drivers – I have Windows 10 and Ubuntu Dual boot but ubuntu alone gets overheated

my computer has windows 10 as the default os but as it is extremely slow and rubbish i have installed ubuntu… even though ubuntu is good it is getting 5 times overheated than windows while attending online classes..

vijay@vijay-Lenovo-E41-25:~$ lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. (AMD) Family 15h (Models 60h-6fh) Processor Root Complex
00:00.2 IOMMU: Advanced Micro Devices, Inc. (AMD) Family 15h (Models 60h-6fh) I/O Memory Management Unit
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. (AMD/ATI) Stoney (Radeon R2/R3/R4/R5 Graphics) (rev ea)
00:01.1 Audio device: Advanced Micro Devices, Inc. (AMD/ATI) Device 15b3
00:02.0 Host bridge: Advanced Micro Devices, Inc. (AMD) Family 15h (Models 60h-6fh) Host Bridge
00:02.2 PCI bridge: Advanced Micro Devices, Inc. (AMD) Family 15h (Models 60h-6fh) Processor Root Port
00:02.4 PCI bridge: Advanced Micro Devices, Inc. (AMD) Family 15h (Models 60h-6fh) Processor Root Port
00:03.0 Host bridge: Advanced Micro Devices, Inc. (AMD) Family 15h (Models 60h-6fh) Host Bridge
00:08.0 Encryption controller: Advanced Micro Devices, Inc. (AMD) Carrizo Platform Security Processor
00:09.0 Host bridge: Advanced Micro Devices, Inc. (AMD) Carrizo Audio Dummy Host Bridge
00:09.2 Audio device: Advanced Micro Devices, Inc. (AMD) Family 15h (Models 60h-6fh) Audio Controller
00:10.0 USB controller: Advanced Micro Devices, Inc. (AMD) FCH USB XHCI Controller (rev 20)
00:11.0 SATA controller: Advanced Micro Devices, Inc. (AMD) FCH SATA Controller (AHCI mode) (rev 4b)
00:12.0 USB controller: Advanced Micro Devices, Inc. (AMD) FCH USB EHCI Controller (rev 49)
00:14.0 SMBus: Advanced Micro Devices, Inc. (AMD) FCH SMBus Controller (rev 4b)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. (AMD) FCH LPC Bridge (rev 11)
00:18.0 Host bridge: Advanced Micro Devices, Inc. (AMD) Stoney HT Configuration
00:18.1 Host bridge: Advanced Micro Devices, Inc. (AMD) Stoney Address Maps
00:18.2 Host bridge: Advanced Micro Devices, Inc. (AMD) Stoney DRAM Configuration
00:18.3 Host bridge: Advanced Micro Devices, Inc. (AMD) Stoney Miscellaneous Configuration
00:18.4 Host bridge: Advanced Micro Devices, Inc. (AMD) Stoney PM Configuration
00:18.5 Host bridge: Advanced Micro Devices, Inc. (AMD) Stoney NB Performance Monitor
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
02:00.0 Network controller: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter (rev 31)

.. here are my system specs …i will also give the gui version of spec

And also do suggest me a browser which is fast and has all the latest features which is also a light weight oneNow i am using opera it is good but heats up my system asap when i open it especially when i attend a online class

I also have a doubt to whether change the drivers so that i can save my battery life because when i use windows and attend my online classes the battery will last two times than ubuntu
and it will hot be overheated as ubuntu

GUI Version of my PC specs

Thank you for your help in advance