2nd RAM Slot not working

[Lego123]

I'm having problem with the 2nd RAM slot of my HP Pavilion 590. I have tested both 2x8GB RAMs and they work as fine. The problem is when I insert the 2nd RAM to the 2nd RAM slot. The computer doesn't boot and gives 3 long & 3 short beeps. But If I only use the 1st RAM it works fine. I don't know what the issue is, I already tried reseating the CPU but same results. Any help will be appreciated. Thanks

[BeemerBiker]

According to Kinston memory finder the memory needs to be 1Rx16  (single rank)

https://www.kingston.com/en/memory/search/model/98474/hp-compaq-pavilion-590-p00xxx

look at your memory modules for the 1Rx16.  If not there take a picture of both sides and post it here.

Did the system come with a single 8gb and you bought a second, matching one?

Install CPU-z and look at the SPD and MEMORY dialog boxes.  I suspect the system sees the single 8gb as taking up two slots.

https://www.cpuid.com/softwares/cpu-z.html

You might verify that you have the latest bios update

https://support.hp.com/us-en/drivers/selfservice/hp-pavilion-desktop-pc-590-p0000a/19390500/model/22...

there are 3 bios listed but you will need to confirm the "rom" version to get the correct bios of the two "rom" listed.

[Prométhée]

hi

" The computer doesn't boot and gives 3 long & 3 short beeps."

no doubt ? strange because it indicates a graphics problem more often than not

HP Desktop PCs - Computer Does Not Start and Emits an LED or Beep Code | HP® Customer Support

although I do not recommend updating the bios, before checking if it is not a compatibility problem, there should be no doubt about the version of the bios!

HP Pavilion 590-p0032d 

• Amount: 4 GB
• Speed: PC4-21300 MB/s
• Type: DDR4-2666
•  

Lincs motherboard specifications.

• HP name: Lincs
• SSID: 843B

HP Consumer Desktop PC BIOS Update (ROM Family SSID 843B)

F.44 Rev.A

-Provide 20Q2 security enhancement update. ??

personally I prefer to warn you, because we have too many problems reported, following a failed bios update
and it may not change your problem.