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HP Recommended
HP EliteDesk 800 G3 Small Form Factor PC

Hello,

I am using an HP elitedesk 800 g3 sff which apparently only supports up to 7th gen intel processors. I am aiming to upgrade the CPU to something faster without needing to buy a new PC (although after this point I almost have). I have already upgraded the PSU to a 500W model mentioned in my previous post. And currently have a gtx 1650.

 

I am looking for a more modern HP motherboard that has newer gen intel CPU support and can fit inside a sff HP case. From what I’ve seen most sff motherboards have very similar outer dimensions.

 

I would be happy with a motherboard that supports 9th gen or newer (9th-13th).


you guys have been very helpful before, but am I aiming too high here?

many thanks, Freddie

1 ACCEPTED SOLUTION

Accepted Solutions
HP Recommended

@Friddle,

 

Welcome to our HP User Forum!

 

Did you ever come to the right Forum -this is it, my friend.

 

You better believe it: we aim to please, and we aim higher than everybody else, all right.

 

It so happened that I upgraded an HP EliteDesk 800 G3 (i7-7700K) to a G4 (i7-8700K) and then to a G5 (i7-9700KF --> i9-9900KF):

 

G3.) Solved: Upgrading HP EliteDesk 800 G3 SFF - HP Support Community - 8251218

G4.) Solved: Upgrading HP EliteDesk 800 G4 SFF - HP Support Community - 8523990

G5 Part I.) Solved: Upgrading HP EliteDesk 800 G5 SFF - HP Support Community - 8545942

G5 Part II.) Solved: Upgrading HP EliteDesk 800 G5 SFF Part II - HP Support Community - 8720291

 

You would be most interested in the last two links.  The best 9th-gen processors you can fit on a G5 SFF motherboard would be the i7-9700K / i7-9700KF or the i9-9900K / i9-9900KF.

 

Hope this was helpful.

 

Kind Regards,

 

NonSequitur777

 


View solution in original post

24 REPLIES 24
HP Recommended

@Friddle,

 

Welcome to our HP User Forum!

 

Did you ever come to the right Forum -this is it, my friend.

 

You better believe it: we aim to please, and we aim higher than everybody else, all right.

 

It so happened that I upgraded an HP EliteDesk 800 G3 (i7-7700K) to a G4 (i7-8700K) and then to a G5 (i7-9700KF --> i9-9900KF):

 

G3.) Solved: Upgrading HP EliteDesk 800 G3 SFF - HP Support Community - 8251218

G4.) Solved: Upgrading HP EliteDesk 800 G4 SFF - HP Support Community - 8523990

G5 Part I.) Solved: Upgrading HP EliteDesk 800 G5 SFF - HP Support Community - 8545942

G5 Part II.) Solved: Upgrading HP EliteDesk 800 G5 SFF Part II - HP Support Community - 8720291

 

You would be most interested in the last two links.  The best 9th-gen processors you can fit on a G5 SFF motherboard would be the i7-9700K / i7-9700KF or the i9-9900K / i9-9900KF.

 

Hope this was helpful.

 

Kind Regards,

 

NonSequitur777

 


HP Recommended

That is exactly what I wanted to hear. You’re a legend. 🙏

HP Recommended

@Friddle,

 

LOL! -Thank you for your vote of confidence, but the true legend in this Neighborhood is @Paul_Tikkanen!

 

Kind Regards,

 

NonSequitur777


HP Recommended

Thanks for the compliment @NonSequitur777 

 

But you reign supreme in the realm of HP business desktop upgrading!

HP Recommended

@Paul_Tikkanen,

 

Merely being obsessive-compulsive!

 

Illustrated also through my latest vehicular acquisition:

 

NonSequitur777_0-1690499465937.png

 

[EDIT:] Clarification: zero-to-60-mph in about 3 seconds flat is sort of bad@sshish.

