Wrong cable from PSU to Graphics card?

MikeNashFlash · 12 Feb 2017 at 18:46

Hey guys, so I have had trouble getting my Graphics card up and running. It seems to be a power issue, as the motherboard can tell there is a GPU attached, and the fans are not spinning.

I noticed that the pins on the cable from the PSU to the GPU do not seem to match. The PSU came with two cables, each one with two connectors - one labelled PCIe and one labelled SLI ready.

Here is a photograph of the pins on the cable, and the slot on the GPU. As you can see, the top left has a square slot, whereas the cable has a curved pin. Does this indicate that this is the wrong cable for this GPU?

https://scontent-lhr3-1.xx.fbcdn.ne...=64caf6f96fcc4db434a8782a3af78c75&oe=58A27A8B

https://scontent-lhr3-1.xx.fbcdn.ne...=c0e966ed94cee8e8e7ba4c6323d5be36&oe=58A27DD7

Thanks.

stulid · 12 Feb 2017 at 18:57

The pins with the corners should slot into the square holes of the gfx card just fine.

MikeNashFlash · 12 Feb 2017 at 19:03

Ok. It slots in just fine but I cannot figure out how to get the GPU up and running - there is no power to the GPU and the fans aren't turning

stulid · 12 Feb 2017 at 19:07

And the board works fine without the gfx card fitted?

MikeNashFlash · 12 Feb 2017 at 19:23

Yes, I have been using to play games without the card functioning

stulid · 12 Feb 2017 at 19:27

IS the card seated correctly, is it visible in the BIOS? maybe try a BIOS update.

MikeNashFlash · 12 Feb 2017 at 19:32

In the BIOS, when I go into Too/Graphics card information - it says there is an NVIDIA GPU attached in the correct PCI slot, running at x16 native.

I think the card is seated correctly. How do I go about updating the BIOS?

mattyfez · 12 Feb 2017 at 19:50

What card have you got and what PSU?
Unlikely but it might not be getting enough power.. do you have a bios speaker, it will make a right racket if the card is not getting enough power.

From your photo's they are both 8 pin pci power plugs, the only difference being one is a full 8 pin, and the other a 6+2, which is essentially the same thing.

mattyfez · 12 Feb 2017 at 20:06

Also, is the power cable for the graphics card 'clipped in' properly, sometimes they can 'feel' like they are in, but they should click when fully inserted, which can take a bit of pressure, not a forcefull amount but but more than you might expect if it's a tight fit.

MikeNashFlash · 12 Feb 2017 at 20:18

It's a GTX 1070 with this PSU (It's 750W so it should be enough) https://www.overclockers.co.uk/supe...emi-modular-power-supply-black-ca-011-sf.html.

I will have a look at pushing it in a little more, checking if it is properly inserted.

MikeNashFlash · 12 Feb 2017 at 20:20

By the way, I do have a speaker installed and there is always one short beep on startup. Which according to the ASUS website means "VGA detected, No keyboard detected" which is odd, since I do have a keyboard connected via USB that is allowing me to input commands...

pastymuncher · 12 Feb 2017 at 20:35

Can you tell us your full list of components please? If it's a older motherboard then it may need a bios update to be compatible with the new gpu. Most 1070's have fans that don't turn when at idle or below a certain temperature/load.

mattyfez · 12 Feb 2017 at 20:39

Yeh. One short BIOS beep is normal when booting up.

MikeNashFlash · 12 Feb 2017 at 20:43

Ah, I see. I have just turned my rig on - and I have noticed that the fans are indeed turning - and then stop turning after about 10 - 15 seconds. So power must be going to the card.

Full list of components:

Motherboard: Asus Z170 Pro Gaming
RAM: Corsair Vengeance DDR4 2400MHz
CPU: Intel 6700k
GPU: GTX 1070
SSD: Samsung 250GB 750 EVO
HDD: Not functional at the moment
PSU: Super Flower Golden Green HX 750W "80 Plus Gold" Semi-Modular Power Supply
Cooler: Corsair Hydro Series H80i v2 Extreme Performance Liquid CPU Cooler

mattyfez · 12 Feb 2017 at 20:50

Hang on, so if your monitor is plugged into the graphics card, and not the motherboards dvi/hdmi output.

And you can access BIOS, then what's the actual issue, does it load into windows ok? Does it display properly?

Modern graphics card fans don't spin unless the card gets warm, other than maybe a quick spin when you boot the pc up.

MikeNashFlash · 12 Feb 2017 at 20:55

I have just loaded up XCOM2 (not a particularly graphically intensive game), and the framerate is very slow at 1080p max settings. The card is definitely not functioning correctly.

My monitor is not plugged into the graphics card. I am only using a HDMI cable to connect to the motherboard. Is that the problem?

mattyfez · 12 Feb 2017 at 20:59

Ok, how does it perform with a different game?
Does it perform ok in general use, say when surfing the net or watching YouTube or whatever?

Also, have you gone to the nvidia website and downloaded the latest official up to date drivers for the card?

MikeNashFlash · 12 Feb 2017 at 21:03

Yes, the PC is fine in general use. With different games it is the same - modern graphically intensive games are a very slow frame rate, but I can play the original Witcher game at 1080p resolution just fine.

MikeNashFlash · 12 Feb 2017 at 21:08

The graphics card came with a driver disk that I installed. I don't remember if I went online and downloaded a driver from there.

MikeNashFlash · 12 Feb 2017 at 21:09

I will check if I have the latest drivers installed after I finish work tomorrow. Thankyou very much for your help and suggestions.