If I unstall DDR400 memory as as follows: DDR1 & DDR3 : 512MB each DDR2 & DDR4 : 256MB each making 1.5 GB in total, will dual channel technology be activated?

1) Total maximum amount for motherboard is 2GB.

2) There are 2 Ram Memory slots.

3) Maximum amount for EACH ram memory slot is 1GB.

Either DDR Sdram at 266MegaHertz, or 333MHz, or 400MHz.
PC2100, PC2700, and PC3200, respectively.

http://www.asrock.com/mb/VIA/P4VM8/

There is no DDR1 and DDR2 slots, in a manner of speaking.

May be marked on your motherboard that way, but stating it that way on a computer product support website = No.

You're going to make someone think, you don't know what you are talking about.

They may think you are referring to DDR Sdram, and DDR2 Sdram, and they know the motherboard only uses DDR Sdram ram memory.

Suggest state Slot 1 and Slot 2; or DIMM 1 and DIMM 2.

For additional questions please post in a Comment.

Regards,
joecoolvette

RAM / Max RAM Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support) RAM / Max RAM Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support) RAM / Max RAM Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support) RAM / Max RAM Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support)Max RAM: Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support) This is the kind of memory you need, no matters the branch

512 MB of DDR2 533 MHz system memory, upgradeable to 2 GB using two soDIMM modules (dual-channel support)

Yes its possible
Yes but the memory its going to run at slow speed 533Mhz

check the laptop specifiction from the Acer website....

Your laptop's RAM is upgradeable to up to 4 GB using two DDR2 533/667 MHz SODIMM modules.

So your upgrade options here are:
1. Buy a 1 GB DDR2 533/667 MHz SODIMM module & install it to get a total RAM of 2 GB (Price around US$ 25).
2. Buy a 2 GB DDR2 533/667 MHz SODIMM module & install it to get a total RAM of 3 GB (Price around US$ 45).

DDR400 dual channel.

max ram per slot is 1gb, for 2GB total. A 2 GB module will not work

http://www.crucial.com/store/listparts.aspx?model=Aspire%204315

You may install up to 4GB of DDR RAM in this motherboard. It does not use DDR2.

This is from your manual:

Dual-channel DDR400 memory support
Employing the Double Data Rate (DDR) memory technology, the motherboard supports up to 4GB of system memory using DDR400/333/266 DIMMs.

If you would care for the manual, here is a link:

Asus P5P800-VM Manual

Thanks for using Fixya.

here are the specifications of *********** board go through it...
Processor Support Intel® Pentium® 4 processor, Intel® Celeron® D processor and Intel® Celeron® processor in the 478-pin package
Note: It is important to verify supported processors before using this Intel® desktop board. Supported front side bus speed 800, 533, and 400 MHz Integrated Graphics Intel® 865G Chipset with Intel® Extreme Graphics 2 Chipset Intel® 865G Chipset AGP Connector AGP 3.0 (4X & 8X Speed 1.5 and 0.8 Volt Only) Memory Type Dual Channel DDR 400 MHz (PC3200), 333 MHz (PC2700), and 266 MHz (PC2100).
Note: Be sure to review important memory and system bus speed considerations before using this Intel® Desktop Board Max Memory Capacity of up to 4 GB Memory Slots 4 DDR DIMM Sockets Slots 6 PCI
So it will support DDR2 and you can upgrade upto 4GB...

Solution:



i)  LOW DENSITY modules have 100% compatiility with ALL systems and ALL chipsets.
    HIGH DENSITY modules only have 10% compatibility

    here compatablity means LOW DENSITY RAM are accepted by all system(100%)  or any make           system.. HIGH DENSITY RAM are accepted by 10% by only some system or computers...


ii) in order to check system performance or amount of Computer RAM usage press the ctrl+alt+del
   simultaneously a new window(window task manager) will appear showing:

    CPU usage: showing the amount of CPU or processor utilized at that particular time.
    PF usage: showing the amount of RAM memory utilized at that particular time.
    Physical Memory: showing Total RAM Memory, Available Ram memory....

iii) baiscally they are two types of RAM they are:

    DDR1:which is older one supported by older system  or older mother boards which is costlier
    DDR2: which is latest one supported by all new system or new mother boards which is less                         costlier

    DDR: double data rated ram......which will send data at a double rate compared to SD RAM

iii) here color doesnt matter, these slots either support DDR1 or DDR2 but not both at a time
    
    DDR1 has 184 pins or gold plated pinssss... on the edge of the RAM
    DDR2 has 240 pins 

    so difference doesnot allow DDR2 to placed in DDR1 motherboards or vice versa...

iv) it does have anything to do with no of chips on the RAM but they only differ whether it is DDR1 OR DDR 2(DDR2 are much faster than DDR1)

NOTE: whatever may the the RAM, each RAM has FSB(called Frequency...) which determines the frequency of rate at which data is tranferred from RAM to processor(CPU)  usually in MHZ such as FSB 300, 400, 200 , 333...................

more the FSB the faster data is transferred to the processor(CPU)

dont worry even RAM with less FSB's work well with the processor....having 1 GB RAM or 2 GB RAM is engouh, it only matters with the speed of CPU ... but not RAM......