I think this low profile card click here is the best one I can find which only consumes 45W at full load.
That is if you can fit it in your compact tower and make sure you've a low profile adapter bracket if it's not included.
Best phone camera 2017
Stunning new film posters by Hattie Stewart, Joe Cruz & more
iPad Pro 10.5in (2017) review
28 astuces pour profiter au mieux de votre iPhone