Intel D865GRH D865GRH_SpecUpdate07. - Page 18

Intel® Desktop Board D865GRH Specification Update 8. System Memory May Be Reduced in Excess of the Amount of AGP Aperture Size When 4GB of System Memory are Used PROBLEM: The AGP aperture size setting in the system BIOS will consume, from available system memory, 2 times the amount applied in the AGP aperture setting when the maximum of 4 GB of system memory is installed. IMPLICATION: When 4GB of system memory are used, and system memory is allocated to AGP aperture size in BIOS Setup, available system memory may be reduced by twice the amount allocated. A similar impact to available system memory may occur from any allocation of system memory when 4 GB of system memory is used. For example, increasing the video frame buffer in BIOS may also reduce available memory in excess of the amount requested. WORKAROUND: None. STATUS: This erratum may be fixed in a future BIOS revision. 9. System May Intermittently Hang at POST Code 75 with SATA Hard Disk Drives Attached PROBLEM: An intermittent hang at POST code 75 may be observed when SATA Hard Disk Drives are used. This intermittent hang is due to an erroneous circuit race condition in the system clock when spread spectrum is enabled by BIOS. IMPLICATION: The system hang is exhibited when the system clock's internal circuitry is erroneously enabled when spread spectrum is enabled on PLL1. By setting the SMBUS register byte 0, bit 7, to 1 before spread spectrum is enabled and also enabling spread spectrum earlier in the boot process (prior to enabling the SATA ports), this hang condition is avoided. WORKAROUND: The user will need to reset the system. STATUS: This issue may be fixed in a future BIOS revision, which allows the SATA Hard Disk Drives to be reinitialized.. 12