Long term graphics card on a low watt PSU?

[llamasg]

Hia,
Over the past year I've been upgrading my PC, so all my hardware is fairly new and I'm happy with it. However, my graphics card is a cheap £70 Radeon 7750 I bought 3-4 years ago. So I think its time for an upgrade. But I'm not sure what card I should get and would like someones opinions other than my own on what's the best price to performance upgrade for my pc.


I have a budget of about £250-£300 and am looking for a strong card that can run newer games at decent settings, fallout, battlefront, just cause 3 etc. I also use things like after effects and premier pro quite a bit.
One thing to take into account is that I have a 450W PSU with no 8-pin connector.
I'm looking for a long term graphics card but am aware that my PSU isn't the best, so if a PSU upgrade is necessary then I'd be willing to spend around £120 on a new one. (On top of the budget)


Here are my full specs:

Case: NZXT H440
MoBo: Gigabyte Z97X-Gaming7
CPU: Intel i7 4790K
PSU: Corsair VS 450W
GPU: Radeon HD 7750 1GB

Thanks,
llama

 

[Xtergo]

Get this graphics card:

http://www.amazon.co.uk/MSI-R9-390-Gaming-Graphics/dp/B00ZPOAYG6/ref=sr_1_2?ie=UTF8&qid=1447790820&sr=8-2&keywords=r9+390x+msi

and yes you need to get a better psu here this is tier one (highest quality category)


http://www.amazon.com/EVGA-SuperNOVA-Modular-Supply-220-G2-0650-Y1/dp/B0106RDIN2

 

[bignastyid]

PCPartPicker part list / Price breakdown by merchant

Video Card: Gigabyte GeForce GTX 970 4GB WINDFORCE Video Card (£272.69 @ Aria PC)
Power Supply: XFX TS 550W 80+ Gold Certified ATX Power Supply (£55.50 @ More Computers)
Total: £328.19
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-11-17 20:11 GMT+0000

Went with the 970 for Cuda support in after effects and Premiere pro.