Update to SSD - Is this my imagination ?

This is my PSU as a JPEG. I don't want to any higher with the card really as on my Sata2 system it will be pointless as it will not go above 7.1
Plus, my machine is not used for gaming. It's just a general purpose domestic workhorse to do all the stuff that a domestic workhorse does these days. But it does not get the sort of industrial strength demands made upon it that gamers machines get.
But something else that I have wondered about to overcome memory limitation on my motherboard, is what would be the result of connecting another SSD on a spare Sata port on my motherboard and then dedicating it to readyboost or paging file ?

I read that as a 365w not a 400w,
You have other items to power too

Compared to gpu's the psu's are pretty cheap.

Get a quality PSU. It's the heart of your rig. Something in the 500 to 650W range would do you nicely and provide lots of headroom for adding devices, or a better GPU.

An added bonus is that you can take a good PSU to a new build, if it isn't too old by the time you do it. :)

Ya that PSU is a piece of junk.

Now again, what GPU are you considering ?

Don`t even consider a 970, I posted a good 960 for you or the 750 Ti is a fine choice too.

EVGA - Products - EVGA GeForce GTX 750 Ti w/ EVGA ACX Cooling - 02G-P4-3755-KR

EVGA - Products - EVGA GeForce GTX 960 4GB SuperSC ACX 2.0+ - 04G-P4-3966-KR

Power Supply

EVGA - Products - EVGA SuperNOVA 650 GS Power Supply - 220-GS-0650-V1

Either of these cards will put you at 7.8 or 7.9 in WEI

Most psu's accommodate a lot of mobo's if not all and do come with new wiring
EVGA has some very nice looking wiring and reasonable prices,

The GT640 is not reaching very high but you wouldn't need to upgrade your psu with that card it's well under your current psu's wattage
I believe there are 350w minimum cards out there that are in the same price range as the GT640

Here's a 300w minimum that AddRam posted spec's sheet,
EVGA - Products - EVGA GeForce GTX 750 Ti w/ EVGA ACX Cooling - 02G-P4-3755-KR
EVGA - Product Specs - EVGA GeForce GTX 750 Ti w/ EVGA ACX Cooling

Hi,
Well I believe your aiming low but that asus card only uses 64watts so it will be fine with your current psu,
The better cards use better fans so the noise level isn't much at all
But your budget will overrule anything else :)