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GTX 660 ti power supply specs

Got a thermaltake 750 laying around I was curious if it will run my GTX 660 TI 3gb that I got from evga today.

I know that it needs 24a on the +12v rail
Am I safe to assume that hooking up 2 rails @18a a piece will be enough?
Specs
TypeATX12V / EPS12V
Maximum Power750W
Fans1x 14 cm Fan
PFCActive
Main Connector20+4Pin
+12V Rails4
PCI-Express Connector2 x 6-Pin
SATA Power Connector6
SLICertified
CrossFireReady
ModularNo
Power Good Signal100-500ms
Hold-up Time16ms min.
Efficiencyup to 85%
Energy-Efficient80 PLUS BRONZE Certified
Over Voltage Protection+5V 7.0 Vmax
+3.3V 4.5 Vmax
+12V 15.6 Vmax
Input Voltage100 - 240 V
Input Frequency Range47 - 63 Hz
Input Current10A @ 115V, 5A @ 230V
Output+3.3@30A,+5V@28A,+12V1@18A,+12V2@18A,+12V3@18A,+12V4@18A,-12V@0.8A,+5VSB@3A
MTBFMTBF>120,000 hours
ApprovalsCE, CB, TUV, FCC, UL, CUL, and BSMI certified
16 answers Last reply Best Answer
More about power supply specs
  1. should be fine.
  2. Best answer
    Unless your psu is defective, it should work.
    It has two 6 pin connectors, and should be able to power them both.
    That is what is required for your GTX660ti.

    As a note, you can't just add the several +12v rails to get the total amps. It will often be less.
    Modern psu's will have that total on their data plates expressed in amps or wattts(divide by 12 to get amps)
    virtually all psu's really have one power generation source, and the division into rails is a ul safety spec that really is not needed.
  3. "Thermal and Power Specs:
    97 CMaximum GPU Tempurature (in C)
    150 WMaximum Graphics Card Power (W)
    450 WMinimum System Power Requirement (W)4
    Two 6-pinSupplementary Power Connectors"

    - Specifications from Geforce website
    Be careful with multiple 12v rail PSU's. while the power supply has plenty of output wattage, if the card is running through 1 12v rail and runs up 18a during time of heavy usage your system my cut off and reboot. had it happen to me before
  4. Once its still functioning correctly that will be more than enough power for your HTX 660 Ti 4x 18 A = +/- 72 Amps combined and your Card only needs 24 Amps =]

    P.S. the rails aren't actually cords that you connect they are built into the PSU's design internally
  5. I used that psu in a rig with 8800 gtx sli mode, but wasn't completely sure if it would work with this one. On a side note this was installed in an upper case, now that I got an antec 902 can I turn this thing upside down?
  6. Yea i know the rails are actually in the PSU and not the cables
  7. Rich_Mars1 said:
    I used that psu in a rig with 8800 gtx sli mode, but wasn't completely sure if it would work with this one. On a side note this was installed in an upper case, now that I got an antec 902 can I turn this thing upside down?

    Yes you can install the power supply upside down or in any angle
  8. Rich_Mars1 said:
    I used that psu in a rig with 8800 gtx sli mode, but wasn't completely sure if it would work with this one. On a side note this was installed in an upper case, now that I got an antec 902 can I turn this thing upside down?

    8800GTX sli actually needs more power. You are good there.
    A psu is perfectly happy right side up or upside nown. No worries there either.
  9. I was told that a psu with a single +12v rail was better than a multi rail. I have on this computer a 750 pc power and cooling w/60a. I am on the fence wether to change out this one which supplies my GTX 275 with the other one. To my understanding the 275 uses more power so i figured I would use the thermaltake. Am I correct to assume this or should I swap it out?
  10. The 60a is one a single rail btw.
  11. nah the thermaltake will be just fine
  12. I am glad that will work out, wasn't in the mood to cable manage 2 cases in the near future.
  13. Rich_Mars1 said:
    I was told that a psu with a single +12v rail was better than a multi rail. I have on this computer a 750 pc power and cooling w/60a. I am on the fence wether to change out this one which supplies my GTX 275 with the other one. To my understanding the 275 uses more power so i figured I would use the thermaltake. Am I correct to assume this or should I swap it out?


    No need to swap. modern 28nm cards use less power.

    As earlier, the number of rails is an artificial safety spec, not a performance spec.
    For some time, PC P&C who make great psu's were touting the benefits of their single rail and non modular construction.
    Over time, both have been shown to be a non issue.
  14. I am relieved that this will work out. I bought that 750 PC P&C because of the stablility for overclocking the rig that I am on now. It's just older, not like it's dying, but it's an old dx10 rig and I am tired of missing out on playing all the new games that support dx11. The kids will be getting an upgrade as well so it's a win-win!!
    750iFTW mobo
    8gb corsair ddr2 xms2
    Antec 900 case
    q6600 @3.05 w/zalman cooler
    gtx 275
    pc cooling 750 psu
    2.75 tb (2 1 tb wd & 1 750gb Hitachi)
    Thanks for all the info guys!!
  15. Best answer selected by Rich_Mars1.
  16. Glad to hear we could help
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