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Old 03-28-2017, 10:42 AM   #1
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Default Can my power supply handle this graphics card?

Hi, I have an i5 2500k, 8gb ram , and im planning to upgrade my graphics card to a radeon 7950 , but my power supply( OCZ500SXS2 )only has one PCI 6.0 connector (I think ,anyway , im really clueless about this stuff so sorry) but I read that the radeon 7950 requires two, so my question is if I get an adaptor , what adaptor will I need and is that a good idea or not? I don't really want to spend any more money on a new power supply too. Thank you.

Picture of my power supply:
https://scontent-lht6-1.xx.fbcdn.net...d0&oe=58DD831C
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Old 03-28-2017, 12:25 PM   #2
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Default Re: Can my power supply handle this graphics card?

You should be okay.

That card pulls a max of 200W
Your chip pulls 95W

You need to get your MoBo, Drive and RAM models (and any other devices) and search their "TDP." Add all those together and if you're under 500W you should be just fine. Within 25W of max, I would recommend upgrading the Power Supply.

There's also a chance that using the 6-pin adapter may cause issues with too much going over a single "rail" or line... but that's rare.
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Old 03-28-2017, 12:38 PM   #3
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Default Re: Can my power supply handle this graphics card?

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Originally Posted by iPwn View Post
You should be okay.

That card pulls a max of 200W
Your chip pulls 95W

You need to get your MoBo, Drive and RAM models (and any other devices) and search their "TDP." Add all those together and if you're under 500W you should be just fine. Within 25W of max, I would recommend upgrading the Power Supply.

There's also a chance that using the 6-pin adapter may cause issues with too much going over a single "rail" or line... but that's rare.
I'm getting below 400W when I add everything, but I read a lot of negative things about using an adapter, are they really that unsafe? I wouldn't want to damage anything
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Old 03-28-2017, 01:07 PM   #4
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Default Re: Can my power supply handle this graphics card?

If your PSU has a single rail, you should be fine. If your PSU has more than one rail, it may cause problems. If single rail, use something like this:

https://www.newegg.com/Product/Produ...w&gclsrc=aw.ds

!EDIT!

If this is your PSU, it has 2 12V rails.... might be a bad idea to get an adapter.
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Old 03-28-2017, 01:20 PM   #5
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Default Re: Can my power supply handle this graphics card?

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Originally Posted by iPwn View Post
If your PSU has a single rail, you should be fine. If your PSU has more than one rail, it may cause problems. If single rail, use something like this:

https://www.newegg.com/Product/Produ...w&gclsrc=aw.ds

!EDIT!

If this is your PSU, it has 2 12V rails.... might be a bad idea to get an adapter.
I'm not sure if it is, I did post a link the original post though of the specs on it but I didn't understand anything from it
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Old 03-28-2017, 02:27 PM   #6
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Default Re: Can my power supply handle this graphics card?

Yea that's it... if you look at the pic you posted, bottom left. "12V1" and "12V2"

I would get rid of that PSU anyway as multiple rails hasn't had the most stable of times.
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Old 03-28-2017, 02:48 PM   #7
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Default Re: Can my power supply handle this graphics card?

Your video card plugs into one slot but take up two slots because of its size.
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Old 03-28-2017, 03:09 PM   #8
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Default Re: Can my power supply handle this graphics card?

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Originally Posted by iPwn View Post
Yea that's it... if you look at the pic you posted, bottom left. "12V1" and "12V2"

I would get rid of that PSU anyway as multiple rails hasn't had the most stable of times.
I've had it for years without any problems, so the 7950 is a no go with that PSU?

---------- Post added at 02:09 PM ---------- Previous post was at 02:08 PM ----------

Quote:
Originally Posted by Celery View Post
Your video card plugs into one slot but take up two slots because of its size.
Why is that relevant? I'm not being rude I'm just really not good with this stuff, pretty clueless
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Old 03-28-2017, 03:17 PM   #9
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Default Re: Can my power supply handle this graphics card?

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I've had it for years without any problems, so the 7950 is a no go with that PSU?
It's not a "No Go" by any means. PSU's with multiple rails have been known to cause issues back in the day. Basically, splitting the lines (main lines) can cause inequalities in electrical output. So it can "rob peter to pay paul" so to speak, which in terms of throughput can cause damage.

Those issues could have since been fixed and you may get along just fine. If you've never had problems then you may very well not have any issues at all... it's just not something I can recommend with certainty without doing a lot more research into the technology as of late.
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Old 03-28-2017, 03:20 PM   #10
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Default Re: Can my power supply handle this graphics card?

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Originally Posted by iPwn View Post
It's not a "No Go" by any means. PSU's with multiple rails have been known to cause issues back in the day. Basically, splitting the lines (main lines) can cause inequalities in electrical output. So it can "rob peter to pay paul" so to speak, which in terms of throughput can cause damage.

