New GPU issues - Now PC won't boot

[MarkMenzies51]

I just installed my new 4090 and I can see power to the motherboard (RGB comes on for the Strix section) but when I hit the power button, it does nothing. I am replacing the old 3080 which has all 3 fans broken (will be replacing these and repurpose the GPU, much longer story there)

I have tried the following:
1. Checked the power connectors to the GPU
This one has an extension cable for the 16 PCIe power connections t needs, down to the "mini" 10 connections. All seem to be fine
2. Checked as many cables as I can see in case they were shaken loose when replacing the GPU
3. As the 4090 takes up more real estate anyways, I also removed the sound card and power cables. Power cables now tidied away on the back of the mobo
4. Pulled out and reinserted the PWR, RESET, LED etc connections from the mobo, in case these were nudged. All replaced back as per the mobo guide
5. The speaker cables are NOT connected cos they now seem to be broken. (I had a 4 pin connector with 2 wires going into what I assume to be a small speaker, the wires did not have a strong solder, as to be fair, its just a very small item, now they are broken. Will look to re solder these.

I have now removed all non essential items from the PC, ie GPU and tried again to boot. Again mobo lights up so I can see it having power, but nothing else.

Looking to the hive mind to see if anyone here can give me some pointers, else I smell a visit to a PC repair shop or look at options with PC specialist.

Any assistance would be appreciated.

TIA


Mark

 

[Martinr36]

Can youplease post the full spec from your orders page

 

[MarkMenzies51]

This is what I ordered.

I have removed the Sound card (there isnt enough room) and replaced the GPU with an MSI 4090 SUPRIM

Case	COOLERMASTER MASTERBOX TD500 MESH RGB GAMING CASE
Processor (CPU)	AMD Ryzen 9 3900XT 12 Core CPU (4.7GHz/70MB CACHE/AM4) Change to: AMD Ryzen 9 5950X 16 Core CPU (3.4GHz-4.9GHz/72MB CACHE/AM4)
Motherboard	ASUS® ROG STRIX X570-F GAMING (USB 3.2 Gen 2, PCIe 4.0) - ARGB Ready!
Memory (RAM)	32GB Corsair VENGEANCE RGB PRO DDR4 3200MHz (2 x 16GB)
Graphics Card	10GB NVIDIA GEFORCE RTX 3080
1st M.2 SSD Drive	1TB SAMSUNG 970 EVO PLUS M.2, PCIe NVMe (up to 3500MB/R, 3300MB/W)
2nd M.2 SSD Drive	500GB SAMSUNG 970 EVO PLUS M.2, PCIe NVMe (up to 3500MB/R, 3200MB/W)
1st Storage Drive	2TB Samsung 870 QVO 2.5" SSD, SATA 6Gb/s (up to 560MB/sR | 530MB/sW)
DVD/BLU-RAY Drive	NOT REQUIRED
Power Supply	CORSAIR 850W RMx SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET
Power Cable	1 x 1 Metre UK Power Cable (Kettle Lead)
Processor Cooling	Corsair H115i RGB PLATINUM Hydro Series High Performance CPU Cooler
Thermal Paste	ARCTIC MX-4 EXTREME THERMAL CONDUCTIVITY COMPOUND
LED Lighting	2x 50cm ARGB LED Strip
Sound Card	ASUS STRIX Raid Pro 7.1 PCIe sound card
Network Card	10/100/1000 GIGABIT LAN PORT (Wi-Fi NOT INCLUDED)
Wireless Network Card	10/100/1000 GIGABIT LAN PORT (Wi-Fi NOT INCLUDED)
USB/Thunderbolt Options	MIN. 2 x USB 3.0 & 2 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS
Operating System	Windows 10 Professional 64 Bit - inc. Single Licence [MUP-00003]
Operating System Language	United Kingdom - English Language
Windows Recovery Media	Windows 10 Multi-Language Recovery Image - Unlimited Downloads from Online Account
Office Software	FREE 30 Day Trial of Microsoft 365® (Operating System Required)
Anti-Virus	NO ANTI-VIRUS SOFTWARE
Browser	Google Chrome™

 

[SpyderTracks]

Check the CPU power connector to the board.

