Does my PSU enough for it?

StaticStrength · Aug 3, 2014

Hi guys i'm gonna buy R9 280x and Nvidia Gt640(for physx) and i have High Power 750 Watt 80+Bronze. Will it be k or do i need a new PSU?

My CPU: Fx8350
My motherboard: Asus M5a99X Evo

Littlesackninja · Aug 3, 2014

You cannot run both those graphics cards at the same time, You would have to buy 2 of one of the cards (Crossfire and Sli)
But yes 750w would be enough for either of those cards and would leave you enough for Sli or Crossfire down the road.
Sli for Gtx 640
Crossfire for R9 280x

SgtStiffler · Aug 3, 2014

You'd probably be okay; the recommended for the AMD card is 600w, the GT 60w. The processor can draw up to 125w, however. To be on the safe side you'd have to upgrade to a 850w. However, as the guy above me said, you can't run these cards together as they're different makes. PhysX probably isn't worth your extra time: I can scarcely tell the difference.

nukemaster · Aug 3, 2014

They want to use modded drivers to allow the Nvidia card to run PhysX while the AMD card does the 3d work.

Many have done it.

With this an all 3rd party patches, you are taking a chance that it will all work right(Nvidia tries hard to prevent this type of use. To that point even users who had the actual hardware PhysX lost the ability to use them with non Nvidia cards shortly after Nvidia took over.).

As far as AMD and Nvidia in the same system, that is not an issue at all. It was an Issue only on Windows Vista systems because MS was trying to avoid conflicts that may happen with multiple GPU makers cards installed.

SgtStiffler, I am not sure how you came across this info, but cards like the 295x2 can get to and pass 600 watts, but only under non game furmarks stress. The 280x will be about 250 (average is about 210-240ish) for most games and to get over 300 will need something like furmarks.

Please post the exact specs on the power supply.

SgtStiffler · Aug 3, 2014

nukemaster :

They want to use modded drivers to allow the Nvidia card to run PhysX while the AMD card does the 3d work.

Many have done it.

With this an all 3rd party patches, you are taking a chance that it will all work right(Nvidia tries hard to prevent this type of use. To that point even users who had the actual hardware PhysX lost the ability to use them with non Nvidia cards shortly after Nvidia took over.).

As far as AMD and Nvidia in the same system, that is not an issue at all. It was an Issue only on Windows Vista systems because MS was trying to avoid conflicts that may happen with multiple GPU makers cards installed.

SgtStiffler, I am not sure how you came across this info, but cards like the 295x2 can get to and pass 600 watts, but only under non game furmarks stress. The 280x will be about 250 (average is about 210-240ish) for most games and to get over 300 will need something like furmarks.

Please post the exact specs on the power supply.

I got it from here: http://www.realhardtechx.com/index_archivos/Page362.htm

Recommended, not maximum. XD

StaticStrength · Aug 3, 2014

nukemaster :

It's the power which comes with Aerocool Strike-X Xtreme Black Edition Case. Brand is High Power and its 80+Bronze afaik.

Edit: I found it http://www.highpower-tech.com/turkish/product_page.php?class=20110831163239&id=20130814134445#Features

nukemaster · Aug 3, 2014

That would be a recommended for a full system not just the card.

The aim of this article is to help you better understand what power supply your computer may need depending on its most power-hungry component: the graphics card. The “Recommended PSU Wattage” value is for the whole system, not only for the graphics card/s.

So it varies quite a bit with the system.
My media center runs without issues on a GTX 650 ti on a 300 watt power supply thanks to its power friendly i5 750 cpu and low powered board. If I trust my UPS the thing has yet to pass about 180 watts and games most of the time in the 140-150 range.

Lets estimate worst case here.

Board + memory 50 watts
Video card 300 watts(I know it can be more with furmarks, but who does this with the rest of the system loaded)
Hard drive 10 watts
CPU 140 watts(just in case).
GT640 lets say 50-60 watts(more likely 30ish when used for PhysX alone).

We are still at 560 watts and that would be balls to the wall 100% load. Even most games do not push a system that hard. When not loaded the system will take much less power.

