I wants to know, can I upgrade to Segate Model ST3500641AS-RK SATA 3.0Gb/s 500 GB from 40 GB?. Did the motherboard and the Bios supports.? Thanks.

As we do not know what PC Architecture you have, the heading lacks any information as does your post, it is impossible to tell. By the way my Crystal Ball has run out of credit!

Babuk Do you even have SATA controllers on your motherboard? Post the model for a more definitive answer. Does your WinXP CD have any service packs included?

Thanks for all of your post. I am not having SATA only IDE is available. This is the model of my mother board http://www.mercury-pc.com/product-d... Mercury KOB P4M266 NDFSMX Intel Pentium 4 (478 pins) Mainboard w/VIA P4M266(NB) & VT8233(SB) Description - Pentium 4 Mainboard with VIA P4M266 Chipset Design Processors - Socket 478 supports the Intel Pentium 4 processor(478pins) Chipset - VIA P4M266(NB) & VT8233 (SB) * P4M266 V-Link Host system controller and VT8233 V-Link Client to PCI/LPC bridge * Peak Bandwidth 266MB/S 8-bit V-link Host Controller * Integrated Savage 4 2D/3D Video Accelerator - LPC I/O ?IT8705F - AC97 Audio Codec * Compliant with AC97 2.2 specification System BIOS - AMI 2Mb Flash EEPROM - Supports Plug and Play 1.0A, APM 1.2, Multi Boot, DMI - Full support for ACPI revision 1.0 specification Memory - 2 DDR DIMM Sockets and 2 DIMM sockets support (can not be used simultaneously) * Two 184-pin 2.5V DDR SDRAM (DDR266/200) or * Two 168-pin 3.3V SDRAM (PC133/PC100) - Maximum: 2GB (DDR SDRAM or SDRAM) I/O Interface - Supports Plug and Play function - PS/2 keyboard and PS/2 mouse connectors - Dual USB Ports and an optional LAN connector - One - EPP/ECP mode parallel port - One - 16550 high-speed serial I/O ports - VGA Connector - Audio Ports (Line-in, Line-out, Mic-in, CD-in and game port) - Dual PCI IDE interfaces - support four IDE devices (PIO mode 4, DMA Mode 2, Ultra DMA 66/100) - Supports 360K~2.88M Byte, 3 Mode FDDs or LS120 - ATX Power Supply Connector - Ports, headers and others * IrDA header * Four additional USB Ports (USB1 and USB2) * Front Panel MIC/Line-Out Header * HDD LED, ACPI MSG LED, Reset Switch, Power Switch headers * CPU and System Fan headers * LAN Card Wake Up/Modem Ring Wake-Up headers RTC & Battery - VT8233 included 256 byte of CMOS - With CMOS hardware clear jumper Expansion Slots - 2 PCI slots, 1 AGP slot, 1 CNR slot Form Factor & Layers - microATX (244mm x 244mm), 4 Layers

It is highly likely your motherboard is 48bitLBA compliant but since it does not have any SATA ports why would you be asking about connecting a SATA drive? You could only do this with a SATA controller card plugged into an available PCI slot. In your situation I would suggest you stick with an IDE drive. You only have two available PCI slots and tying one of them up with a drive controller card might not be the best use you could put it to. Goin' Fishin' (Some day)