|"....when i install it into laptop no matter what laptop only sees 123gbs of space.... "|
Did you by any chance use a program to clone the original drive - copy the entire data contents on the original drive to the larger drive ?
Some brand name systems have a HPA on the original drive.
Up until now, I thought only Dell did that, on laptop drives at least.
What happens when a hard drive is cloned that has a HPA on it is the larger drive is seen as the size the HPA specifies, if that's smaller than the size of the larger drive, not the actual size of the larger drive, in both the mboard's bios and in Window's Disk Management.
In the cases I've seen so far, when you clone a Dell laptop hard drive that has a HPA to a larger hard drive, the larger hard drive is seen as the same size or close to it that the original drive was seen as.
In the manual for your series it says the max hard drive size the series originally came with was ~ 120 gb. (Hard drive sizes vary a bit from the standard sizes.)
It's quite possible your original drive has a HPA on it that specifies the max size as ~ 120 gb rather than the ~ 80 gb size it was because ~ 120 gb was the max size the series originally came with.
That would have been an advantage for Acer because when they originally loaded the hard drives for the series, they could use data with the same HPA for ~ 40 gb to ~ 120 gb drives, rather than a different set of data with a HPA for each approximate hard drive size.
You can fix the problem.
1710: HPA Makes the Cloned Drive Display Wrong Capacity
After that fix is successful, the bios and Disk Management will see the full size of the drive, but there will probably be a large un-allocated (not software partitioned using FAT32 or NTFS / formatted) space on the drive in Disk Management.
If so, you'll need to use a third party program such as the freeware Easeus Partition Master Home Edition to add the space to an existing partition, if you want to do that, if you don't want to lose the data on the existing partition.