The core clock remains at 650MHz and the DDR3 memory interface has an 1800MHz data rate. Priced at a whopping $70, this GPU comes with 400 SPs and a 128-bit memory bus. The Radeon HD 5570 is a more formidable opponent. The 5450 will set you back $45 at Newegg and is passively cooled. That’s more compute power than the Intel HD Graphics 3000 but less memory bandwidth than a Sandy Bridge if you assume the CPU cores aren’t consuming more than half of the available memory bandwidth.
The SPs run at 650MHz and the DDR3 memory interface has a 1600MHz data rate.
The 5450 is a DX11 part with 80 SPs and a 64-bit memory bus. I dusted off two low-end graphics cards for this comparison: a Radeon HD 5450 and a Radeon HD 5570.
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