Question 2080ti not detected in BIOS or Windows

[ShottyMonster]

Just had my brand spanking 2080ti delivered today. Installed it and connected 6+2 and 8 pin PCIE cables, daisy chained off a single 6+2 connection to my HX850i PSU.

When I power the PC up the GPU appears to have power (the LEDS light up). However I am getting no signal, so I have had to plug HDMI from my mobo to be able to get into windows and post this.
Device manager isn't detecting it and it's not detected in BIOS either. My motherboard is a TUF Z270 Mark 1 and I've updated the BIOS to the very latest version.
Can anyone help me? I'm so annoyed at myself right now :-(

 

[Phaaze88]

You have to use 2 separate cables. Daisy chaining won't work.

 

[ShottyMonster]

You have to use 2 separate cables. Daisy chaining won't work.

100%? I really hope this is all it is. I've tried both GPU slots on my motherboard. Do you know where I should plug the extra cable into the PSU (bear in mind I have an H850i - it has 1 4x4 CPU socket and only 1 6+2 PCIE socket. So do I need a new PSU (even though this is an expensive 850W PSU?). Is it 100% not a problem with the motherboard not supporting 2080ti? When I search http://www.pc-specs.com/gpu/Nvidia/20_Series/GeForce_RTX_2080_Ti/4050/Compatible_Motherboards I can't see Z270 Mark 1 motherboard, only Z270 Mark 2 (Not sure why this would make any difference, I believe they run on the same BIOS. And the Z270 Mark 1 is still a fairly high end motherboard)...

 

[Phaaze88]

?
Is this not your psu?

It's got five 8pin EPS/PCIE ports...

 

[ShottyMonster]

?
Is this not your psu?

It's got five 8pin EPS/PCIE ports...

That's the one, I lost the manual for it in a house move about 6 month ago. So where it says 6+2 PCI-E & 4+4 CPU refers to the sockets above AND below the text?

 

[Phaaze88]

Yeah, you can use all 5 of those. They are 'keyed' the same.

 

[ShottyMonster]

Yeah, you can use all 5 of those. They are 'keyed' the same.

Thanks Phaaze, I've ordered more PCI-E cables and plugged my 1070ti back in for the meantime. Based on what you said and some further research, turns out the GPU I bought (MSI RTX 2080ti gaming trio) requires 2x8 + 6 PCI-E even though the reference card is only 2x8... And, the retailer I bought it from had stated only 2x8 as well:

https://www.ebuyer.com/857819-msi-g...-11gb-graphics-card-rtx-2080-ti-gaming-x-trio

I never ran any stress tests or did anything other than login to windows and post this. So hopefully I haven't caused any damage to PSU/Cables/GPU by only connecting it with daisy chained 2x(6+2)...

 

[Phaaze88]

Your psu should've already had the necessary cables though?
In the pic I linked, right above the motherboard connectors, those 3 receptacles can be used for the 2080Ti, and the 2 above those for the cpu.

Did you lose your psu cables or something?
What's the rest of the system specs?

 

[ShottyMonster]

Your psu should've already had the necessary cables though?
In the pic I linked, right above the motherboard connectors, those 3 receptacles can be used for the 2080Ti, and the 2 above those for the cpu.

Did you lose your psu cables or something?
What's the rest of the system specs?

Hey Phaaze, sorry for slow reply. I lost the spare PCI-E cables yea... (d'oh)

My current system specs (whilst I wait for the PCI-E cables to arrive):

TUF Z270 Mark 1 motherboard
7700K OC'd @ 5GHz
Corsair H80i AIO Water Cooler
ROG GTX 1070ti
32GB Corsair Vengeance LPX DDR4
Corsair HX850i PSU
Fractal Design R5 White Case
5 140mm Fractal Fans
27" ROG XG279Q 144Hz Monitor (x2)

 

[ShottyMonster]

Your psu should've already had the necessary cables though?
In the pic I linked, right above the motherboard connectors, those 3 receptacles can be used for the 2080Ti, and the 2 above those for the cpu.

Did you lose your psu cables or something?
What's the rest of the system specs?

And, I have the new PCI-E cables now, all set up and after a few scary moments caused by outdated drivers I've got it up and running. Benchmarking it in a few games and seeing an improvement over the 1070ti I had before and whilst it is better it's not the massive improvement I was hoping for (although only tested it in Total War: Warhammer 2 where the frames are fairly CPU bound and iRacing which again is a fairly CPU bound game).