Thanks to Mackey D for spotting this Guide posted over at AMDMB's Forum by Caprid! Here's snip.
If your choice of a board will be made mainly for overclocking in mind. You should pick one that has those options available, to make it easier. You'll want to find one that has some sort of an AGP/PCI lock or working divider. Since the motherboad manufactures won't come flat out and tell you wants going on you'll have find out yourselves. Good thread on that Here (once you skip over the Oclocking posts) Irregardless of how it works, the fact is that some boards will do well over 300FSB and some won't. Secondly you'd want to chose a board that will allow you to change the multipliers. The A64s will not go over their default multi, but will go lower if the boards BIOS has that option available.(Cool&Quite) This will help you max out your CPU.
It would help if you had a basic understanding of how to overclock(google is your friend) This is mainly for the A64s because they are so different from the XPs. The main difference is that the memory controller is intergraded inside the CPU and not by the North Bridge. Also the AGP tunnel or HTT link doesn't go through the North bride either, this cuts down on latency for both, and is were the performance gains come from over the XPs clock for clock. There is no "FSB" for the A64s, it's just a clock generator for the CPU. I try to think of it as a more complex multiplier adjustment, as it's disconnected from the bus entirely. One other big difference is, that the A64s do not seem to take any performance hit running aysnc like the XPs do. Your RAM running at 230Mhz it's running at 230Mhz irregardless of if it's 1:1 6:5 or any other memory divider, that goes back to the "FSB" setting being more of a complex multiplier. And lastly, is the HTT speed. You'll have to lower it to get the most out of your system. Once again, there seems to be no performance hit by slowing it down. I've done alot of testing and found that only "synthetic" benchmarks benefit from the higher HTT speed, I think in part because they only test the theoretical performance and not actual performance. In real life apps and games, can't take advantage of the full bandwidth of AGP tunnel, so lowering it has little or no effect. Unless you want to see a big 3Dmark score. Other than the games, I also ran SPECView 7.1.1 to see if it effects Open GL graphics rendering.
How do you Overclock a A64?
If your choice of a board will be made mainly for overclocking in mind. You should pick one that has those options available, to make it easier. You'll want to find one that has some sort of an AGP/PCI lock or working divider. Since the motherboad manufactures won't come flat out and tell you wants going on you'll have find out yourselves. Good thread on that Here (once you skip over the Oclocking posts) Irregardless of how it works, the fact is that some boards will do well over 300FSB and some won't. Secondly you'd want to chose a board that will allow you to change the multipliers. The A64s will not go over their default multi, but will go lower if the boards BIOS has that option available.(Cool&Quite) This will help you max out your CPU.
It would help if you had a basic understanding of how to overclock(google is your friend) This is mainly for the A64s because they are so different from the XPs. The main difference is that the memory controller is intergraded inside the CPU and not by the North Bridge. Also the AGP tunnel or HTT link doesn't go through the North bride either, this cuts down on latency for both, and is were the performance gains come from over the XPs clock for clock. There is no "FSB" for the A64s, it's just a clock generator for the CPU. I try to think of it as a more complex multiplier adjustment, as it's disconnected from the bus entirely. One other big difference is, that the A64s do not seem to take any performance hit running aysnc like the XPs do. Your RAM running at 230Mhz it's running at 230Mhz irregardless of if it's 1:1 6:5 or any other memory divider, that goes back to the "FSB" setting being more of a complex multiplier. And lastly, is the HTT speed. You'll have to lower it to get the most out of your system. Once again, there seems to be no performance hit by slowing it down. I've done alot of testing and found that only "synthetic" benchmarks benefit from the higher HTT speed, I think in part because they only test the theoretical performance and not actual performance. In real life apps and games, can't take advantage of the full bandwidth of AGP tunnel, so lowering it has little or no effect. Unless you want to see a big 3Dmark score. Other than the games, I also ran SPECView 7.1.1 to see if it effects Open GL graphics rendering.
How do you Overclock a A64?
