Question Issues with upgrading to a Ryzen 9 5900X ?

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sophimoo

Dec 29, 2024
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Hello, first time posting so please let me know if I'm doing something wrong,

Specs:

MBD: Gigabyte B350-DS3H
GPU: RTX 3060
CPU: Ryzen 7 2700X -> Ryzen 9 5900X
PSU: MEDION HK650-11PP 550w
RAM: 24GB of assorted sticks

So I suspect that the issue lies with the fact that my PSU only has a 4-pin connector for the 8-pin socket.
This worked with the 2700X but I guess the 5900X doesn't work with this? I don't have another board to test this.

Things I've tried:
- Cleared the CMOS
- Tried various combinations of ram in all slots
- the 2700X does work when it is returned to the slot and the PC boots as expected
- BIOS is updated to a supported version

When it does boot I do get USB power to the keyboard and mouse. And occasionally my monitor will turn on but there's no signal.

I just want some form of confirmation that this is probably the PSU and I need to give it an 8-pin but if there's anything else to try I'd like to know.
 
I would not consider using the 5900X with that motherboard. Even if it did boot, the VRM are going to be severely overtaxed.

In this case it is suggested to return that CPU and consider moving up to AM5 or something on a new platform. Even if you got a better motherboard, you will likely need a more suitable power supply as well. At that point there is no real reason to consider staying AM4. I wouldn't do anything higher than ~ 5600X on that mobo/PSU combo. (if it will even work without the other CPU P connector)

edit- other issue is waiting to be that "assorted" RAM combo
 
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punkncat said:
I would not consider using the 5900X with that motherboard. Even if it did boot, the VRM are going to be severely overtaxed.

In this case it is suggested to return that CPU and consider moving up to AM5 or something on a new platform. Even if you got a better motherboard, you will likely need a more suitable power supply as well. At that point there is no real reason to consider staying AM4. I wouldn't do anything higher than ~ 5600X on that mobo/PSU combo. (if it will even work without the other CPU P connector)

edit- other issue is waiting to be that "assorted" RAM combo
Click to expand...
You're probably right but I got the 5900X for a rly good deal on a pricing error on amazon, my plan was to underclock the 5900X so I wouldn't really be using it to its full powerdraw ever

edit: also im not moving to AM5 thats gonna cost like 500+ for ram+motherboard+cpu which I'm not willing to spend right now
 
you can try it with just a single stick of ram and see if it boots. that might be part of the problem. if it works with one stick, then you can add one and see if it works with 2 and so on.

however, your psu is def a problem even if it does boot. the 5900x can use more power than the 4-pin can provide so it will throttle quickly when you try to fully get it going.
 
Math Geek said:
you can try it with just a single stick of ram and see if it boots. that might be part of the problem. if it works with one stick, then you can add one and see if it works with 2 and so on.

however, your psu is def a problem even if it does boot. the 5900x can use more power than the 4-pin can provide so it will throttle quickly when you try to fully get it going.
Click to expand...
Tried with one stick in all slots, using XMP and non XMP compatible memory, same result, I do think its the PSU
 
Upgrading to a 5900X with a cheap PSU and the wrong motherboard, this is your mistake.
Change the PSU to one with a good brand name and gold, and a better mb with better vrm.
 
triplex1 said:
Upgrading to a 5900X with a cheap PSU and the wrong motherboard, this is your mistake.
Change the PSU to one with a good brand name and gold, and a better mb with better vrm.
Click to expand...

Do I need a better VRM if I'm going to undervolt it? I thought I had upgraded the PSU its kinda a miracle it survived the 3060 upgrade
 
punkncat said:
I would not consider using the 5900X with that motherboard. Even if it did boot, the VRM are going to be severely overtaxed.

In this case it is suggested to return that CPU and consider moving up to AM5 or something on a new platform. Even if you got a better motherboard, you will likely need a more suitable power supply as well. At that point there is no real reason to consider staying AM4. I wouldn't do anything higher than ~ 5600X on that mobo/PSU combo. (if it will even work without the other CPU P connector)

edit- other issue is waiting to be that "assorted" RAM combo
Click to expand...
they're all 3600mhz and support some form of XMP, this computer was originally OEM so theres a bunch of unbranded/bottom of the barrel stuff
 
CPU-Power-Connector-4-pin...... you need one more Connector-4-pin
your mb It's not for this processor, find a good 550, I had tested it for quite some time on an Ashrock b550m and it was doing great.
I also see wrong in the memories, even though they have the same frequency, but that doesn't matter that much.
The first thing that matters is the power supply.
 
