I Have an Older Dell 330 Optiplex running win10 I have upgraded the Processor to a dual core E-8400 3gb ,increased the memory to 4 gb and 775 motherboard also G33/G31 Chipset Family. i want to get better graffix for playing on line gamming what do i need to do running firefox also chrome and edge seems there is an internal problem too slow and sometimes too jerky fast need some help thanks