GPU not detected

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TerryChan479

New member
I received my order for a liquid series PC recently. It has a RTX 4090 GPU on a ROG STRIX Z690-F motherboard. However, the GPU wasn't being detected.

Here are the symptoms:
- I could only boot the PC with the monitors connected to the iGPU through the HDMI/DP on the motherboard. If I only connect to the dGPU, I get a white LED (VGA error) on the motherboard and it doesn't boot.
- The GPU is not shown on Windows Device Manager.
- I cannot install a driver because the installer says there is no NVIDIA device.
- In the BIOS, PCIEx16_1 (where the GPU is connected to) is shown as "Not present".
- Reseating the GPU did not help.
- Changing the PCIEx16 mode from Auto to Gen4 or Gen3 did not help.
- Resetting BIOS / CMOS did not help.
- Presumably the GPU got enough power from the PSU, because there is no warning light on.
- When another (cheap) GPU is plugged into the same PCIe slot, it gets power from the board for its fan, but is still not detected.

Any idea what is at fault and what I can do to fix? I know it looks grim, but I am really hoping that there is still something I can try, before having to send this gigantic 50kg beast back (it's a Thermaltake Tower 900), which is gonna cost both me and PCS a lot of time and money...
 
T

TerryChan479

New member
Sure.

Case THERMALTAKE TOWER 900 VERTICAL CASE FOR GAMING - FULL TOWER
Custom Liquid Cooling KitLiquid Series RGB High Kit - EK
TubingClear Hardline PETG (with bend/black fittings)
Graphics Card CoolingGPU Water Cooling - For One Graphics Card!
Coolant ColourMayhems X1 UV Pink
LED LightingRGB led-strip 50 cm
Processor (CPU)Intel® Core™ i9 24 Core i9-13900K (3,0 GHz) 36 MB cache
MotherboardASUS® ROG STRIX Z690-F GAMING WIFI (LGA1700, USB 3.2, PCIe 5.0) - ARGB capable!
Memory (RAM)32 GB Corsair VENGEANCE DDR5 4800MHz (2 x 16 GB)
Graphics Card24 GB ASUS TUF GEFORCE RTX 4090 - HDMI, DP
1st M.2 SSD Drive1 TB SAMSUNG 980 PRO M.2, PCIe NVMe (maximaal 7000 MB/R, 5000 MB/W)
1st Storage Drive4 TB SEAGATE BARRACUDA SATA-III 3,5" HDD, 6 GB/s, 5400 RPM, 256 MB CACHE
Power SupplyCORSAIR 1000 W RMx SERIES™ MODULAIR 80 PLUS GOUD, ULTRA QUIET
Power Cable1 x power cable of 1,5 meter for Europe
Thermal PasteARCTIC MX-4 EXTREME THERMAL CONDUCTIVITY COMPOUND
Sound CardONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)
Network Card10/100/1000 GIGABIT LAN-POORT
Wireless Network CardNOT REQUIRED
USB/Thunderbolt OptionsMIN. 2 x USB 3.0 & 2 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS
Operating SystemWindows 11 Pro 64 Bit - inc. single license
Operating System LanguageUnited Kingdom - English
Windows Recovery MediaWindows 10/11 Multi-Language Recovery Image - Unlimited Downloads from Online Account
Office SoftwareFREE 30 days Trial of Microsoft 365® (Operating System Required)
Anti-VirusNO ANTI-VIRUS SOFTWARE
BrowserMicrosoft® Edge
WebcamMicrosoft LifeCam HD-3000
Warranty3 Year Gold Warranty (2 Year Collect & Return, 2 Year Parts, 3 Year Labour)
Delivery2 DAYS INSURED DELIVERY BY PALLET TO NETHERLANDS
Build TimeLiquid Series® Build - 11 to 13 business days
Welcome BookPCSpecialist Welkomstboek - Nederland
 
Martinr36

Martinr36

MOST VALUED CONTRIBUTOR
I'd check all the connections, at both GPU and PSU ends, also can you post a photo of the power cables going in to the GPU
 
T

TerryChan479

New member
Here are photos of the power cables going into the GPU:

At the PSU end, I can't really reach it without taking things apart. I might try to figure out how to do it safely later on. Meanwhile, taking these photos is all I could do:

All other connections on the motherboard seem secured. (I pulled them out, brushed off some dust in any, and replugged them.)
 
SpyderTracks

SpyderTracks

We love you Ukraine
TerryChan479 said:
Here are photos of the power cables going into the GPU:

At the PSU end, I can't really reach it without taking things apart. I might try to figure out how to do it safely later on. Meanwhile, taking these photos is all I could do:

All other connections on the motherboard seem secured. (I pulled them out, brushed off some dust in any, and replugged them.)
Click to expand...
If you're sure the PCIe cables are properly inserted at the PSU end, then I'm afraid it sounds like complete failure of the GPU unfortunately.
 
SpyderTracks

SpyderTracks

We love you Ukraine
IRLRobinS said:
But if the cheap GPU installed also wasn’t detected it could mean a motherboard issue. Either way, best to get on to PCS once support reopens. All your troubleshooting looks sound, so probably needs an RMA at this point.
Click to expand...
This is a very good point, totally correct
 
T

TerryChan479

New member
SpyderTracks said:
If you're sure the PCIe cables are properly inserted at the PSU end, then I'm afraid it sounds like complete failure of the GPU unfortunately.
Click to expand...
IRLRobinS said:
But if the cheap GPU installed also wasn’t detected it could mean a motherboard issue. Either way, best to get on to PCS once support reopens. All your troubleshooting looks sound, so probably needs an RMA at this point.
Click to expand...
Yea, that's what I was afraid of...
Anyway, thanks to you all. I will contact PCS support. Hopefully they will come pick up the PC 'cause I am not carrying this thing around.
 
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