As long as the power supply is not of low quality and has enough of its power on the 12 volt rail(this is important because modern systems use this rail more than anything else), this should be ok.

StaticStrength · Aug 3, 2014

nukemaster :

That would be a recommended for a full system not just the card.

The aim of this article is to help you better understand what power supply your computer may need depending on its most power-hungry component: the graphics card. The “Recommended PSU Wattage” value is for the whole system, not only for the graphics card/s.

So it varies quite a bit with the system.
My media center runs without issues on a GTX 650 ti on a 300 watt power supply thanks to its power friendly i5 750 cpu and low powered board. If I trust my UPS the thing has yet to pass about 180 watts and games most of the time in the 140-150 range.

Lets estimate worst case here.

Board + memory 50 watts
Video card 300 watts(I know it can be more with furmarks, but who does this with the rest of the system loaded)
Hard drive 10 watts
CPU 140 watts(just in case).
GT640 lets say 50-60 watts(more likely 30ish when used for PhysX alone).

We are still at 560 watts and that would be balls to the wall 100% load. Even most games do not push a system that hard. When not loaded the system will take much less power.

As long as the power supply is not of low quality and has enough of its power on the 12 volt rail(this is important because modern systems use this rail more than anything else), this should be ok.

Found the link of it as i edited the post b4.

http://www.highpower-tech.com/turkish/product_page.php?class=20110831163239&id=20130814134445#Features

nukemaster · Aug 3, 2014

The site lists 675 watts on the 12 volt rail. It is a bit low for a 750 watt power supply(closer to a 700 watt).

This should still work for your system.

If you already have a system on it, you can check a hardware store for a power monitor. It just plugs into the wall and the system plugs into it. This allows you to see the actual power consumption at the wall.

At the wall power consumption is always higher because the power supply turns some of the power it is converting into heat(the reason it has heatsinks and a fan inside.).

StaticStrength · Aug 3, 2014

So am i good to go with my system + these 2 cards or should i buy better PSU for safety?

SgtStiffler · Aug 3, 2014

nukemaster :

As you seem to be quite knowledgeable about PSUs, how much power does it have to be drawing to have its fan spin? I'm using the Corsair CX750 with a GTX 670, FX-8350, 1 HDD and 7 fans.

SgtStiffler · Aug 3, 2014

StaticStrength :

I think you're good to go. XD

StaticStrength · Aug 3, 2014

One last question is there any good and updated guide to make a physx card?

SgtStiffler · Aug 3, 2014

StaticStrength :

Sorry, I don't understand what you mean...

StaticStrength · Aug 3, 2014

I need a guide, a walkthrough to make my Gt640 a physx card since i dont know how to do it

SgtStiffler · Aug 3, 2014

StaticStrength :

You just have to install the PhysX drivers.

StaticStrength · Aug 3, 2014

Is that easy? Wow I was expecting something hard to do, like modifying drivers and all.

thelasthallow · Aug 3, 2014

StaticStrength :

its not that easy. to use an Nvidia card for PhysX with an AMD card you need hacked Nvidia drivers. there used to be a big group of people who would modify every driver release to use Nvidia cards for physX for AMD cards but that was a few years ago and i never followed them.

nukemaster · Aug 3, 2014

SgtStiffler :

Corsair does not seem to list a hybrid fan mode on that unit, but most of them use something like 20-30% before requiring the fan to kick in.

This is made possible by the higher efficiency of these newer units.

Corsair does list that the fan will not start to get even remotely loud until 50% power is reached. Chances are they also go by actual heat so, if a cool environment the fan can run slower(or stay off longer).

And you will need modified drivers for physx to work for sure. The stock Nvidia drivers lock out physX when any non Nvidia card is installed in the system(this used to and may still include Intel onboard.).

StaticStrength · Aug 3, 2014

So its not possible now. Whats the position GTX 760 compared to R9 280X?

nukemaster · Aug 3, 2014

You can still do it, you just need to use modified drivers.

The 280x is just a hair faster than a 7970 GHZ edition.

Here is a review with several cards and a 760.
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_760/7.html

Does my PSU enough for it?

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