Biggest TFX psu? I have a dilemma...

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So I have a Lenovo H30 (i7 4780, 8gb, gfx 745), I got it as it was on clearence for a decent price.

I'm looking to stick a gfx 970 in, problem being that the PSU is only a 280w TFX psu and the case won't house anything else.

I've looked online for TFX psus, the typical size I can see is 300w, EZcooler do a 400w one. I've found a 500w one by a company called '3Go', I've never heard of them, it's pretty cheap and they're based in Spain. I'm reluctant to stick what could be a subpar psu in my rig.

My options seem to be:

1) run a 400w psu (970 wants 450w)

2) run a 500w psu (from an unknown manufacturer)

3) transfer cases (this would seem best, the only issue is that the wifi card appears to be wired to an antenna on the case, the only way to remove the antenna would be to break the soldering or take a hacksaw to the case. There is also what I assume to be an earthing wire soldered on too and I'm not 100% what the boards form factor is, it appears to be micro atx, not sure if the mounting hole placement is standard)

Obviously the easiest thing would be to just stick a decent PSU in the existing case, but I can't find a reputable manufacturer who makes a 450w+ tfx.

Does anyone know of any?
 
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Not posted on here for years (as you can probably tell from the specs in my signature, haha), PSUs, mobo form factors and case size were something I never even had to give a thought to back then... :-/

Not been serious about computing for years and look at the oversights I've made as a result!

Happy with the rig for what I paid, but will definitely build from scratch next time, Lenovo don't seem to want you to be able to upgrade easily, the mobos power socket is 14 pin ffs...
 
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