMD's TrueAudio Technology which does calculations of audio effects "better" than the CPU and further improves the Powertune Technology.

GPU
It equips a GPU codenamed Venus XT which has 10 Compute Units activated and thus offers 640 Shader Processing Units, 40 TMUs and 16 ROPs. The Central Unit Initially Operates at 725MHz and goes up to 775MHz, in Turbo Mode.

Memory
The GPU accesses a 2GB frame buffer of fast GDDR5, through a 128-bit memory interface. The size of the frame buffer is adequate. The memory clock operates at 1125MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for Crossfire, PowerTune Technology, Eyefinity, App Acceleration, HD3D, ZeroCore Power and other technologies.

Power Consumption
With a rated board TDP of 50W, it is suited for 17" or larger laptops.

Performance
Gaming benchmarks put its performance on average with NVIDIA's GeForce GTX 670M.

System Suggestions
We recommend a Decent Processor (Intel Core i5 Mobile) and 8GB of RAM for a system with Radeon HD 8870M.
Overview
GeForce GTX 660M is a Fast-Middle-Class Mobile Graphics Card based on the first revision of the Kepler Architecture.

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 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.

Memory
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.

Features
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.

Performance
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
N/A
N/A
GPU Variants
-
-

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