Acer Power F1 Power F1/ Aspire T310 Service Guide - Page 39

The following table describes each parameter under the sub-menu. Settings in boldface are the default and suggested values. Parameter Current CPU Frequency / Current DRAM Frequency Performance Mode DRAM Timing Control DRAM CAS Latency RAS Active Time(tRAS) RAS Precharge Time(tRP) RAS to CAS Delay(tRCD) Description Shows the CPU and DRAM frequency. Options Enables this item to enhance the system performance. Enabled Disabled Enables you to select the CAS latency time in HCLKs of 2, 2.5, or 3. The value is set at the factory depending on the DRAM installed. Do not change the values in this field unless you change specifications of the installed DRAM or the installed CPU. By SPD Manual This item controls the timing delay (in clock 2T, 2.5T, 3T cycles) before the DRAM starts a read command after receiving it. This item allows you to set the amount of time a RAS can be kept open for multiple accesses. High figures will improve performance. 4T, 5T, 6T, 7T, 8T, 9T This is the duration of the time interval during which the Row Address Strobe signal to a DRAM is held low during normal Read and Write Cycles. This is the minimum interval between completing one read or write and starting another from the same (non-page mode) DRAM. Techniques such as memory interleaving, or use of Page Mode DRAM are often used to avoid this delay. Some chipsets require this parameter in order to set up the memory configuration properly. The RAS Precharge value is typically about the same as the RAM Access (data read/write) time. 2T, 3T, 4T, 5T This is the amount of time a CAS is performed after a RAS. The lower the better, but some DRAM does not support low figures. 2T, 3T, 4T, 5T The other two parameters under the Advanced Chipset Features are presented below. Settings in boldface are the deafult and suggested values. AGP & P2P Bridge Control Press [Enter] to enter the sub-menu and the following screen appears: Parameter AGP Aperture Size Graphic Window WR Combin AGP Fast Write Support AGP Data Rate Description Options This setting controls just how much system RAM can be allocated to AGP for video purposes. The aperture is a portion of the PCI memory address range dedicated to graphics memory address space. Host cycles that hit the aperture range are forwarded to the AGP without any translation. 32MB, 64MB, 128MB, 256MB, 512MB This item determines whether the graphic windows base address is valid or not. Enabled Disabled Enables and disables AGP Fast Write Support. Disabled Enabled This item allows you to control AGP card data transfer rate. Auto, 1x, 2x, 4x ,8x 26 Chapter 2