Like the title said the 240 Watts PSU is NOT enough for GTX 1070 let alone being paired with a i7 6820HK. The GTX 1070 wont run to its full potential with that PSU!! Are there any upgrade options for the PSU ?
We have tested it and it has worked without issues.
But you can source a 330W adapter if you feel like you could squeeze more juice out of it.
Dell | Alienware Technical Support
Opening your case does not void your warranty! Check out Alienware Artificial Intelligence
I can't always reply to PM's, if you need extra assistance visit:
Genuine Dell XM3C3, ADP-330AB B, DA330PM111, 330 Watt Power Adapter PA Charger with 6ft Power Cable/Cord For Alienware