How powerful is my PSU it doesn't have watts written?

[Tsunami Chaser]

Right now my specs are :
Gigabyte H61M-S2P-B3 Motherboard
8 GB RAM at 1333 mhz
i7 2600 Sandy Bridge
2 TB Seagate HDD at 7200 RPM.
HIS HD 6450 2 GB.

So I plan to upgrade my graphics card to Palit GTX 660. So I read that it has more power requirement than HD 6450 so I checked my PSU. But the problem is it doesn't have watts written.
Instead it had it written in volts. It said 220 volts and some boxes below it with different amps.
It was 29 amp 18 amp 30 amp 0.5 amp and then 2 amp.
I am confused about my PSU also my other question is can I connect GTX 660 directly to my motherboard without putting additional wires from PSU because my HD 6450 doesn't have any wires connected to PSU its directly connected to motherboard.

PS : 220 volts and then the amps were written in power output.

 

[jay2577]

can you take a photo of the sticker and post it please?

 

[manofchalk]

Yea, a picture of the PSU's sticker would help.

 

[Dark Lord of Tech]

You don't have enough power to run a 660.

What case are you using?

Prebuilt?

 

[Tsunami Chaser]

I think it is a 450 watts PSU since it has 450 in name.

 

[Dark Lord of Tech]

If you don't see a name , it's probably a generic PSU , I would upgrade.

 

[Tsunami Chaser]

If you don't see a name , it's probably a generic PSU , I would upgrade.

It has a name but my computer case is too dark to read it properly or take a picture.

 

[Dark Lord of Tech]

Did it come with the case?

 

[hunter315]

Somewhere on it you should find a sticker like this

The number you care about is directly under the +12V label, in your case i would suspect it is the 29A or the 30A, either way you have only up to 360W of 12V capacity which is not much considering that a GTX 660 wants ~140W, your CPU will want ~100W, and a normal system wants 50-100W for the Motherboard/drives/fans, so that puts you pretty close to your limit. If you step up to a good 550W unit with 40+ amps available between the 12V rails you can run pretty much any single card setup, a 750W will run most dual card setups, and a good 850W will run any dual card setup.

 

[Dark Lord of Tech]

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($25.99 @ Newegg)
Total: $25.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-24 10:20 EST-0500)

 

[jay2577]

Do you have a torch or a camera with a flash?

If you don't see a name , it's probably a generic PSU , I would upgrade.

It has a name but my computer case is too dark to read it properly or take a picture.

 

[Tsunami Chaser]

Do you have a torch or a camera with a flash?

If you don't see a name , it's probably a generic PSU , I would upgrade.

It has a name but my computer case is too dark to read it properly or take a picture.

Yes I do but even with camera flash its too dark. But I am pretty sure its 450 watts if its not I will buy another PSU. This one is just months old my old's fan stopped working.

 

[jay2577]

Sounds like you should by a new PSU just to be on the safe side