Sufficient PSU for gtx 550 ti?

[Shadowguy]

I just got a gtx 550 ti for my ageing computer. I don't consider over clocking but I'm worried my PSU isn't good enough.

I have a generic psu with a weird brand, Penguin. It is a 500 w psu with a continuos total output of 500w (dont know what that means).
The specs:
+5v. +12v1. +12v2. +3.3v -12v. +5Vsb
28a. 18a. 18a. 26a. 0.3a. 2a
The combined power of +5v and +3.3v is 200w.
I've tried doing my maths, 500w-200w=300w
300-(5x2)=290. 290/12=24 1/6.
The required amps for the gtx 550 ti is 24amps but I have a feeling I'm doing something incorrect.
Is this PSU good enough to power the card? Thanks to anyone who has an answer

 

[rolandzhang3]

What's the combined +12v rail amperage? that PSU should be enough to power a 550 Ti though

 

[GhosT_Hv]

Ya that PSU is enough actually but low branded psu can cause damage of hardware , so be careful.

 

[Shadowguy]

What's the combined +12v rail amperage? that PSU should be enough to power a 550 Ti though

That's the problem. It doesn't indicate the combined amperage of the +12v rails. I don't want to ruin my whole computer when I test it so I. Just making sure.

 

[rolandzhang3]

Well you don't directly add up the combined rails but it should provide around 30A or so which should have no problem with a 550 Ti

Why the 550 Ti though? you could get a much more efficient 650/7750 or even a 650 Ti/7770 which should put much less stress on your system

 

[Shadowguy]

Well you don't directly add up the combined rails but it should provide around 30A or so which should have no problem with a 550 Ti

Why the 550 Ti though? you could get a much more efficient 650 or 7750 which should put almost no stress on your system

I don't think it will do 30 amps in anyway because it's pretty old and the 5v and 3.3v take up a lot more than the new ones do. I chose the 550 ti because it was on sale. The 7750 was the one to go to before I chose this and I thought my psu was good enough to handle it until I researched a bit more.

 

[rolandzhang3]

Ah that makes sense then, the requirement of 24A takes your other components into consideration as well so it should work

 

[Shadowguy]

I have another question. The graphics card came with a pcie 6pin to 2x molex 4pin. Will it work if I plugged one of the molex into a female molex on its own and the other into a female molex that comes off another cable which is plugged on the DVD drive?

 

[rolandzhang3]

Not too sure about that, as long as the two molex cables you plug into are separate (and not daisy-chained together) it should be fine (no guarantees though), your PSU doesn't have a 6 pin PCI-E connector? that's a real shame :S

 

[Shadowguy]

Not too sure about that, as long as the two molex cables you plug into are separate (and not daisy-chained together) it should be fine (no guarantees though), your PSU doesn't have a 6 pin PCI-E connector? that's a real shame :S

Im not sure if the 2nd one is daisy chained or not. Do u mean the two molex are together or just one of them is with some other random cable. The 2nd molex cable isnt a separate cable though. There is a cable that goes into the DVD drive and the molex comes from the plug (the end) of it.

 

[rolandzhang3]

As long as the two molex cables you are connecting to are separated from each other and not daisychained, it should be fine, though I'm not too sure about the DVD drive part

 

[Shadowguy]

http://www.google.com.au/search?q=molex+cable+coming+off+an+optical+drive&client=safari&hl=en&source=lnms&tbm=isch&sa=X&ei=OnqQUt2uKOaKiQfpmIH4Cw&ved=0CAcQ_AUoAA&biw=1024&bih=672#biv=i%7C5%3Bd%7CW2r7z6OFKwApIM%3A

 

[rolandzhang3]

Well I guess it should be do-able since the two molex cables you'll be plugging into are not on the same connection/wire that leads back to the PSU (forgot the terminology off the top of my head derp)

 

[Shadowguy]

It should work but you need to connect it via 2 molex connectors to get enough amps as i needed with my 500w codegen which i think isnt better that that penquin

Sorry but do you mean the cable is a 6 pin pcie to 2 moles connectors?
http://www.google.com.au/search?q=pcie+6pin+cable&client=safari&hl=en&source=lnms&tbm=isch&sa=X&ei=_Y6QUs6IHsmOiAfnqoC4DA&ved=0CAkQ_AUoAA&biw=1024&bih=672#biv=i%7C1%3Bd%7CwwNuFzYdqtEw2M%3A

 

[Shadowguy]

Ok, thanks. I was worried that my psu couldn't get the 24amps but apparently it can.

 

[rolandzhang3]

Both rails will definitely be enough to supply 24A