That's an older PSU. I'm not sure how good it [still] is. I would replace it. A quality modern PSU has full range active PFC (no little voltage switch) and 80+ certification for efficiency (which also means it was tested at 100% load). Antec, Seasonic, Corsair, and Enermax are among the better brands with models in the 500W range.
The TPII series was never that great to begin with.
It's an old design and discontinued now.
The TP New series is built by Seasonic and very good.
I would buy at least a 500-650W unit for your set-up.
650W are becoming the norm and priced very reasonably.
Antec,Corsair,Seasonic,and XFX are the best.
Seasonic basically oem's all of the aboved mentioned anyways.
Antec TP New
XFX all of them as far as i know. http://www.newegg.com/Product/Productcompare.aspx?Submi...
I would feel more comfortable recommending going the 840 route as that processor will draw about the same watts as your old 9600. If you go for that 965 it can draw up to 50 more watts, even more if overclocked. The capacitors in PSUs age and can lower the output ability to some extent. I think your asking for trouble if you push that PSU to its limits with the 965.
I would probably retire the Antec PSU and go for the 965 with a new PSU that has ample breathing room. Risking your components to a PSU at its limit doesn't sound like a good idea to me.
I had an Antec 400watt PS, about 5 years old. Running an old Intel single core. I built a new system with an AMD Phenom 640 quad core CPU. Turned on the system would start to boot, then fans would shut off. Only the Green LED on the motherboard would remain. Press power on, nothing. Had to unplug the system to try again, BUT, same results EVERYtime.
The problem, turns out the Antec 400watt was Really Weak from age. Even thou the system only needs 65watts idle, 90watts normal running, and 132watts under Prime95 & Furmark loading. That old 400watt Antec simply would not run the system.....
Powersupplies get weak with age, the good news, new ones aren't that expensive. A good 650watt supply will run any CPU and any Single video card up to a 560 TI or 6870. Above that or for SLI / Crossfire at least an 850watt would be best.
Go to Antec support and try out their PS calculator...