Sign in with
Sign up | Sign in
Your question
Solved

GTX 660 ti power supply specs

Last response: in Graphics & Displays
Share
October 11, 2012 11:00:26 PM

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
a c 92 U Graphics card
a b ) Power supply
October 11, 2012 11:03:22 PM

should be fine.
m
0
l

Best solution

a c 275 U Graphics card
a c 147 ) Power supply
October 11, 2012 11:13:13 PM

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.

Share
Related resources
a b U Graphics card
a b ) Power supply
October 11, 2012 11:14:11 PM

"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
m
0
l
a b U Graphics card
October 11, 2012 11:21:23 PM

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
m
0
l
October 11, 2012 11:21:58 PM

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?
m
0
l
a b U Graphics card
a b ) Power supply
October 11, 2012 11:24:41 PM

Yea i know the rails are actually in the PSU and not the cables
m
0
l
a b U Graphics card
a b ) Power supply
October 11, 2012 11:25:23 PM

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
m
0
l
a c 275 U Graphics card
a c 147 ) Power supply
October 11, 2012 11:28:03 PM

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.
m
0
l
October 11, 2012 11:32:38 PM

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?
m
0
l
October 11, 2012 11:34:12 PM

The 60a is one a single rail btw.
m
0
l
a b U Graphics card
a b ) Power supply
October 11, 2012 11:35:10 PM

nah the thermaltake will be just fine
m
0
l
October 11, 2012 11:45:08 PM

I am glad that will work out, wasn't in the mood to cable manage 2 cases in the near future.
m
0
l
a c 275 U Graphics card
a c 147 ) Power supply
October 11, 2012 11:45:09 PM

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.
m
0
l
October 12, 2012 12:13:43 AM

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!!
m
0
l
October 12, 2012 12:25:41 AM

Best answer selected by Rich_Mars1.
m
0
l
a b U Graphics card
a b ) Power supply
October 12, 2012 1:06:42 AM

Glad to hear we could help
m
0
l
!