Those issues could have since been fixed and you may get along just fine. If you've never had problems then you may very well not have any issues at all... it's just not something I can recommend with certainty without doing a lot more research into the technology as of late.
So if I was to go ahead with it and take the risks(which I'm really mind boggled about at the moment because of various opinions) , I need a 6 pin to 2x 6 pin splitter?
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Old 03-28-2017, 03:37 PM   #11
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Default Re: Can my power supply handle this graphics card?

From my understanding;
  • The 7950 takes two 6 pin power connectors
  • Your PSU has only one
Therefore:
  • You need an additional 6 pin power connector
The one I linked above will take power from two Molex connectors and provide power to a single 6 pin. If you have two Molex available, that should do the trick.
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Old 03-28-2017, 03:48 PM   #12
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Default Re: Can my power supply handle this graphics card?

Quote:
Originally Posted by iPwn View Post
From my understanding;
  • The 7950 takes two 6 pin power connectors
  • Your PSU has only one
Therefore:
  • You need an additional 6 pin power connector
The one I linked above will take power from two Molex connectors and provide power to a single 6 pin. If you have two Molex available, that should do the trick.
How do I know if I have two molex available? Sorry for all the trouble but I'm clueless, thank you very much for your help so far.
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Old 03-28-2017, 04:15 PM   #13
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Default Re: Can my power supply handle this graphics card?

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Originally Posted by dariforest View Post
Why is that relevant? I'm not being rude I'm just really not good with this stuff, pretty clueless
It's not, I misread your post.
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Old 03-28-2017, 04:31 PM   #14
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Default Re: Can my power supply handle this graphics card?

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How do I know if I have two molex available? Sorry for all the trouble but I'm clueless, thank you very much for your help so far.
Pop open the case and see if there are two of these available to use the adapter.
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Old 03-28-2017, 04:58 PM   #15
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Default Re: Can my power supply handle this graphics card?

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Pop open the case and see if there are two of these available to use the adapter.
these are the only things I see that aren't plugged into anything, baring in mind that my old 6850 card is still plugged in
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Old 03-28-2017, 05:24 PM   #16
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Default Re: Can my power supply handle this graphics card?

Just so you know, posts by newer members containing links go to review first. So if you post and don't see it, that's why. A mod has to approve... helps us keeps the spammers at bay.

Those two similar ones are molex. If you look at the adapter I linked, that's exactly what you need to plug in that video card (and the other 6-pin).
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Old 03-28-2017, 05:28 PM   #17
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Default Re: Can my power supply handle this graphics card?

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Originally Posted by iPwn View Post
Just so you know, posts by newer members containing links go to review first. So if you post and don't see it, that's why. A mod has to approve... helps us keeps the spammers at bay.

Those two similar ones are molex. If you look at the adapter I linked, that's exactly what you need to plug in that video card (and the other 6-pin).
Gotcha, you've been extremely thankful, cheers
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Old 03-28-2017, 05:39 PM   #18
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Default Re: Can my power supply handle this graphics card?

Cheers! Best of luck and let us know how it goes.
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Old 03-29-2017, 05:56 AM   #19
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Default Re: Can my power supply handle this graphics card?

Multiple rails is like splitting up the circuit in your house if I'm honest. Personally I think it should be fine.

Your graphics card requires 30A on the 12V rail and your PSU provides 18A on 12V1 and 18A on 12V2 which should be more than sufficient. OCZ is a reasonable brand so it shouldn't be a problem.

The only questionable part of this would be using an adapter to get your second PCI-E 6 pin plug. I used a dual molex to PCI-E 8 pin plug for a while and it worked fine, but there doesn't seem to be an overall consensus online as to how good these adapters actually are... however, if you're looking to use an adapter, then you'd be looking for a "Dual Molex to PCI-E 6 pin" adapter. Avoid the single molex variants as these won't be capable of providing the 6 pin plug with sufficient power under heavy use. Molex only supply up to approximately 60W, whereas PCI-E 6 pin can provide up to 75W.

EDIT: Ah, didn't read the second page, my apologies.
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Old 04-01-2017, 05:21 PM   #20
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Default Re: Can my power supply handle this graphics card?

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Cheers! Best of luck and let us know how it goes.
Update: I've installed the card and everything seems to be working correctly, however I have noticed my CPU got up to 97 degrees celsius while playing some of the more demanding games. It stayed at a steady 75-80 when playing the new resident evil however. When not playing any games it hits about 60-65 degrees, I'm not sure if it was like that before. Is there anything I could do excluding buying a new fan to improve this high temperature? The GPU doesn't get this hot, hits about 80 at the demanding games
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