 

Kind Regards,

 

NonSequitur777


HP Recommended

@NonSequitur777,

 

Hi, when upgrading the motherboard from the g3 to the g5 other than hardware is there anything that should be done?

Do I need to follow normal motherboard replacement rules and uninstall drivers and fresh install windows? Or are these motherboards close enough to each other for this not to be needed?

 

Many thanks, Friddle

HP Recommended

@Friddle,

 

That is a good question.

 

Before you swap out your G3 motherboard for a G5, back up your personal files on a secondary drive or external drive and create a bootable Windows 11 installation USB drive: Create installation media for Windows - Microsoft Support.

 

You swap the mobos, clean out the LGA1151 socket carefully with compressed ('canned') air, use your reader's glasses or a magnifying glass to inspect the LGA1151 socket for any obstructions or bend pins, install your CPU -use a quality thermal paste such as Arctic MX-4, install the CPU heatsink, install your drive(s) -preferably have an M.2 NVMe SSD as your primary (boot) drive, use the G3 RAM (or upgrade your RAM if it isn't 2666 MHz or faster), reinstall your PCIe Wi-Fi card (if you have one), etc. etc.

 

Once you got it all put together again, insert the bootable W11 USB stick, and access BIOS to boot from said USB stick to install W11.  The G5 motherboard should be associated with a unique Windows license, so the Windows installation shouldn't even ask for a license number.  If it does, just choose the "do it later" (or something like that) option.

 

Once W11 is installed, I would strongly recommend following these steps:

 

1.) Update W11 until Microsoft determines that there are no more updates available -make sure you also look under "Advanced options" --> "optional updates" and install it all.  You will have to endure a number of restarts/reboots.

 

2.) Run CMD (Command Prompt) as administrator and run these commands:

 

sfc /scannow

 

This may take a while to complete. For the next command, copy/paste/enter:

 

DISM /online /cleanup-image /restorehealth

 

This will take longer, play some Candy Crush or something else to kill the time.

 

3.) Download/install HP's Official HP® Drivers and Software Download | HP® Customer Support and allow this program to find and install as many updates as it can find -that would most likely also include to get you up to date with the latest BIOS version (V. 02.17.00, '20230327').

 

4.) Download/install Intel's Driver Update Utility https://www.intel.com/content/www/us/en/support/detect.html, and also allow this program to find and update as many updates as it can find.

 

This is from the top of my head, but if you run into something unexpected, you know where to find me.

 

Kind Regards,

 

NonSequitur777


HP Recommended

Hey thanks for the detailed reply.

 

If I am happy losing the data can I skip the backup to external drive? Most of my files are already uploaded to the cloud.

 

Also are there any major reason for a windows 11 install or is it okay if I install windows 10 instead?


this next section isnt HP or sff related:
Just to make sure I have a working pc while I’m upgrading this I want to fix my old gaming PC. It’s currently powering down after being left on for 2-10 minutes, the pc also has 100% disk usage. I suspect either the PCs bios is busted (me learning by tinkering) or the ssd is malfunctioning or both. This was caused a while ago as I tried to clone the data of one ssd onto another while trying to upgrade the ssd, I did this with an external ssd holder and when things didn’t work I tried to change the bios boot order. 
My plan to fix this is to replace the motherboard and ssd and fresh install windows. Do you think this should resolve the issues I’m facing or is there a chance it could be something else?

 

thanks for all the help.

many thanks, Friddle

HP Recommended

@Friddle,

 

1.) It is totally A-OK to skip the backup step -just added it because it is the responsible thing for me to mention it.

 

2.) Because on balance Windows 11 is faster and smoother than W10 -in my experience.  Especially during gaming.  But you can install whatever Windows version you want.

 

3.) Your plan to, and I quote: "to fix this is to replace the motherboard and ssd and fresh install windows" should almost certainly fix your issue.  At least, that is precisely what I would do.  There is, of course, always the chance that something else could pop up, but given the info you provided, your steps should cover it.

 

Kind Regards,

 

NonSequitur777


† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.