That card isn't low profile though. I believe there was a low profile version of the Radeon HD 5770 made by Gigabyte, that was the most powerful low profile card ever made (or not, Afox and their crazy 6850 variants), but I'm not sure if it is in stock anymore with any major retailer. I'm not aware of any low profile 6670s, but I do believe there is at least one low profile 5670 floating around. I think that one was made by MSI, it had a dual slot cooler. Neither are on newegg or tigerdirect right now. You can try searching around for these rare variants, though you may have to look on the secondary market to find them, I don't think they are in production anymore. Other than that, the best you can get would probably be a low profile 5570 or 6570. If you really need better graphics horsepower, you may need to consider getting a new case and power supply.