X51 R2, is acting weird

I think one beep on this system means a mobo failure or BIOS error.  You can try clearing cmos by unplugging, removing the cr2032 coin cell battery, discharging flea power, and replacing with a new one if possible.  But that probably wouldn't fix random restarts.  There may be multiple issues.

Here’s a list of stuff you need.

CMOS:

https://www.amazon.com/Assembly-Battery-Alienware-Andromeda-0J313/dp/B07X7JY5K1/ref=sr_1_2?dchild=1&keywords=CMOs+battery+x51&qid=1595985640&sr=8-2

SSD:

https://www.amazon.com/Samsung-Inch-Internal-MZ-76Q1T0B-AM/dp/B07L3D19MY/ref=sr_1_4?dchild=1&keywords=1Tb+SSD+2.5&qid=1595985742&sr=8-4

GPU:

https://www.amazon.com/Gigabyte-GeForce-Graphics-Compact-GV-N1656OC-4GD/dp/B086TSK5M3/ref=sr_1_3?dchild=1&keywords=GTX+1650&qid=1595985890&sr=8-3

Power Supply:
https://www.amazon.com/330W-19-5V-16-9A-Power-Adapter/dp/B073LZHX5P/ref=sr_1_4?dchild=1&keywords=330+watt+psu&qid=1595986126&sr=8-4

Get all these and you’ll have a brand new X51.

 Tell me your model number so I can provide your drivers.

It took me a long time to get it work but I got it working now and there’s one more issue. The boot logo is not correct and the boot screen is stretched it’s a red alien head wallpaper instead of a Alienware logo with a white alien head next to it

Did you change the secure boot settings? Try enabling secure boot.

It’s on but it’s still 

Yeah, that's just a different bios post image.  From my understanding there's two ways to get that older image:  

1.  Using Legacy bios mode.  Legacy vs. UEFI show different images.  Legacy has the older alien head image. 

2.  You would also get older image if you toggle off secureboot. 

Are you in Legacy Bios?  

It was on legacy, how to change back to uefi?

Its gotta be in legacy as It can still be in secure boot but with legacy or vice versa.

reset the bios to its defaults.

It's not as simple as resetting back to uefi.  Doing so could potentially render your pc unbootable.  Especially if you aren't on win 10.  Uefi (and partition style, legacy requires mbr) is set when you install the OS and initialize the drive.  One way to switch to UEFI is to reinstall the OS. You can also convert.  You should backup your system before a conversion.  But I wouldn't go through the effort just to change the post image.  There are some other differences like the 2tb boot drive partition limit in mbr but if they aren't limiting you I'd leave good enough alone.

Yeah sorry for not mentioning that.

MBR can read up to 2Tb and is recommended on BIOS based systems.

MBR VS GPT

Maximum Partition capacity: 2Tb vs 9.4Zb

Firmware interface support:BIOS vs UEFI.

that is it, i am not my pc anymore and i will be getting a new pc. Other then that, thanks for your help

Id not recommend getting a new PC as i would just reset the BIOS to its defaults and then Try to use the computer as a Home Theater PC instead?

I use mine with the 4790K config and a 1660Ti with the 330watt psu and 16gb of ram with a Blu-ray drive.

But its your personal decision to decide if you want to buy a new computer.

Ha! Fixed it without losing my data

Yes