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sophimoo said:
You're probably right but I got the 5900X for a rly good deal on a pricing error on amazon, my plan was to underclock the 5900X so I wouldn't really be using it to its full powerdraw ever

edit: also im not moving to AM5 thats gonna cost like 500+ for ram+motherboard+cpu which I'm not willing to spend right now
Click to expand...

The issue that is starting to creep up is that decent AM4 motherboards are priced beyond their worth in many cases. AM4 is dead end no matter how you slice it, so it really isn't worth paying a premium for a great motherboard for that use case. The other issue is that as time continues marching on you have a CPU that unless you are doing a lot of thread intensive workloads this isn't going to help with most day to day use over something in the R5 arena for 7xxx or particularly 9xxx. Good price or not, now you are on the back foot trying to find outdated parts to shoe horn force it to fit.

IMO, be patient while watching out for decent used motherboards with a return window and a decent new power supply with the proper power, rating, and connectors. Oh, and a good matching set of proper RAM too. (Thus, the AM5 suggestion)
 
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The main problem is in the power supply which requires a second 4-pin connector.
From there on out, if nothing else changes, the system will work and the 5900x is a processor that doesn't get stuck anywhere and doesn't need to go to another generation of processors.
 
there's still some decent mobo's out there for AM4 that are not priced too bad. these are pretty much where they have always been and each can handle a 5900x easily enough. at most it might hit 150w which is not that much for heavy use. sure you can torture test it higher but that's not day to day use.


the psu is main concern for sure as everyone seems to agree :) then get that better mobo and you'll be good to go for a long time. we'll be on AM6 before you need to upgrade. lol
 
punkncat said:
The issue that is starting to creep up is that decent AM4 motherboards are priced beyond their worth in many cases. AM4 is dead end no matter how you slice it, so it really isn't worth paying a premium for a great motherboard for that use case. The other issue is that as time continues marching on you have a CPU that unless you are doing a lot of thread intensive workloads this isn't going to help with most day to day use over something in the R5 arena for 7xxx or particularly 9xxx. Good price or not, now you are on the back foot trying to find outdated parts to shoe horn force it to fit.

IMO, be patient while watching out for decent used motherboards with a return window and a decent new power supply with the proper power, rating, and connectors. Oh, and a good matching set of proper RAM too. (Thus, the AM5 suggestion)
Click to expand...
Yeah, I would have like to have gone with a different CPU but the deal was rly compelling, I never planned to run it at full power thats why im not so concerned with the VRM, I have a low profile noctua cooler, it couldn't even cool the 105w tdp of the 2700x.

The ram works? memtest86 doesn't give me any problems so im happy.

I'm glad to see that the consensus is that its the powersupply, im going to look for a ~700 Watt one with a silver or gold, anythings better than what I have right now probably.
 
Math Geek said:
there's still some decent mobo's out there for AM4 that are not priced too bad. these are pretty much where they have always been and each can handle a 5900x easily enough. at most it might hit 150w which is not that much for heavy use. sure you can torture test it higher but that's not day to day use.


the psu is main concern for sure as everyone seems to agree :) then get that better mobo and you'll be good to go for a long time. we'll be on AM6 before you need to upgrade. lol
Click to expand...
Yeah I'm quite stubborn with upgrades, on another system I manage I kept it to DDR3 until recently so I wouldn't be surprised if this lasts me till AM6

Hopefully its the powersupply, ryzen is always puzzling to me
 
sophimoo said:
Yeah I'm quite stubborn with upgrades, on another system I manage I kept it to DDR3 until recently so I wouldn't be surprised if this lasts me till AM6

Hopefully its the powersupply, ryzen is always puzzling to me
Click to expand...
Find and get a gold one with 2 CPU connectors (8pin) and it will work as is.
 
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