F5F Stay Refreshed Hardware Desktop UEFI alongside CSM, independent of CSM

UEFI alongside CSM, independent of CSM

UEFI alongside CSM, independent of CSM

T
TheCCSampson
Member
Find
70
12-22-2016, 05:31 PM
#1
Your HP Elitebook 8470p runs on Legacy BIOS and UEFI, but the system displays options like "UEFI with CSM" versus "UEFI without CSM." The difference lies in whether the chipset supports Compatibility Mode Support (CSM). CSM enables better compatibility with older hardware and drivers, especially for legacy devices. If you need full support for older software or hardware, choose "UEFI without CSM." If you want improved performance and newer features, "UEFI with CSM" is recommended.
Reply
Reply
T
TheCCSampson
12-22-2016, 05:31 PM #1

Your HP Elitebook 8470p runs on Legacy BIOS and UEFI, but the system displays options like "UEFI with CSM" versus "UEFI without CSM." The difference lies in whether the chipset supports Compatibility Mode Support (CSM). CSM enables better compatibility with older hardware and drivers, especially for legacy devices. If you need full support for older software or hardware, choose "UEFI without CSM." If you want improved performance and newer features, "UEFI with CSM" is recommended.

Reply
Reply
B
Bahezz
Member
Find
201
12-22-2016, 07:04 PM
#2
CSM (Compatibility Support Module) allows you to start in old mode from HDD/SSD. It's useful when you have Windows installed on the MBR drive with a boot sector.
Reply
Reply
B
Bahezz
12-22-2016, 07:04 PM #2

CSM (Compatibility Support Module) allows you to start in old mode from HDD/SSD. It's useful when you have Windows installed on the MBR drive with a boot sector.

Reply
Reply
X
Xxunidemonxx
Member
Find
214
12-23-2016, 10:56 PM
#3
It extends beyond that but for a brief summary yes, this. In short, CSM enables devices built for BIOS to function in UEFI environments. A clear case is GPUs—those made before around 2012 won’t support UEFI output, so the UEFI BIOS must run with CSM enabled to make it work. On your laptop, there’s no need to turn on CSM.
Reply
Reply
X
Xxunidemonxx
12-23-2016, 10:56 PM #3

It extends beyond that but for a brief summary yes, this. In short, CSM enables devices built for BIOS to function in UEFI environments. A clear case is GPUs—those made before around 2012 won’t support UEFI output, so the UEFI BIOS must run with CSM enabled to make it work. On your laptop, there’s no need to turn on CSM.

Reply
Reply
D
DylanInSA
Member
Find
123
12-24-2016, 11:28 PM
#4
I believe it goes further than that. For instance, I can't share or view the post if I enable UEFI and I have an RTX 2070. Others with fresh GPUs faced similar issues, but I'm using Windows 10 on a M.2 NVMe SSD with MBR in legacy mode.
Reply
Reply
D
DylanInSA
12-24-2016, 11:28 PM #4

I believe it goes further than that. For instance, I can't share or view the post if I enable UEFI and I have an RTX 2070. Others with fresh GPUs faced similar issues, but I'm using Windows 10 on a M.2 NVMe SSD with MBR in legacy mode.

Reply
Reply
E
EpicSword55
Member
Find
213
12-26-2016, 07:25 PM
#5
Without the CSM, performance is better in my laptop case. However, based on the specs you provided, it has an AMD Radeon HD 7570m with 1GB of RAM and a 256GB SSD plus a 500GB HDD.
Reply
Reply
E
EpicSword55
12-26-2016, 07:25 PM #5

Without the CSM, performance is better in my laptop case. However, based on the specs you provided, it has an AMD Radeon HD 7570m with 1GB of RAM and a 256GB SSD plus a 500GB HDD.

Reply
Reply