Intel's i865G reserves chunk of system memory either 1, 4, 8 16 or 32 MB in size as its video memory. If necessary, the driver can also allocate up to 32 MB more memory via DirectAGP, the same way an application would. When the additional memory is no longer required, it is released again and made available to the operating system. This puts the chip's maximum available memory at 64 MB. Intel calls this technique "Dynamic Video Memory Technology 2.0."
The Gigabyte GA-8IG 1000 PRO with Intel i865G
The i865G Northbridge
Technical Specifications of the i865G:
256 bit GPU (DirectX7)
Core Frequency: 266 MHz
Memory: 64 MB max.
Available Memory Speeds: Dual-channel DDR266/333/400 (Motherboard settings)