There are many retailers that sell computer parts in the US, both online and in brick-and-mortar stores. Here are a few popular options:

Amazon: Amazon offers a wide selection of computer components and often has competitive prices.

Newegg: Newegg is a popular online retailer that specializes in computer hardware and software.

Micro Center: Micro Center is a brick-and-mortar retailer with several locations in the US that offers a wide selection of computer components at competitive prices.

Best Buy: Best Buy is a popular electronics retailer that offers a variety of computer components, including CPUs, GPUs, motherboards, and more.

B&H: B&H is an online retailer that specializes in a variety of electronics, including computer components.

Fry's Electronics: Fry's Electronics is a brick-and-mortar retailer with several locations in the US that offers a wide selection of computer components.

It's always a good idea to compare prices and read reviews from other customers before making a purchase to ensure that you are getting a good deal and a quality product.
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