06-09-2009 05:22 AM
I'm curious if there is a way, to increase my system video memory from the default 96mb, to 128mb or more, sience I still have 1155mb shared system memory. In a few case I would prefer more than 96, but there no increase option in bios nor in the driver settings.
06-10-2009 10:40 AM
06-10-2009 11:51 AM
I'm testing win7 now, and I've got a good reason to think (or I'm almost sure), that the default 92mb vram (32 dedicated + 64 shared) in't enought however I can't allocate manually more shared memory to the vga.
With the default w7 driver, the OS dosen't get any of the shared memory (so the system is running only with the dedicated 32mb), most likely because of that the display becomes choppy/dizzy like this. If I update the driver with the vista driver the vga gets 96 mb vram and this crahes greatly decreasing. After I switch to the classic win theme, they almost gone, exept if I playing videos with DXVA acceleration or 720/1080p movies.
But I'm about to give this up, I've search the internet for a whole day, but didin't find any way, to overdirve the driver settings.
06-16-2009 09:12 PM
Minimum Graphics Memory: 32 MB
Maximum Graphics Memory: 1283 MB
Graphics Memory in Use: 99 MB
that is what i am seeing right now in windows vista sp2
driver memory footprint didnt do anything.
most manufacturers have the setting in the bios, but i did not find an option to specify memory footprint of the gpu in the bios of the T400. i have the most up to date bios as well, and i didnt see it in the bios version i had before.
i would also like to know how its 32mb+64 mb, i am seeing full DMVT control here.
I Also get artifacts in windows 7, in vista while playing some games, and when playing videos with DXVA acceleration. it is VERY annoying.
i would like to have a fix for this too.
08-08-2009 12:16 AM
08-08-2009 12:39 PM
Yeah, i fixed it.
The issue is with the intel controller, the way it handles ram more specifically.
when there is a unmatched pair of different size memory modules, the controller does not handle the dual channel perfectly, and given that the intel controller uses the system ram as graphics ram, there are visual artifacts.
tried 1gb+2gb = artifacts, 1gb+1gb perfectly fine, 2gb+2gb perfectly fine.
this does bug me as a resolution because it means that i'll need to jump straight to 8gb (2x4gb) and cant go to 6gb without having artifacts.
08-08-2009 02:23 PM - edited 08-08-2009 02:29 PM
With the first (126.96.36.1992) intel driver it works fine under 32-bit vista and w7, so probably a bios or a driver update will fix this issue.
Anyway, thanks dragon-fly for your observation, I might consider to replace my 1gb module.
08-08-2009 07:58 PM