Actualizar placa base con un micro nuevo

esta es mi placa base:

SL-75FRV

Processor
- Supports Socket-A AMD processors (Athlon/Duron)
- Supports FSB 200/266/333MHz
KT400 Chipset
- Northbridge VT8377
- Southbridge
- VT8235
System memory
- Three 184-pin slots for DDR SDRAM DIMM
- Maximum memory capacity 3GB DDR SDRAM
- Support for PC1600/PC2100/PC2700/PC3200 memory
Graphics
- AGP slot, supporting the 8x/4x modes
Overclocking Options
- Three 32-bit PCI 2.2 slots
- Six USB 2.0 ports (two integrated and four external ports)
- Integrated audio AC'97 v2.2
- LAN controller RTL8100 (optional; available on the 75FRV-L only)
Overclocking options
- Processor/memory /AGP voltage variable, multiplier adjustable;
- FSB adjustable in 1MHz increments between 100 and 200 MHz
- RedStorm Overclocking Technology
Disk subsystem
- Integrated UltraDMA/133 IDE controller (2 channel UltraDMA133/100/66/33 Bus Master IDE with support for up to 4 ATAPI-devices)
- Support for LS-120 / ZIP / ATAPI CD-ROM
BIOS - 2MBit Flash ROM
- Award BIOS with support for Enhanced ACPI, DMI, Green, PnP Features
Miscellaneous - One FDD port, two serial and one parallel ports, ports for PS/2 mouse and keyboard
- IR port (integrated IrDA TX/RX socket)
- Support for Smart Card Reader: PS/SC-compatible Smart Cards Reader
Monitoring - Processor & chipset temperatures, voltages and fan rotational speeds monitoring
- A.B.S. II technology
Power management - ACPI/APM
- Wake-up from modem, mouse, keyboard, LAN and USB
Power - Standard 20-pin power supply socket ATX (ATX-PW)
Dimensions - ATX form factor, 305mm x 225mm (12" x 8.7")


Me gustaria saber cual es el maximo procesador que puedo poner, gracias

Gracias!

Y supongo que tendra que ser un Athlon XP, o hay algun equivalente mas moderno en el mercado que sirva?

no lo he mirado, pero supongo que debe ser complicado a estas alturas encontrar athlones XP por las tiendas a estas alturas.