HELP PLEASE! Pc not turning on.

[Empathic]

Hi all,

So recently I made my first pc, with the following components:

x2 Sapphire Radeon R9 280X Toxic OC 3072MB GDDR5 PCI-Express Card
SuperFlower Leadex Platinum 1000W Fully Modular "80 Plus Platinum" Power Supply - Black (NESF-010)
ASRock Z87 EXTREME4 Intel Z87 (Socket 1150) DDR3 ATX Motherboard
Intel Core i3-4330 3.50GHz (Haswell) Socket LGA1150 Processor
Cooler Master HAF XB Case - Black
Microsoft Windows 7 Home Premium SP1 64-Bit - OEM
Kingston 60GB SSDNow V300 Drive SATA 6Gb/s 3 2.5" (7mm height) Solid State Hard Drive - (SV300S3B7A/60G) **Upgrade Bundle Kit /w Adapter**
Kingston HyperX Blu 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9D3B1K2/8GX)
Samsung SH-118AB/BEBE SATA 18x DVD-ROM (Black) - OEM

all working for for around a week.

However, today I installed my 3rd R9 290, tried to turn it on & no power.

So I took it out, tried to turn it on again still no power

I used an anti static wrist wrap, & did unplug some leads to get the gpu back in but as far as I can see it is all wired up correctly but it is not working

Could use some help please, am new to PC building.

Thanks

 

[Empathic]

Update: pressed the reset switch on the mobo now powers up with no gpu's in.. now to try with gpus..