is there any diffrence from the xfx r7 240 http://www.amazon.com/RADEON-240-PCIE-2GB-DDR3/dp/B00FSC5JKG/ref=sr_1_6?ie=UTF8&qid=1391043900&sr=8-6&keywords=XFX+Radeon+R7+240and the msi r7 240http://www.newegg.ca/Product/Product.aspx?Item=N82E16814127765 or just the brand is the proformance the same and is it true they both only require 30 watts power?thanks in advance