Hi! I own a Compaq Presario computer with an AMD Sempron processor and 2 GB RAM installed. There are only two available slots for RAM, and the computer was advertised as being upgradable to 4 GB. Can anyone tell me the most powerful processor AMD processor I can upgrade this computer with, as well as the best memory (2-2G sticks) to use?? Here are the MOBO specs... Motherboard description Motherboard manufacturer's name: Asus M2N68-LA HP/Compaq name: Ivy8-GL6 CPU/Processor Socket: AM2 Supports the following processors: Athlon 64 X2 with Dual Core technology Athlon 64 Sempron Front-side bus (FSB) 2000MT/s (2.0 GT/s) Chipset NVIDIA GeForce 6150SE nForce 430 BIOS features System BIOS core brand: Award Keyboard combination to used to enter BIOS: F10 Form factor Micro-ATX: 9.6 in X 9.6 in Memory Dual channel memory architecture Two 240-pin DDR2 DIMM sockets Supported DIMM types: PC2-4200 (533 MHz) PC2-5300 (667 MHz) PC2-6400 (800 MHz) Non-ECC memory only, unbuffered Supports 2GB DDR2 DIMMs Supports up to 4 GB* 32 bit PCs cannot address a full 4.0 GB of memory. NOTE: *Actual available memory may be less Expansion slots Two PCI One PCI Express x16 graphics (for graphics card) One PCI Express x1 (for cards such as network, sound, tv-tuner) Video graphics Integrated graphics using nVidia GeForce 6150SE Up to 256MB of system memory (with 512MB or more system memory) Also supports PCI Express x16 graphics cards NOTE: Either integrated graphics or the PCI Express x16 slot are usable at one time; they are not usable concurrently. Parallel ATA One 40-pin UltraDMA 100/66/33 connector Supports PIO, multi-word DMA modes Supports two PATA disk drives on one PATA ribbon cable (two drives total) Serial ATA Two SATA connectors: SATA1 = Black SATA2 = White Supports 1 SATA 150 or SATA 300 disk drive on each SATA connector Speed up to 1.5Gb/sec or 3.0Gb/sec, complying with SATA 1.0 and SATA 2.0 specifications NOTE: The faster rate of 3.0Gb/sec requires that both the hard drive and the motherboard support it. If one or the other does not support 3.0 Gb/sec, the system negotiates down to the slower 1.5 Gb/sec. RAID Not currently supported by HP PCs using this motherboard. Onboard audio 6 channel high-definition audio Audio CODEC: ALC888 Onboard LAN 10/100Mbps LAN PHY PCI Realtek RTL8201N Onboard USB USB 2.0 Eight ports total four connectors on back panel additional headers on motherboard support 4 additional ports/devices NOTE: Some USB ports may not be available externally for customer use. For more information, see model specifications. Back panel I/0 One PS/2 mouse port (green) One PS/2 keyboard port (purple) One VGA port Two USB 2.0 One RJ-45 networking port Three Stereo-mini audio jacks for: Line-in (light blue) Line-out (lime) Microphone-in (pink) Internal connectors One 24-pin ATX power connector One 4-pin ATX power connector One PATA connector Two SATA connectors One floppy drive connector Two 12v fan connectors for CPU fan and PC fan One 9-pin header for power button, reset button, power LED, and HDD LED One line input connector (interupts line input on back panel, Vista capable, requires matching front audio jack module) One 9-pin audio header for headphone-out and microphone-in (yellow, Vista capable, requires matching front audio jack module) Two USB headers supporting 4 additional USB 2.0 ports or devices One Intel high-definition Audio/Modem Link (Not used by HP) One jumper for resetting BIOS settings One jumper to disable BIOS password checking Thanks a bunch!!!!