Fully disconnect it and reconnect it.

And sorry to ask, but just to confirm, you did switch off the PSU power or disconnect it from the mains before working on it?

Did you have any overclock applied on the previous GPU?

You'll need to explain how the fans got damaged on the previous GPU as well?

 

[MarkMenzies51]

Yup and yup.

The CPU has power cos the RGB cover lights up on the top right of the mobo. So I know that power is getting to the mobo. RAM RGB does not light up though, I would assume its a symptom of the lack of boot for the PC.

When I had keyboard and mouse connected, they all lit up as well, so they did see some power too.

It looks like something that changed since I disconnected the old GPU and the sound card and I will be buggered if I can find out what that is.

Later today, I will have a look at reinserting the PWR BUTTON/RESET SW/LED connections for the front panel again, in case these need a fresh connection.

Is there any other way to try to boot without the use of the PWR button on the case?

 

[SpyderTracks]

The CPU has power cos the RGB cover lights up on the top right of the mobo. So I know that power is getting to the mobo.

CPU power and Mobo power are 2 different things supplied by 2 different connectors. You need to remove the CPU power connector and replace.

The mobo gets power, we know because of the lights, when a boot fails to occur, it's usually either because the CPU isn't getting the voltage burst from the PSU, or because the motherboard or CPU are fried.

Or are you saying it is booting and fans are running, but there's no display? From your description it sounded like the power up was not doing anything?

We really need the PC speaker reattached to give boot codes.

 

[MarkMenzies51]

I get it now, thanks. Will check

PC speaker is not going to be a goer until I can find my old soldering kit, but will see what I can get.

Also just tried to jump the PC by removing the power switch connectors and just trying to "jump" the pins, no joy.

One thing though, I have an 850W PSU. I know the 4090 uses 32 PCIe power connectors, the old 3080 used 8, so I do have a two fold increase in power pull, but I did also remove a sound card that used 6. I got the 850W cos it was it was more than I needed, thinking that I may want to add stuff in later. Can I check if I do indeed have enough power for everything? Is there a calculator somewhere? Note, that doesn't help me at the moment cos I have everything disconnected and removed.

 

[SpyderTracks]

PC speaker is not going to be a goer until I can find my old soldering kit, but will see what I can get.

You can just buy one for a 5er off amazon

https://www.amazon.co.uk/CCYLEZ-Mainboard-Computer-Internal-Connector-default/dp/B09VDRX3SB/ref=pd_lpo_1?pd_rd_w=HxYq7&content-id=amzn1.sym.2d229339-2f42-4596-a90d-b81a4f52d6d3&pf_rd_p=2d229339-2f42-4596-a90d-b81a4f52d6d3&pf_rd_r=EE3V7W5G7BMECVXATQQP&pd_rd_wg=IDqcX&pd_rd_r=7aa0ccee-f5b0-4b6d-b0ad-09c3b3c75a0f&pd_rd_i=B09VDRX3SB&psc=1

One thing though, I have an 850W PSU. I know the 4090 uses 32 PCIe power connectors, the old 3080 used 8, so I do have a two fold increase in power pull, but I did also remove a sound card that used 6. I got the 850W cos it was it was more than I needed, thinking that I may want to add stuff in later. Can I check if I do indeed have enough power for everything? Is there a calculator somewhere? Note, that doesn't help me at the moment cos I have everything disconnected and removed.

It should still boot, at boot it will only require about 250w max as the GPU isn't kicking in. It's only when you utilised it for something like gaming that it would access the GPU power.

But yes, for me 850w is too low for that card.

 

[Zaheen]

Your 850W PSU is more than enough - that isn't the issue unless it's broken. There's a way to test that on it's own by using a paper clip - check out some YouTube tutorials.

Are you getting any motherboard LEDs? Orange > Red > White > Green - are you seeing any at all?

Have you tried re-seating the RAM?

It's a shame you don't have another GPU to test in your PC, or another PC in which you can test the GPU. You say all the fans are broken in your 3080 but even that is strange - all the fans died at once, instantaneously?

