With new computers costing as little as US$300, consumers would be wise to avoid overspending to upgrade older machines. Nevertheless, a myriad of sub-$100 options exist for increasing PC performance.
Traditional upgrades, such as boosting memory or adding a hard drive or CD burner, remain popular. In addition, users can attempt other risky but potentially rewarding enhancements -- as long as they have the tech savvy to recover from possible disaster.
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