My 7-8 year old Silencer 610w still works flawlessly
Is there any company thats equal to the quality of the older PC P&C ? I just purchased a 290x and I know my 610w will struggle with this, but I'm not sure where to look as far a comparable PSU.
Several top manufacturers do it better today than PCP&C did it back then (though it's a common misconception that PCP&C manufactured their own units; your Silencer 610W is a Seasonic inside). Here's where I'd look if I wanted top quality:
Seasonic's Gold and Platinum units are excellent throughout, not just their self-branded units but also units like Corsair AX series and XFX XTR's. Super Flower makes high end Gold and Platinum units for Rosewill (Capstone series) and EVGA (G2 and P2 series). Then you've also got Corsair RM units which aren't flawless but quite low noise and very passable if you catch them on a sale. Corsair's AXi series is also top notch (made by Flextronics), and you've got the Platinum rated HXi series too (made by CWT), but these tend to cost a premium that's hard to justify.
For a single 290X, you'll want a 650W unit, possibly even 750W if you're planning on overclocking and/or your CPU is a power hog. If you're buying from newegg,
EVGA 750 G2 is a super good deal at only $90 AR with 10 year warranty and a 9.8/10 score by JonnyGuru. Comparable quality Seasonic-made units are $20-25 more expensive for 750W, or the same $90 for a 650W one (X-650, SSR-650RM, XFX 650W XTR).