I'm guessing that's an i7-2600K... which means it's not as efficient as a newer Ivy or Haswell i7, but not the power hog that a first generation i7 would be.
Yes it is.
Some 650W units have four, the ones you mentioned do not (assuming by CXM 650W you mean CX600M).
I always wonder whether it's okay to add 2 more molex --> Pcie converter if the PSU only provides 2 Pcie connectors. How do we know which molex to use to avoid overloading one of the +12v rails ? Does it matter ?
I would consider (i.e. equipped with 2x PCI 6-pin, 2x 8-pin and having at least 650W, and having that Intel certification for being Haswell compatible) to be the FSP Fortron/Source Aurum Gold 700W ATX 2.3 (AU-700) closely followed by the Sea Sonic S12G 650W ATX 2.3 (S12G-650). Both have the five years warranty you would want, both are 80 plus Gold.
Today, I was shopping around & looking for :
- Seasonic M12II-650 650W Modular
- Seasonic M12II-750 750W Modular
- Seasonic G-650 650W & G-750 750w
- Seasonic SS-750JS-BE 750W - Bronze
- Corsair CX-750M Modular
All no stock, except Seasonic G series 650w. The only Seasonic models in stock are either 500-650 watts of either the cheap ECO Power (upto to 600w), the X & Platinum series (too expensive for me). I was limiting myself to look for Seasonic M12 & G series because they're Haswell compatible, but alas only G-650 is in stock.
I called Corsair & Seasonic and they confirmed the models I listed are not in stock.
For Corsair CX/CXM series, I could only find the 600w models, which I'm not interested. Corsair distributor reassured me to get CSM-750 Gold series, because it is better than the older CX-750M Bronze (& still within my budget).
So.....amid my doubt to get Seasonic G-650, I ate the poison & bought CS-750M . :\
Feature wise, I find Corsair CS-750M fits my criteria:
- Big single rail of 12v : 62 Amp
- 4 Pcie
- Haswell compatible
But after reading some reviews of the CS 650watt models just now, I wonder if I made the right choice. Not many reviews yet for this CS series because it's new, but the I found 2-3 reviews of the 650watt models, and their conclusion is like "well okay it passed my test".
The CX-750M reviews sound better for me honestly.
Well, I've bought this one and I can only hope it is not really a "trashy" product from Corsair, esp. at $140.
Only 3 years warranty though. I still wish I could find Seasonic M12II or G-750