User manual TYAN THUNDER K8HR

[. . . ] Thunder K8HR /// Version 1. 0 S3891 Copyright Copyright © TYAN Computer Corporation, 2005. No part of this manual may be reproduced or translated without prior written consent from TYAN Computer Corp. Trademark All registered and unregistered trademarks and company names contained in this manual are property of their respective owners including, but not limited to the following. TYAN, Thunder K8HR are trademarks of TYAN Computer Corporation. AMD, Opteron, and combinations thereof are trademarks of AMD Corporation. [. . . ] Additional configuration for the AMD8131 PCI-X Tunnel is available in the PCI-X Configuration Menu. Select a menu by highlighting it using the Arrow ( / ) keys and pressing Enter. The settings are described on the following pages. Main Advanced BIOS Setup Utility PCI/PnP Boot Security Chipset Exit NorthBridge Configuration HT2000 SystemI/O Configuration HT1000 South Bridge Configuration Options for NB. Select Screen Select Item +/- Change Option Enter Go to Sub Screen F1 General Help F10 Save and Exit ESC Exit 69 http://www. TYAN. com 3. 9. 1 ­ North Bridge Chipset Configuration Sub-Menu This menu gives options for customizing memory & Hypertransport settings. Select a menu by highlighting it using the Arrow ( / ) keys and pressing Enter. The settings are described on the following pages. Main Advanced BIOS Setup Utility PCI/PnP Boot Security Chipset Exit NorthBridge Chipset Configuration Memory Configuration ECC Configuration IOMMU Option Configuration Memory CLK :XXX MHz CAS latency (Tcl) :XX RAS/CAS Delay (Trcd) :X CLK Min Active RAS (Tras) :X CLK Row Precharge Time (Trp) :X CLK RAS/RAS Delay (Trrd) :X CLK Row Cycle (Trc) :X CLK Row Refresh Cycle (Trfc) :X CLK Read Write Delay (Trwt) :X CLK Read Preamble :X ns Asynchronous Latency :X ns Select Screen Select Item Enter Go to Sub Screen F1 General Help F10 Save and Exit ESC Exit Feature Option NorthBridge Chipset Configuration Memory CLK Read only Description It shows the clock frequency of the installed SDRAM. This controls the timing delay (in clock cycles) before SDRAM starts a read command after receiving it. When DRAM is refreshed, both rows and columns are addressed separately. This setup item allows you to determine the timing of the transition from RAS (row address strobe) to CAS (column address strobe). The less the clock cycles, the faster the DRAM performance. CAS Latency (Tcl) Read only RAS/CAS Delay (Trcd) Read only 70 http://www. TYAN. com Feature Option NorthBridge Chipset Configuration Description This setting allows you to select the number of clock cycles allotted for the RAS pulse width, according to DRAM specifications. The less the clock cycles, the faster the DRAM performance. This item controls the number of cycles for Row Address Strobe (RAS) to be allowed to precharge. If insufficient time is allowed for the RAS to accumulate its chage before DRAM refresh, refresh may be incomplete and DRAM may fail to retain data. This item applies only when synchronous DRAM is installed in the system. Other values add to or subtract from hardware generated value. RAS#-active to RAS#-active or auto refresh of the same bank. Auto-refresh-active to RAS#-active or RAS# auto-refresh. This is not a DRAM-specified timing parameter, but must be considered due to routing latencies on the clock forwarded bus. It is counted from the first address bus slot that was not associated with part of the read burst. The time prior to the maxread DQS-return when the DQS receiver should be turned on. The controller needs to know when to enable its DQS receiver in anticipation of the DRAM DQS driver turning on for a read. The controller will disable its DQS receiver until the read preamble time and then enable its DQS receiver while the DRAM asserts DQS. [. . . ] Besides designing innovative and quality products for over a decade, Tyan has continuously offered customers service beyond their expectations. Tyan's website (www. tyan. com) provides easy-to-access resources such as indepth Linux Online Support sections with downloadable Linux drivers and comprehensive compatibility reports for chassis, memory and much more. With all these convenient resources just a few keystrokes away, users can easily find the latest softare and operating system components to keep their systems running as powerful and productive as possible. Tyan also ranks high for its commitment to fast and friendly customer support through email. [. . . ]