New GPU and CPU installed - Crippled PC

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Hi all. After some advice. Yesterday I installed a RTX 4070 super and a Ryzen 7 5800x3d into my son’s gaming PC….. as you can imagine he’s hoping for stellar performance.

I initially made a mistake by just taking out the old CPU (3600) from the B550 motherboard and bunging the new CPU in….. a bit of research gave me the answer to no boot…… re-installed the old CPU and flashed the BIOS…. Then back in with the new CPU and it booted.

PC seems to be working on the surface. It’s just everything is super slow. Any program takes ages to load, sometimes doesn’t, so I restart, some of his online multiplayer shooter show poor WiFi signal and packet loss when our WiFi is really excellent. Basically stuff that has never happened in the last 3 years when his PC worked brilliantly.

Can any of you shed any light on this? Is there something I’m meant to do? Nothing has changed apart from a better GPU and CPU, which has given us a real slow laggy PC!
 
Thanks for the speedy reply.
Did I do the chipset drivers and whatnot? As I have no clue what you’re on about, I’d guess no!!!! Will look at that right now. Also did not clear the CMOS….. will do that too now.

No cables or devices removed. But I could have knocked something as there is a mass of cables in the back….. will check.
 
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Will also look in events viewer.

No did not do fresh windows install. Plus old card was AMD 5600xt. And no did not uninstall the old driver….. what should I do now? Will DDU work with the new nvidia card installed?
 
So far so good. I’ve been convinced to stop “messing” with the PC now as there’s a Fortnite tournament going on…….

But things are looking sharp and quick and I’m rather hopeful that the nuclear full re-install is the way forward.

Many thanks for all your help. You’ve all been really useful in getting me straight on what was needing doing
 
Would you believe after my initial jubilation after the fresh windows install that all was fine - a week later back in that same sticky situation.

Here are some symptoms:

Display flickers randomly approx once every 10-20 seconds. Makes a click as it does it

Whole system is slow. Ages to load programs, super sluggish

Double/triple key strokes when typing. Even with different keyboards

Games have internet problems with massive packet loss even though internet is fast and solid for every other PC and device.

Here’s what I’ve done

Removed AMD GPU drivers, used driver removal tool

Fresh windows install

New most recent BIOS update

Checked/reinstalled most up to date Nvidia GPU driver.

All the above was done and worked initially….

Just swapped back to the old AMD 5600XT GPU and have same issues

Could it be the new CPU? Should I change that back too?
 
Noting of note running in task manager

Haven’t run malware bytes yet as I did a clean install. Which I’m currently doing right now as this is what fixed last time. One bonus is my son’s PC is bare bones. Just his games on and nothing more!

I shall look at time spy in a bit. Once the fresh install is done if still the same.
 
Here’s a thing…… possibly starting to narrow the issue down.

My son is back from school and has been testing the fresh install I’ve done, which appears to have worked. He is playing Fortnite and has mentioned it looks like it’s on 60hz (god knows how he sees this!). Went to nvidia control panel and it was. If I set to 144hz which his monitor is, he can play for a few mins with smooth motion before massive packet loss kicks in. This does not happen if left on 60hz.

His old AMD 5600xt happily banged out 144hz no problem for years.for info he has an iiyama ultrawide 144hz monitor.

Any idea what could be going on here?
 
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As for scientific process of elimination, I have tried old gpu with new CPU, but as yet not put the old CPU back in.

And yes, changing the refresh rate messes with the game in respect to packet loss. Never happened before and 144hz worked fine. Now if I set to 144hz I get a packet loss warning and the ping increases from the usual excellent 10-30 to around 70+. The game plays very badly. WiFi antennae are fine. Clearly shown by no issues when set to 60hz.
 
There can’t be any programs interacting badly here - such as the mentioned ASU’s Armoury Crate. There is not much on the PC. Avast one is the only thing worth mentioning. But I have always used this - and can’t see why the 144hz causes a problem in that way.
 
Can’t really disable WiFi as I don’t have an Ethernet cable long enough. But doing Speedtest gets 270mbs and 20ping. Everything works a treat till I set 144hz. Which is why I ruled out interference. Nothing has changed in this system location.
Using display port not HDMI. Same one as before.
Will try v-sync.
Yes games blasting 3-400fps.
 
Going to do the scientific approach tomorrow. Start off by reverting the whole shooting match back to stock ryzen 5 3600 and amd 5600xt. Then change the CPU first…. Test…… then the GPU….. test…..
PITA!
 
Before I reply to Tetras and Dreadi, I have taken out the 4070 super and put back in the rx5600. Problem solved. 144hz, no screen flicker, no packet loss….. nothing. Perfect as it was all morning.

So before I try home plugs or a long Ethernet cable, I’m wondering if there is a point? This card is not playing ball….. it has to go back.

My only thoughts now is perhaps it’s this particular manufacturer or maybe just this whole series of Nvidia cards?

Should I get another? Should I abort and go AMD?!!!
 
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