Technical Reference Guide: HP Compaq 8100 Elite Series Business Desktop Computers

Technical Reference Guide www.hp.com 6-3
Integrated Graphics Subsystem
The total memory allocation is determined by the amount of system memory installed in a
system, along with the BIOS settings, operating system, and system load. Table 6-1 shows the
pre-allocation memory amounts.
System memory that has been pre-allocated is not seen by the operating system, which will
report the total amount of memory installed less the amount of pre-allocated memory.
Systems running Windows Vista or Windows 7 use Protected Audio Video Path (PAVP) to
ensure smooth playback of high-definition video by off-loading video decoding from the
processor to the integrated graphics controller. BIOS can allocate addtional memory for PAVP,
which can be set through RBSU to run in Lite mode (default) or in Heavy mode. Table 6-2 shows
the PAVP memory usage for Windows Vista and Windows 7.
NOTES:
Dedicated Video Memory (memory owned and locked for graphics use and reported by the OS):
PAVP Lite setting = 32 MB
PAVP Heavy setting = 122 MB
System Video Memory (memory locked and dedicated for gtraphics use):
PAVP Lite setting = 96 MB
PAVP Heavy setting = 6 MB
[1] Total amount of memory available for graphics as reported by the OS.
[2] Shared System Memory (memory dynamically allocated for graphics use).
Table 6-1.
Integrated Graphics Controller
Memory Allocation with Windows XP
System Memory Installed Pre-allocated DVMT
0.5 GB 32 MB 128 MB
1.0 G B 32 M B 512 M B
1.5 GB 32 MB 768 MB
> 2GB 32 MB 1024 MB
Table 6-2.
Integrated Graphics Controller
Memory Allocation with Windows Vista or Windows 7
System Memory
Installed
PAVP
Setting
Available
System
Memory
Total
Available
Graphics Memory [1]
Shared
System
Memory [2]
1 GB Lite 952 MB 252 MB 124 MB
Heavy 856 MB 294 MB 166 MB
2 GB Lite 1976 MB 764 MB 636 MB
Heavy 1880 MB 806 MB 678 MB
4 GB Lite 4024 MB 1759 MB 1631 MB
Heavy 3928 MB 1759 MB 1631 MB
6 GB Lite 6072 MB 1759 MB 1631 MB
Heavy 5976 MB 1759 MB 1631 MB
8 G B L i t e 812 0 M B 1759 MB 1631 M B
Heavy 8024 MB 1759 MB 1631 MB