T410s Ram Question. (((Pic warning)))

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arty_harvy · #1 Post by **arty_harvy** » Sat Oct 13, 2012 12:08 pm

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

wolfman · #2 Post by **wolfman** » Sat Oct 13, 2012 12:49 pm

Does your T410s have Intel integrated graphics only? It uses system RAM for graphics memory.

arty_harvy · #3 Post by **arty_harvy** » Sat Oct 13, 2012 2:03 pm

No. it has the Optimus, but I have it set to discrete only.

jayton4 · #4 Post by **jayton4** » Sat Oct 13, 2012 2:29 pm

It is because the Nvidia NVS 3100m uses both dedicated memory and shared memory for graphics.

arty_harvy · #5 Post by **arty_harvy** » Sat Oct 13, 2012 2:41 pm

All computers have the ability to borrow from the ram for graphics purposes when necessary.

W520

jayton4 · #6 Post by **jayton4** » Sat Oct 13, 2012 2:49 pm

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.

emtee3511 · #7 Post by **emtee3511** » Sat Oct 13, 2012 3:49 pm

8gb ram will most likely show 7.90gb available -- that's what several of my machines say, including my T400 and T410i

jayton4 · #8 Post by **jayton4** » Sat Oct 13, 2012 4:02 pm

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.

arty_harvy · #9 Post by **arty_harvy** » Sat Oct 13, 2012 4:51 pm

Resource Monitor says 47 MB reserved on the W520......?

arty_harvy · #10 Post by **arty_harvy** » Sat Oct 13, 2012 8:50 pm

Is there any way to change that value?

mikemex · #11 Post by **mikemex** » Sun Oct 14, 2012 10:17 am

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.

T410s Ram Question. (((Pic warning)))

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