Risks insufficient minimum wattage psu for new gpu

[hndrk]

Hello,

I have bought a new video card: it's a -> (ASUS GTX660-DC2T-2GD5)*.
(On the spec sheet of my gpu it says: Power Consumption up to 150W)

_My question to you is: can I use this gpu fully without problems, with my psu -> (ENERMAX Liberty ELT400AWT)* (For mainly the newest games at preferably the highest settings).

On the video card box it says:
Recommended system requirements:
Minimum 450W system power supply (with a minimum 12V current rating of 24A)

_Problem?: My psu has "Maximum Power 400W" and a output of 20A on the 12V rail.

_That is 50W and 4A short. Is this ever going to kill my system? Am I going to experience issues?

All usable advice is welcome!

Thanks!

*Follow for the specs the links below.
-------------------------------------------------------------------------------------------------

My setup:

-*psu
(ENERMAX Liberty ELT400AWT) -> (http://www.newegg.com/Product/Product.aspx?Item=N82E16817194002)

-mobo
(Asus P5N32-SLI SE Deluxe) -> (http://www.asus.com/Motherboard/P5N32SLI_SE_Deluxe/)

-cpu
(Intel Core 2 Duo E6600 2,4 GHz, 1066 MHz) -> (http://ark.intel.com/products/27250)

-cpu koeler
(Zalman CNPS9700 NT LED) -> (http://www.newegg.com/Product/Product.aspx?Item=N82E16835118087)

-*gpu
(ASUS GTX660-DC2T-2GD5) -> (http://www.asus.com/Graphics_Cards/GTX660DC2T2GD5/#overview)

-dvd drive
(ASUS DRW-1608P3S) -> (http://usa.asus.com/Optical_Storage/Internal_DVD_Drive/DRW1608P3S/#overview)

-ram1 - 1gb
(Kingston 1GB kit of two) -> (http://www.valueram.com/datasheets/KVR533d2n4k2_1g.pdf)
-ram2 - 1gb
(Crucial 1GB) -> (http://www.arrow.com/item/detail/micron-technology/mt16htf12864ay-667d4)

-hdd1 - 40gb
(samsung sp0411n) -> (http://reviews.cnet.com/system-hard-drives/samsung-spinpoint-pl40-sp0411n/4505-9989_7-30609914.html)
-hdd2 - 250gb
(Western Digital WD2500KS) -> (http://www.newegg.com/Product/Product.aspx?Item=N82E16822144701)
-hdd3 - 250gb
(Samsung SP2504C) -> (http://www.newegg.com/Product/Product.aspx?Item=N82E16822152025)

 

[th3_ory]

It should be okay. It wont be if you had a better CPU.

 

[ko888]

For a system using a single GeForce GTX 660 (non-Ti) graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the critical factor.

The Enermax Liberty 400 Watt Power Supply (ELT400AWT), with its maximum combined +12 Volt continuous current rating of 30 Amps and with two 6-pin PCI Express supplementary power connectors, is sufficient to power your system configuration with a single GeForce GTX 660 (non-Ti) graphics card.

 

[hndrk]

Wow, thanks guys, really appreciate the fast replies!!!

Me being afraid of ruining my system; I ordered a way? better psu.
But after your replies I'm troubled. It's a lot of money to invest into something I apparently aren't in need off.

I would imagine given your replies that a CORSAIR AX860i 860W is just overkill, right?

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139041&Tpk=CP-9020037

Am I trowing away money, or is this a good investment for the future? I mean; how long
will my current 'Liberty 400 Watt' be good enough to play future games on my setup?
Or will my current setup, with what I figure to be one of the best GPU out there
at the moment, last for a good couple of years?

The psu is arriving here tomorrow, and I can still cost free deny the order at my door, getting my money
back in a couple of days if I would do that. Would you sent it back?

 

[ko888]

Wow, thanks guys, really appreciate the fast replies!!!

Me being afraid of ruining my system; I ordered a way? better psu.
But after your replies I'm troubled. It's a lot of money to invest into something I apparently aren't in need off.

I would imagine given your replies that a CORSAIR AX860i 860W is just overkill, right?

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139041&Tpk=CP-9020037

Am I trowing away money, or is this a good investment for the future? I mean; how long
will my current 'Liberty 400 Watt' be good enough to play future games on my setup?
Or will my current setup, with what I figure to be one of the best GPU out there
at the moment, last for a good couple of years?

The psu is arriving here tomorrow, and I can still cost free deny the order at my door, getting my money
back in a couple of days if I would do that. Would you sent it back?

The Corsair AX860i is definitely excessive for a system running with a single GeForce GTX 660 graphics card.

I would recommend keeping the new power supply only if you know you will be upgrading to a higher power consumption graphics card or adding a second graphics card for 2-way SLI mode sometime in the future.

 

[ARICH5]

@ko888...what is the reliability lik,e for enermax? i understand they make their own psu's.

 

[hndrk]

The Corsair AX860i is definitely excessive for a system running with a single GeForce GTX 660 graphics card.

I would recommend keeping the new power supply only if you know you will be upgrading to a higher power consumption graphics card or adding a second graphics card for 2-way SLI mode sometime in the future.

Again thanks a lot for the fast replies!

I'm not going to SLI mode or buy a new video card any times soon, the last one I bought was 5 years ago
(a HD5670). The GTX660-DC2T-2GD5 was a big and quite unprecedented investment, which came about
after seeing way to much "newest games"- trailers, and thinking "man if I want to enjoy those games to
the fullest I have to upgrade my gpu". So I went a little crazy and bought the GTX, then became worried after seeing the minimum requirements on the box, you fixed that :-D.

But still; If I not get the AX860i, Do you think my current setup, with one of the best GPU out there at the moment, be able to run high or ultra settings for at least the next 3 years? Or am I looking at 2 years or even 1 year?

 

[ko888]

@ko888...what is the reliability lik,e for enermax? i understand they make their own psu's.

Enermax has been quite reliable.

They make most of their own PSUs.

CWT (i.e. Channel Well Technology) is the OEM for Enermax's EX series, NX series, Tomahawk, NAXN / Tomahawk II, NAXN 80+, NAXN ADV, 3 models in NAXN 82+, RG series, GX series and one model in Triathlor.

FSP is the OEM for Enermax's NAXN 87+ series.

High Power (Sirtec) is the OEM for Enermax's MX series and two models in the NAXN 82+ series.

 

[ko888]

Again thanks a lot for the fast replies!

I'm not going to SLI mode or buy a new video card any times soon, the last one I bought was 5 years ago
(a HD5670). The GTX660-DC2T-2GD5 was a big and quite unprecedented investment, which came about
after seeing way to much "newest games"- trailers, and thinking "man if I want to enjoy those games to
the fullest I have to upgrade my gpu". So I went a little crazy and bought the GTX, then became worried after seeing the minimum requirements on the box, you fixed that :-D.

But still; If I not get the AX860i, Do you think my current setup, with one of the best GPU out there at the moment, be able to run high or ultra settings for at least the next 3 years? Or am I looking at 2 years or even 1 year?

Your current power supply should have no problem powering your system with an ASUS GeForce GTX 660 Direct Cu II TOP 2 GB.

That graphics card should be drawing less than 10 Amps from the +12V rail(s) during gaming. That leaves the remaining 20 Amps on the +12V rail(s) to power the rest of the components in the system that draws from that rail.

 

[hndrk]

Guys thanks a lot for all the replies!

I have my answer!

Greets,
hndrk