650W PSU for GTX 970

[ninj0e]

Hello everyone, I am currently about to purchase an Asus Strix GTX 970 from amazon and I need to know a few things regarding my current PSU before placing the order.

So my PSU is an Ultra LSP 650W which has two 6 pin PCI connectors, but the problem is that the 970 from asus needs an 8 pin connector. So for saving a few bucks untill I buy a new PSU in the future, I found out three types of adapters for these situations.

1. Is a Molex to 8 pin adapter, which seems to be the least favorable option.
2. A single 6 pin to 8 pin adapter, which I have a few doubts about.
3. And the one that I think would be the most solid option, a dual 6 pin to a single 8 pin adapter.

So what I want to know is, which one of these 3 options be the best and safest solution for this new video card? I will greatly appreciate the knowledge you share with me.

 

[bignastyid]

The ultra lsp series is not good. I wouldn't trust it to power the 970 reliably, and it's bad enough it could even damage something when it fails. Trying to save a few bucks now could end up costing you more.

 

[Mousemonkey]

In reality that is more like a 500w PSU and it should be OK for a single 970 but don't try to run two of them on that.

 

[ninj0e]

I know the PSU is kinda bad, but that is not the question, the question is about the adapters, which one is the most efficient for the 970?