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T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 12:08 pm
by arty_harvy
My T410s says 6Gb Ram, 5.86GB usable. WTF? No other system I have owned has had this issue. I have tried Re-installing windows multiple times, which has had no effect. If I install 8GB, It will say 8GB RAM, 7.68GB usable. There has to be something going on in the BIOS of this model in particular that is reserving some RAM, and I am determined to figure it out. Any Ideas?
T61p
W520
T410s
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 12:49 pm
by wolfman
Does your T410s have Intel integrated graphics only? It uses system RAM for graphics memory.
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 2:03 pm
by arty_harvy
No. it has the Optimus, but I have it set to discrete only.
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 2:29 pm
by jayton4
It is because the Nvidia NVS 3100m uses both dedicated memory and shared memory for graphics.
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 2:41 pm
by arty_harvy
All computers have the ability to borrow from the ram for graphics purposes when necessary.
W520
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 2:49 pm
by jayton4
Ok, now I am learning.
From
http://support.microsoft.com/kb/978610
Note The amount of usable memory in the examples are not exact amounts. Usable memory is a calculated amount of the total physical memory minus "hardware reserved" memory.
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 3:49 pm
by emtee3511
8gb ram will most likely show 7.90gb available -- that's what several of my machines say, including my T400 and T410i
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 4:02 pm
by jayton4
emtee3511 wrote:8gb ram will most likely show 7.90gb available -- that's what several of my machines say, including my T400 and T410i
It looks like Nvidia NVS 3100m will give you 141 MB of hardware reserved (which shows 7.86GB usable) while Intel graphics uses 205 MB hardware reserved (and shows the 7.9GB usable).
Check the memory tab from the resource monitor and see how much hardware reserved that W520 shows with 2000m.
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 4:51 pm
by arty_harvy
Resource Monitor says 47 MB reserved on the W520......?
Re: T410s Ram Question. (((Pic warning)))
Posted: Sat Oct 13, 2012 8:50 pm
by arty_harvy
Is there any way to change that value?
Re: T410s Ram Question. (((Pic warning)))
Posted: Sun Oct 14, 2012 10:17 am
by mikemex
This is related to the issue that prevents 32 bit OSes to see more than around 3GB of system RAM, even when in theory they could see 4GB. They reserve some space in the upper section. With 64 bits it's pushed further but it seems like it never disappears.