My effort to explain what the setting in your BIOS do.\nExamples in "Olive" are based on my current rig.\nProcessor: 2400+ (unlocked) w/SP-97\nMotherboard: NF7-S Rev.2\nRAM: Generic Samsung 2x512 Pc3200(400MHz)\nVideo Card: Radeon 9800Pro\n//CPU MENU//\nCPU Operating SpeedUser Defined\nThis option lets you select the actual operating speed "2400+" or "user defined" which allows you to change External Clock and Multiplier Factor.\nExternal Clock205\nThis setting controls the clock speed of the memory bus on the motherboard. The internal processor speed is the product of the "External Clock" x "Multiplier Factor" = 2537MHz\nMultiplier Factor11.5\nThis setting controls the multiplier that is used to determine the "Actual clock speed" of the processor relative to the external or motherboard clock speed. "External Clock" x "Multiplier Factor" = 2537MHz\nCPU FSB/DRAM ratio3/3\nHow your RAM interacts with your "External clock"\nExternal Clock = 200MHz\nDivider 3/3\nRAM = 200MHz(400MHz Effective)\nExternal Clock = 133MHz\nDivider 4/6\nRAM = 200MHz(400MHz Effective)\nCPU Interfaceenabled\nThis setting just increases the FSB speed, however it's pointless as you should already have the option to set the FSB to whatever you want. (Googled not sure if true)\n//VOLTAGE MENU//\nCPU Core voltage or Vcore2.03\nThis setting controls the amount of voltage going into your cpu. Note that you shouldn't raise this too high unless your cooling is up to the task as it CAN damage your CPU.\nDDR SDRAM Voltage2.9\nThis setting controls the amount of voltage going into your RAM.\nChipset Voltage1.7\nThis allows you to change the "chipset voltage" or the "northbridge" (nForce 2 Ultra 400) this usually allows you to get higher overclocks.\nAGP Voltage1.5\nThis is the voltage going into your video card, raising this will do nothing to help you obtain higher overclocks. And may damage your card. Unless otherwise posted, keep this at 1.5 as the extra power is drawn from the "external molex connector" (9800Pro).\n//AGP Menu//\nInit Display FirstAGP\nThis BIOS feature allows you to select whether to boot the system using the AGP graphics card or the PCI graphics card.\nAGP Aperature Size128MB\nThis is when you run out of Video RAM, it then allocates RAM from the windows 4 GB memory address space. As far as I know this is pointless with AGP cards but is usefull with integreted graphics cards.(may be rong in this)\nAGP Frequency66MHz\nThis should be kept at 66MHz to keep from frying your video card. But even very small changes cause severe system errors, destabilization etc.\nAGP Data Transfer Rate8x\nThe Accelerated Graphics Port operates at a clock speed of 66 MHz, but allows for a variety of high transfer rates, depending on the specific mode of operation. AGP currently allows for transfer rates of 1x, 2x, 3x, 4x, or 8x. Any newer AGP card should be set 8x if the BIOS doesnt automatically do it. Older cards will operate at a 4x interface.\nAGP Fast Write Capabilityenabled\nFast Write allows the AGP device act like a PCI device. This allows it to bypass the main memory and directly access the data which improves AGP read performance. However AGP write performance is not affected. You should turn this on.\n//BIOS MENU//\nSystem BIOS Cacheabledisabled\nOn most systems, you can shadow your system BIOS ROM. Caching of the motherboard BIOS ROM from F0000h to FFFFFh by the processor's Level 2 cache. This greatly speeds up accesses to the BIOS. This\nis a waste of the Level 2 cache's bandwidth. I recomend to disabled it.\nVideo RAM Cacheabledisabled\nThis like the "System BIOS Cacheable" will use the processor's L2 cache. With the VIdeo RAM to cache that small 64KB region of the video RAM. The performance of the graphics card will most probably receive a boost from the lower latency and higher bandwidth of the processor's L2 cache. Again this is a waste of the Level 2 cache's bandwidth. I recomend to disabled it.\nFSB/AGP Spread Spectrumdisabled\nThis option is to eneable modulating of the signal it generates so that the spikes are reduced to flatter curves. Usually offers two levels of modulation - 0.5% or 1.0%. System stability may be compromised and I recommend that you disable this feature.\nQuick Power on Seld Test/ Quick Boot\nEnabling this setting will cause the BIOS power-on self test routine to skip some of its tests during bootup. One of the key things this setting usually does when enabled is cause the POST to skip checking all of extended memory for errors.\nBoot up Floppy Seekdisabled\nThis BIOS feature determines whether the BIOS checks for a floppy drive during boot-up or not.\nSecurity OptionSetup\nThe ability to have the BIOS password protected.\n//HARDWARE MONITOR//\nCPU Thermal throttlingdisabled\nCPU Throttling occurs when the CPU becomes 'too hot'. The CPU throttles down the load to decrease it's core temperature. The default setting is usually 62.5%or 50.0%.I turn this off as I know my cooling is fine.\nCPU Disconnect Functiondisabled\nA far as I know this drops the CPU temperature during idle time and possibly lowers the energy used but I don't recommend it because it may make the system unstable when overclocked. If you have good cooling don't use it\n//MEMORY//\nMemory Timing Settings\nThe memory's real speed is determined by the timing that the system is told to use, often via settings in the BIOS setup program. These settings control how quickly the system will try to read or write to the memory.\nCAS (Column Access Strobe)\nA signal which tells the DRAM to accept an address as the column address. Used in conjunction with Row Access Strobe (see RAS) to select a bit of DRAM.\nCAS Latency\nCAS latency refers to the ratio between column access time and clock cycle time. Since column access time refers to the period after the CPU requests a column, to when the data is moved to the output line, a lower CAS latency means less clock cycles to move the data to the output line. It is usually recommended you use the lowest CAS latency which your RAM and motherboard can run stable with.\nTras (Active to Precharge)\nTras specifies the amount of time required between an active command to a precharge command. Basically this means the number of cycles that must pass after a bank is opened to when it can be closed. It is usually recommended you use the lowest Tras which your RAM and motherboard can run stable with.\nRAS# to CAS#\nThis is the delay in memory cycles between the time a row is activated and when a column of data within the row can actually be requested.\nRAS Precharge\nThis is the time in memory cycles that is required to flush an active row out before a new row can be requested. This only comes into play when a request is made to an inactive row.\nAnyhoo, hope this helps.