- last post: 01.01.0001 12:00 AM PDT
Posted by: ROBO LEADER
To "someone"...
This is what is a technology that Nvidia uses calld "Turbocache", this allows sharing with the memory dedicated to video on your motherboard to boost the total memory for video. I have a Geforce 7300, usually at 256, but because I have built in video memory of 256, I get a total of 512.
I'm not sure in your situation, but I don't think a "Turbocached' card doubles your videoc cards memory. Usually when an Nvidia card says "Turbocache" (or an ATI card says "Hypermemory") the memory the card says it has is not really what it has,a nd is usually close to half of what it says it is. Does that make sense? If not, I got this information from here .
It does a pretty good job explain video cards specifically for laptops.
Shared video memory is memory the video card borrows from the main system RAM. Shared memory is in no way a substitute for real dedicated memory. It usually does not provide much of, if any, performance gain.
HyperMemory is ATI's version of shared memory. Usually, if a card is advertised as, for example, “256MB ATI Mobility Radeon X1400 HyperMemory”, the video memory is double what it actually has. So the X1400 in this example would actually have 128MB dedicated, and the other 128MB shared from the main system memory.
Nvidia's technology, TurboCache, is more difficult to figure out. For example, a “256MB Nvidia GeForce Go7400 TurboCache” could be half dedicated and half shared as in the ATI example above, but also could be one quarter dedicated and three quarters shared (64MB + 192MB). Of the two technologies, Nvidia's is superior, as part of it is done in hardware; ATI's solution relies completely on software and is considerably slower.
Info swiped ("swiper no swiping!!!) from: http://forum.notebookreview.com/showthread.php?t=39568 (same as link from above).
Cheers.
[Edited on 3/11/2007]