Tengo una placa base matsonic MS9147C que monta una memoria de 512 Mb con la siguiente referencia Twinmos PC2700 (CL2.5) 512 MB DDR-DIMM y he querido ampliarla, para lo que he comprado otra tarjeta de memoria de la misma marca y características.
El caso es que cuando monto las dos tarjetas y tras resetear la CMOS, los programas empiezan a fallar y a veces se producen pantallazos azules y tengo que reiniciar.
Y si monto una de las placas solas, cualquiera de las dos, la nueva o la vieja , el Pc funciona perfectamente ( sin importar el slot donde la ponga). Solo fallan si están las dos puestas.
Si alguien puede ayudarme, le estaría muy agradecido.
Muchas gracias de antemano.
He copiado un fragmento del manual de la placa base, por si servía de ayuda:
Cita:
Installing Memory Modules
This mainboard accommodates 168-pin 3.3V/184-pin 2.5V
unbuffered SDRAM memory modules. The memory chips must be
standard or registered SDRAM (Synchronous Dynamic Random
Access Memory).
The CPU supports 100/133MHz system bus. The SDRAM DIMMs
and DDRs can synchronously work with 100 MHz or operates over
a 133 MHz system bus.
You must install at least one memory module in order to use
the mainboard, either SDRAM or DDR SDRAM, but you
cannot use them simultaneously.
DDR SDRAM provides 800 MB/s or 1 GB/s data transfer
corresponding with the bus 100 MHz or 133 MHz. It doubles the
rate to 1.6 GB/s and 2.1 GB/s by transferring data on both the
rising and falling edges of the clock. DDR SDRAM uses additional
power and ground lines and requires 184-pin 2.5V unbuffered
DIMM module rather than the 168-pin 3.3V unbuffered DIMMs
used by SDRAM.
DIMM1
DIMM2
DDR1
DDR2
JBAT1: Clear CMOS Jumper
Use this jumper to clear the contents of the CMOS memory. You
may need to clear the CMOS memory if the settings in the Setup
Utility are incorrect and prevent your mainboard from operating.
To clear the CMOS memory, disconnect all the power cables from
the mainboard and then move the jumper cap into the CLEAR
setting for a few seconds.
Function Jumper Setting
Normal Short Pins 1-2
Clear CMOS Short Pins 2-3
JP1A1, JP1B1: CPU Clock
This jumper enables to select CPU frequency.
CPU Clock JP1A1 JP1B1
100M Short Pins 1-2 Short Pins 2-3
133M Short Pins 2-3 Short Pins 1-2
JP1: DRAM Voltage (VCC)
This jumper enables to select voltage of DRAM.
Function Jumper Setting
2.5V (DDR) Open Pins 1-2
3V (SDR) Short Pins 1-2
J2A/B/C/D, J3A/B/C/D: DDR/SDR DRAM Type Selector
This jumper enables to select the type of DDR or SDR
DRAM.
Function Jumper Setting
DDR1,DDR2 Short all J2A/B/C/D and J3A/B/C/D pins
DIMM1, DIMM2 Open all J2A/B/C/D and J3A/B/C/D pins
JP2: Wake on Keyboard/USB activity
This jumper enables any USB keyboard activity to power up
a system previously in a standby or sleep state.
Function Jumper Setting
5V Short Pins 1-2
5VSB Short Pins 2-3
J13: Flash ROM Voltage (VCC)
This jumper enables to select voltage of flash ROM.
Function Jumper Setting
5V Short Pins 1-2
3V Short Pins 2-3
JP4: Flash ROM Size
This jumper enables to select size of flash ROM.
Function Jumper Setting
2M Short Pins 1-2
4M Short Pins 2-3
This mainboard accommodates 168-pin 3.3V/184-pin 2.5V
unbuffered SDRAM memory modules. The memory chips must be
standard or registered SDRAM (Synchronous Dynamic Random
Access Memory).
The CPU supports 100/133MHz system bus. The SDRAM DIMMs
and DDRs can synchronously work with 100 MHz or operates over
a 133 MHz system bus.
You must install at least one memory module in order to use
the mainboard, either SDRAM or DDR SDRAM, but you
cannot use them simultaneously.
DDR SDRAM provides 800 MB/s or 1 GB/s data transfer
corresponding with the bus 100 MHz or 133 MHz. It doubles the
rate to 1.6 GB/s and 2.1 GB/s by transferring data on both the
rising and falling edges of the clock. DDR SDRAM uses additional
power and ground lines and requires 184-pin 2.5V unbuffered
DIMM module rather than the 168-pin 3.3V unbuffered DIMMs
used by SDRAM.
DIMM1
DIMM2
DDR1
DDR2
JBAT1: Clear CMOS Jumper
Use this jumper to clear the contents of the CMOS memory. You
may need to clear the CMOS memory if the settings in the Setup
Utility are incorrect and prevent your mainboard from operating.
To clear the CMOS memory, disconnect all the power cables from
the mainboard and then move the jumper cap into the CLEAR
setting for a few seconds.
Function Jumper Setting
Normal Short Pins 1-2
Clear CMOS Short Pins 2-3
JP1A1, JP1B1: CPU Clock
This jumper enables to select CPU frequency.
CPU Clock JP1A1 JP1B1
100M Short Pins 1-2 Short Pins 2-3
133M Short Pins 2-3 Short Pins 1-2
JP1: DRAM Voltage (VCC)
This jumper enables to select voltage of DRAM.
Function Jumper Setting
2.5V (DDR) Open Pins 1-2
3V (SDR) Short Pins 1-2
J2A/B/C/D, J3A/B/C/D: DDR/SDR DRAM Type Selector
This jumper enables to select the type of DDR or SDR
DRAM.
Function Jumper Setting
DDR1,DDR2 Short all J2A/B/C/D and J3A/B/C/D pins
DIMM1, DIMM2 Open all J2A/B/C/D and J3A/B/C/D pins
JP2: Wake on Keyboard/USB activity
This jumper enables any USB keyboard activity to power up
a system previously in a standby or sleep state.
Function Jumper Setting
5V Short Pins 1-2
5VSB Short Pins 2-3
J13: Flash ROM Voltage (VCC)
This jumper enables to select voltage of flash ROM.
Function Jumper Setting
5V Short Pins 1-2
3V Short Pins 2-3
JP4: Flash ROM Size
This jumper enables to select size of flash ROM.
Function Jumper Setting
2M Short Pins 1-2
4M Short Pins 2-3
