Good day.Sorry for bad English language.Installed 4 GB of RAM,Windows displays the following "Installed memory(RAM) 4 GB (3,50 GB usable)"Why is this?

giedriusss - Are you using the 32 bit or 64 bit Windows 7 RC? If it's the 32 bit, it's normal.

I use 64-bit Windows 7 RC.Used the 64-bit Vista, all was well used by all 4 GB of RAM

I use 64-bit Windows 7 RC.Used the 64-bit Vista, all was well used by all 4 GB of RAM no answer?

Are you using the "remap memory" option of your BIOS? If not, a x64 system with only 4 G of RAM may behave like a x86 system (what memory concerns).Mobile AMD64 3000+, VIA Apollo K8T800 chipset, 1 G RAM, ATIRadeonMobility 9700, 20x DVDRW, C:XPSP3 (55G),D:WIN7 (25G),F:DATA (250G)

how to set? Are you using the "remap memory" option of your BIOS?

Well, if your BIOS supports remapping there should be an option "Remap Memory" or "Enable Remapping" or something like that. Set it to "Enabled", and done. Unfortunately there's no guarantee that your BIOS has such an option, even if you have a x64 CPU and a x64 OS. You may have to look for a BIOS update. If there isn't one, hmm...Mobile AMD64 3000+, VIA Apollo K8T800 chipset, 1 G RAM, ATIRadeonMobility 9700, 20x DVDRW, C:XPSP3 (55G),D:WIN7 (25G),F:DATA (250G)

Sorry, I don't understand your question. Please explain again.Mobile AMD64 3000+, VIA Apollo K8T800 chipset, 1 G RAM, ATIRadeonMobility 9700, 20x DVDRW, C:XPSP3 (55G),D:WIN7 (25G),F:DATA (250G)

Sorry wrong question.

Maybe you can explain more about BIOS settings "Remap Memory" or "Enable Remapping" ????