bobbytb43 :
clutchc :
Yes, but don't count on it being a real 450W PSU. It's junk.
then what is good ps for my dx-4300-19
Assuming this is your Gateway:
http://www.ascendtech.us/mmASC/Images/gatewayDX430011side.jpg
... and you want a 450W PSU with at least 1 x 6-pin PCIe connector, these are some good choices:
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007657%2050001516%2050001459%2050002177%2050001697%20600014060%204814&IsNodeId=1&bop=And&Order=PRICE&PageSize=30