 

[MarkMenzies51]

I have checked a couple of PSU calculators and they all seem to say I am within thresholds, they seem to agree on around 740w when I add the sound card back in and all the RGB strips.

Have reseated the RAM etc as well and no change.

No lights on the mobo at all, other than the RGB over the ports, so not sure if perhaps something catastrophic has happened to the mobo.

Seems I will need to call PCS tomorrow and see if they can help. I do have labour warranty, but the parts cover expired.

Anyone got any insights to lead times for the transport and then resolution please?

TIA

Mark

 

[SpyderTracks]

Anyone got any insights to lead times for the transport and then resolution please?

Not certain, perhaps around a month, that's a pure guess though. Transport is next day if your warranty includes return to base shipping, if not, then whatever service you choose to use.

I would suggest at this point an RMA is probably a good idea.

 

[Zaheen]

I just installed my new 4090 and I can see power to the motherboard (RGB comes on for the Strix section) but when I hit the power button, it does nothing. I am replacing the old 3080 which has all 3 fans broken (will be replacing these and repurpose the GPU, much longer story there)

I have tried the following:
1. Checked the power connectors to the GPU
This one has an extension cable for the 16 PCIe power connections t needs, down to the "mini" 10 connections. All seem to be fine
2. Checked as many cables as I can see in case they were shaken loose when replacing the GPU
3. As the 4090 takes up more real estate anyways, I also removed the sound card and power cables. Power cables now tidied away on the back of the mobo
4. Pulled out and reinserted the PWR, RESET, LED etc connections from the mobo, in case these were nudged. All replaced back as per the mobo guide
5. The speaker cables are NOT connected cos they now seem to be broken. (I had a 4 pin connector with 2 wires going into what I assume to be a small speaker, the wires did not have a strong solder, as to be fair, its just a very small item, now they are broken. Will look to re solder these.

I have now removed all non essential items from the PC, ie GPU and tried again to boot. Again mobo lights up so I can see it having power, but nothing else.

Looking to the hive mind to see if anyone here can give me some pointers, else I smell a visit to a PC repair shop or look at options with PC specialist.

Any assistance would be appreciated.

TIA


Mark

Care to explain that a little more? Got a picture?

The 4090 are using the NVIDIA adapter into 4 x 8-pin PCIe connectors. How many are you using from your PSU?

 

[MarkMenzies51]

Care to explain that a little more? Got a picture?

The 4090 are using the NVIDIA adapter into 4 x 8-pin PCIe connectors. How many are you using from your PSU?

All of them from that cable from the PSU. I have 32 on that cable, I used them all.

I did use the 32 into a single, smaller, 10 connector plug.

AFAIK, I can consume all connectors from a PSU with no issue, its kinda why they are there. Not aware of any oversubscription logic I need to be mindful of.

Also doesnt explain why even with the GPU out and all other cards/connections out the PC wont boot.

The enigma continues.

M

 

[Zaheen]

All of them from that cable from the PSU. I have 32 on that cable, I used them all.

I did use the 32 into a single, smaller, 10 connector plug.

AFAIK, I can consume all connectors from a PSU with no issue, its kinda why they are there. Not aware of any oversubscription logic I need to be mindful of.

Also doesnt explain why even with the GPU out and all other cards/connections out the PC wont boot.

The enigma continues.

M

Morning d00d.

It is NOT going to boot without a CPU with integrated graphics - that does explain why it's not booting.

Thank you for explaining you have filled the 4 x 8-pin PCIe connectors into the adapter, but I wanted to know how much 8-pin PCIe cables are coming out of your PSU. Are you using two, or all three available? Since you only have three, one must be a pigtail connection.

It not booting could be anything at this stage, but if your GPU isn't getting enough power then it won't boot at all - so double check to make sure you're giving it as much as you can.

When you say you're replacing your previous GPU with all the fans broken - did you actually test it in another PC?

 

[Scott]

850w should be just about enough thanks to the AMD platform. Even if it wasn't, it would still boot as you won't get a huge spike upon booting. You would likely only see issues when pushing the GPU to its max. The big issue with lower PSUs is the power spikes that are becoming notorious.

