PNY's D22GX64XL-4 XLR8 2GB DDR2 Desktop Memory Kit enhances performance, reliability and endurance under high-stress conditions. These high-performance memory modules use a custom heat sink with cooling fins, for superior heat extraction and better cooling. The XLR8 memory is SLI Ready, making them certified for use in nVIDIA motherboards. They also have EPP (Enhanced Performance Protection), for top performance and simple installation & configuration. Speed: 800MHz Custom heat sink with cooling fans Latencies: 4-4-4-12 Voltage: 2.1v Recommended motherboard: ASUS P5WDG2 Pro