whats an AGP aperture size?

whats an AGP aperture size?

Field Value
North Bridge Properties
North Bridge Intel Brookdale i845PE
Revision 01
Package Type 760 Pin FC-BGA
Package Size 3.75 cm x 3.75 cm
Core Voltage 1.5 V
In-Order Queue Depth 12

Memory Timings
CAS Latency (CL) 2T
RAS To CAS Delay (tRCD) 3T
RAS Precharge (tRP) 3T
RAS Active Time (tRAS) 6T

Error Correction
ECC Not Supported
ChipKill ECC Not Supported
ECC Scrubbing Not Supported

Memory Slots
DRAM Slot #1 256 MB (PC2700 DDR SDRAM)

AGP Controller
AGP Version 2.00
AGP Status Enabled
AGP Device nVIDIA GeForce4 MX 420
AGP aperture Size 128 MB
Supported AGP Speeds 1x, 2x, 4x
Current AGP Speed 4x
Fast-Write Supported, Enabled
Side Band Addressing Supported, Disabled

Chipset Manufacturer
Company Name Intel Corporation
Product Information http://www.intel.com/products/browse/chipsets.htm
Driver Download http://support.intel.com/support/chipsets/index.htm

Problems & Suggestions
Problem AGP aperture size is more than half of the system memory size. This may cause performance penalty.

 

Here is a site that tells you exactly (or close to it) what the aperture size is.....

http://www.ocfaq.com/article.php/overclocking/vidcard/43

 

Its a portion of system memory dedicated to the video card,lower it to 64 if you have performance issues.

 

BFG tech support has told me It should always be half your vid card memory.