Our most affordable build in our recent PC buying guide update caught the attention of many readers. At around $500, it's ideal for every day computing with some lightweight gaming. If you're adding a dedicated GPU, however, it makes sense to swap our APU pick for a cheaper CPU, with the saving going towards graphics. We paired two $70 CPUs with the GTX 960 and R9 285 in 20 of the most popular AAA titles, to find out which one is best for gamers on a budget.