I don't have a warm fuzzy about the PSU. I looked on newegg. It has two 12 volt rails, max current of 14 and 15 amps. I have no idea what the total maximum is.
Down at the bottom of the specs list:
"300W Total Output
High Efficiency | Low Power Consumption
RoHS | G.P Qualifications
Complies with EN61000-3-2
Supports Serial-ATA Power
Complete Short circuit Protection on All Outputs
Low Ripple & Noise
100% Burn-In Under High Ambient Temperature (50°C)
Under 30dBA Low Noise Design
Designed, engineered and manufactured to precisely qualify for environmental friendly, GREEN Power Supply status, this 300W ATX12V 2.01 power supply unit features RoHS | G.P"
So if it's really a 300 watt PSU, Maximum 12 volt current cannot be over 25 amps.
And ATX12V 2.01 makes it an old , now obsolete PSU.
A 1 GB GTX460 needs about 10 amps and the CPU will need around 8 amps. That's pretty close. You can try your old PSU, but don't be surprised if you need a new one.
I think that might be a printing error @ NewEgg.
SilentPCReview did a review on that PSU and ran it up to it's full 400w rating on it's load tester. It did OK. Review here.
But I also agree this might be cutting it too close for comfort. PC's 'age' over time and lose the ability to output it's full rated power.
If this Fortron is 3 or more years old I don't think I'd try it with expensive new parts.
Have you found anything that tells you that is a good PSU?
You're adding $700 of premium parts and you want to power it with what looks like a very budgety PSU. At least it gets good reviews from NewEgg customers. But you never know if it's just a "it's good because it works" review.
A good PSU is no less important than a good CPU, video card, motherboard and RAM, at least IMO.
I would not choose that PSU if I were in your position. I'd want to match the quality of the other parts as closely as I could.
The KINGWIN have only 4pin connector(cpu) but the motherboard need 8 pins.
I missed noticing that. It should work but it's better to get a PSU with an 8pin EPS aux CPU power connector anyway.
The final price after rebate is only like $4 or $5 difference for that OCZ ModXStream Pro 600.