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Intel Ivy IGP memory BIOS options

post #1 of 3
Thread Starter 
My Z77 DS3H BIOS gives these options ~


1) Internal Graphics Memory Size
Allows you to set the onboard graphics memory size. Options are: 32M~1024M. (Default: 64M)

2) DVMT Total Memory Size
Allows you to allocate the DVMT memory size of the onboard graphics. Options are: 128M, 256M, MAX.
(Default: MAX)

Does this mean there are two sets of memory for the IGP - on that is on the IGP, and also the system RAM which is used for DVMT ?

How do I find what is the maximum memory for 1) for the i5 3470s ?
The Watt Gobbler
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The Watt Gobbler
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post #2 of 3
There is no RAM on the IGP. It only uses system RAM.

Internal Graphics Memory Size is the MINIMUM amount of video RAM the IGP is allocated at all times.

DVMT is the amount of dynamic video memory that can be allocated in addition to the IGMS setting when the IGP requests it.

For example, if you set the IGMS to 128MB and set the DVMT to MAX, it will reserve a minimum of 128MB when your system is doing nothing (e.g. sitting at a desktop) and will go up your IGP's maximum allocation amount when running a demanding game, etc.

I believe the general recommendation is set the IGMS to the "minimum" amount, and the DVMT to the "maximum" amount if you're running Windows 7/8, etc. with a fully IGP-aware graphics driver.

Allocating more RAM to the IGP might be useful if you're running out of texture memory with the DVMT on "max". It won't however give you any better performance, and in some cases may REDUCE performance by forcing the IGP to register more system RAM that isn't necessarily utilized.

Greg
post #3 of 3
Thread Starter 
Brilliant answer - why don't they pay you to write those crappy manuals instead. thumb.gif
The Watt Gobbler
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The Watt Gobbler
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