do i need to upgrade my psu?

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sirstinky
Not sure what PSU the Inspiron 620 has in it, but the GTX 750 doesn't need a PCIe power connector. It gets the 75 W from the PCI express slot. The Core i3 won't use much more power than the 630 dual core Pentium. If you have around a 300 watt PSU in the machine now, it should be fine. I wouldn't go under 250 watts to be safe.
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sirstinky

sirstinky

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Not sure what PSU the Inspiron 620 has in it, but the GTX 750 doesn't need a PCIe power connector. It gets the 75 W from the PCI express slot. The Core i3 won't use much more power than the 630 dual core Pentium. If you have around a 300 watt PSU in the machine now, it should be fine. I wouldn't go under 250 watts to be safe.
 
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