PSUs, unfortunately, are not made equal. The maximum power on the label doesn't even tell half the story. Fortunately the RMx is a high end Gold PSU that should be able to just about handle the 4090. We would never recommend this PSU in a build with the 4090, but we would previously as headroom for future builds (as you have done). Even with the 3080 we would have likely recommended the 1000w RMx, but that's done now.

In your shoes I would remove the GPU and try to turn the system on. It will give an error as you don't have the GPU in place. If you get the error, it's either an issue with the GPU or the power supply to the GPU. If you don't get an error, it's time to investigate further. For this, I would remove absolutely every connector on the board. I would then connect the motherboard ATX power supply and the PCie supply for the CPU. Plug in your H115i to the board as well (fan indicator, almost forgot this). I would put the power switch to the chassis back on the board and then attempt to switch the system on. At this point, you should still get the GPU error, but if it doesn't get that far then something else is wrong. The most likely culprite is the supply, but the power switch could be at fault too. You can bypass this by VERY CAREFULLY shorting the power pins with a small screwdriver. This is the same as actuating the switch.

Even without the internal speaker you will know if the PC is switching on (or attempting to) with the fans coming on.

 

[MarkMenzies51]

Hi bud

I do have some spare power connectors from the PSU. There are multiple bundles of connectors from my PSU and basically I usel all 32 of the connectors from 1 bundle. For the 4090, it came with a concentrator cable (or whatever they call it) to take the 4x 8 connector (total 32) and concentrate then in a single 10 connector plug, smaller format, for the GPU.

Old GPU must have gotten petty warm and all 3 fans are broken, ie they fell off never to spin again (unless I launch them out a window). I will be looking to get new fans and replace these. GPU itself I think is fine, cos before I got the new GPU, my PC would boot fine and I could browse the web etc, all good. Its just that as soon as I started a game, GPU resources were being used and as I had no fans to cool it down, the temp raised and caused the GPU to shut down. A reset on the PC would bring it back, only until the GPU overheated again

It is NOT going to boot without a CPU with integrated graphics - that does explain why it's not booting.

Not sure what you mean here. The CPU is pretty high end (or was when I bought it in 2020) and I have display port and HDMI on the mobo, which implies that I can use integrated graphics. Is that not the case? You saying I need the GPU installed for me to try and boot?

 

[Zaheen]

Hi bud

I do have some spare power connectors from the PSU. There are multiple bundles of connectors from my PSU and basically I usel all 32 of the connectors from 1 bundle. For the 4090, it came with a concentrator cable (or whatever they call it) to take the 4x 8 connector (total 32) and concentrate then in a single 10 connector plug, smaller format, for the GPU.

Old GPU must have gotten petty warm and all 3 fans are broken, ie they fell off never to spin again (unless I launch them out a window). I will be looking to get new fans and replace these. GPU itself I think is fine, cos before I got the new GPU, my PC would boot fine and I could browse the web etc, all good. Its just that as soon as I started a game, GPU resources were being used and as I had no fans to cool it down, the temp raised and caused the GPU to shut down. A reset on the PC would bring it back, only until the GPU overheated again


Not sure what you mean here. The CPU is pretty high end (or was when I bought it in 2020) and I have display port and HDMI on the mobo, which implies that I can use integrated graphics. Is that not the case? You saying I need the GPU installed for me to try and boot?

The 5950X has no integrated graphics and therefore the Display Port and HDMI connectors on your motherboard will do nothing. It won't even boot up either as graphics are needed to boot.

Back to my original question. Your Power Supply will have THREE seperate PCIe 8-pin ports for your GPU. Each cable that comes from the PSU has two PCIe 8-pin connectors that can insert into your GPU. Now this might be fine, just using two...

But if it was me I'd really want to dig out your spare GPU PCIe 8pin cable from your Power Supply spare pouch, put it into your PSU so you have a total of three separate cables (with a total of SIX 8-pin PCIe connectors) available. You want to use at least one connector from each cable, and then use any spare one remaining so you have two dangling ones spare leftover.

Do you follow me, or are you confused a little bit?