Vista 4GB down to 3GB problem?

Last night vista crashed on me, due to me trying to change themes using 'vista glazz' (which i wont use again) i installed vista again from scratch last night, but when i open up 'My Computer' (Windows + E) it says i only have 2.93GB RAM. i opened up my computer to check if the cards are damaged. I found that none were damaged but i was told that i have to change the RAM settings in 'BIOS' but i dont know how to my motherboard is 'ASUS PB5' PCI-E x16.



Could anyone give me instructions or help/ advice?



Thanks :DVista 4GB down to 3GB problem?
Vista 32bit or 64bit ? The Facts and Only The Facts:



If a PC is installed with 4GB of system memory, the computer itself will register 4GB but Windows Vista/XP will not be able to recognize it all. It's nothing to fret over, this is a normal limitation with 32 bit operating systems. The operating system will report 3.5GB or so, but the ';missing memory'; (varies between 500MB-750MB) is there, reserved for hardware devices.



In Microsoft Windows Vista it is called SuperFetch, and it reserves about 33-50% of system memory for this purpose. Essentially Windows Vista looks at how the computer user accesses application and data, and keeps the most often used applications and tasks loaded into cache memory. This makes loading applications quicker and is supposed to offer users a smoother ride. It does not take system memory away from the OS or applications, if memory demand his high SuperFetch will automatically adjust its size.



Source belowVista 4GB down to 3GB problem?
Please remove all RAM and individualy test each stick in your computer.



Put in one reboot see if it is reconised.Remove then test another.Please make sure you power off the computer before removing your RAM.



Power off computer and open her up either remove BIOS battery for two minutes or use the BIOS reset jumper(4 pins with plastic jumper on two of them)place jumper on other two pins for 2 minutes then replace on origonal ones.



Or enter BIOS and load fail safe and defaults.



On your post screen does it show full RAM?In BIOS does it show all RAM?



Do you get any beep codes on startup?



What is the setup for your RAM in BIOS?



The issue is nothing to do with partitions.
My understanding is that the 32 bit version of XP or Vista will only see 3gb (or in some cases 3.5gb) of ram. So my question to you would be, is it this the 32 bit version? Did you check how much ram was showing before you re-installed? Was the previous version of Vista 32bit or 64bit? Not sure this actually helps you, but it might explain the discrepancy.
Did you delete the first partition,If you did not it will create another and make your capacity smaller