You've got issues - if somebody buys a card rated for 1.2 GHz and won't run there, they should return it and get a refund.
The person started with money, wanted the best cheap video card they could get so purchased one, and your advice is apparently to go back to the initial condition with no further recommendation as to how any other choice is or could possibly be any better.
In other words, you dont understand the point. When you buy cheap stuff, you get cheap stuff. The subtopic here is how to deal with the fact that you have cheap stuff.
I have assembled multiple computers for my father over the years, and each time he selects and orders the parts, and each time he ends up with a real stinker part somewhere because he literally selects the cheapest possible motherboard, the cheapest video card, and so on. You offer no improvement to his strategy because returning parts just costs more money.
The solution is to downclock where necessary, avoid using the bad usb ports, and so on. Thats it. Thats the solution. You havent offered one. You have your head in the sand.