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Old computer with 280 watt PSU and 17A on the +12v. Is it safe to put in a geforce GT 730?

post #1 of 2
Thread Starter 
Hey there. I picked up this small form factor computer, used to be an office computer. The Lenovo thinkcentre. One of these:

http://i.ebayimg.com/images/i/331448777537-0-1/s-l1000.jpg

Anyway it's quite an old PSU. The ratings for the various rails are

+3.3v - 18A
+5v - 14A
+12v - 17A

Total Power Rating 280 watts.
There is also a Core 2 Quad q6600 CPU and 2 sticks of 2gb DDR3 ram.
There is a DVD/RW drive which I disconnected to save power.

Now I did a bit of research myself and using the outer vision power supply calculator... putting in a low profile passive card, like a GT 710, should be no problem.
I've been looking at something a bit stonger, with an active cooler:
In particular this card:

https://www.amazon.ca/PNY-GeForce-GDDR5-Graphics-VCGGT7301D5LXPB/dp/B00KYCTCZ8/ref=sr_1_3?ie=UTF8&qid=1471455477&sr=8-3&keywords=gt+730

The thing is it clearly states that it requires a 300 watt power supply with 20A minimum on the +12V rail. The Outer Vision calculator, on the otherhand, seems to think I'll be drawing close to 16A on the 12 V and just under 280 watts total, so my PSU should technically be able to do it, but it's probably pushing it.

So what do you guys think? Is it a bad idea to get the 730 with the fan? I would imagine that 16A on the 12v is way too much for 17A maximum, and that I risk breaking it. But I'm hoping someone will tell me it's probably ok.
post #2 of 2
I would be worried about overtaxing the PSU, especially since its not going to be a new PSU. Most PSUs age quite quickly when ran at their max ratings for any human reasonable length of time. Its possible that it might be fine when surfing the web, but the moment you switch to something demanding, the PSU would fail and possibly take something else with it.

I would recommend replacing the PSU with a new, more powerful unit if you are going to be adding that kind of load to the system.
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