Do not know where to set the memory divider (mem timing) to overclock A64 3000 939 Winchester to 2.4 GHz. I can not find mem setting menu. Should update the BIOS? Please help.My Motherboard Abit AV8, memory Corsair value DDR400 2x512 MB.
Overclocking - Need Help
- Thread starter nharose
- Start date
Do not know where to set the memory divider (mem timing) to overclock A64 3000 939 Winchester to 2.4 GHz. I can not find mem setting menu. Should update the BIOS? Please help.My Motherboard Abit AV8, memory Corsair value DDR400 2x512 MB.
I went through the manual can not get it. Near CPU setting are only multiplier setting and CPU/AGP/PCI ratio setting. Nothing for memory setting. Another menu in bios is RAM setting but I did not see ?memory divider setting?.
I know it is very simple for other people, but I still can not understand how to do it in Abit AV8 motherboard and µGuru Bios menu.
I want to OC as follow:
CPU Winchester 3000, other people was able to OC up to 2650MHz, I will only put it at 2400MHz at default 9x multiplier, which will need 266 HTT to get there.
RAM Corsair Value Select 2x512MB PC3200 400MHz, I expect will be able to run at 205MHz
Obviously it is not possible to run the RAM at 1:1 which would be 266MHz, and must use memory divider/ memory setting at 1:0.75
I know all those from somebody mentioned in this forum, but again, how to change the memory setting to 1:0.75?
Appreciate to any help.
I know it is very simple for other people, but I still can not understand how to do it in Abit AV8 motherboard and µGuru Bios menu.
I want to OC as follow:
CPU Winchester 3000, other people was able to OC up to 2650MHz, I will only put it at 2400MHz at default 9x multiplier, which will need 266 HTT to get there.
RAM Corsair Value Select 2x512MB PC3200 400MHz, I expect will be able to run at 205MHz
Obviously it is not possible to run the RAM at 1:1 which would be 266MHz, and must use memory divider/ memory setting at 1:0.75
I know all those from somebody mentioned in this forum, but again, how to change the memory setting to 1:0.75?
Appreciate to any help.
The BIOS isn't always as clear as that.
You should be able to manually set your memory to 200/166/133/100 MHz, which is for PC3200/PC2700/PC2100/PC1600, respectively. However, when you raise the system bus, these frequencies don't always hold.
To get your Venice to 2.4 GHz, you'll have your system bus running at 267 MHz. If you keep your memory setting at "200 MHz," its actual speed will be 267 MHz (which will toast your DIMMs). If you set it at "166 MHz," its actual speed will be 222 MHz (which may or may not be stable). To help with stability, try easing up your timings. If you can't get it stable at 222 MHz, go ahead and set it to "133 MHz," which will yield a real speed of 178 MHz. You're memory may be slower, but the performance gain from your high CPU clock will more than make up for it. Plus, at 178 MHz, you can probably tighten up your timings and still run stable.
You should be able to manually set your memory to 200/166/133/100 MHz, which is for PC3200/PC2700/PC2100/PC1600, respectively. However, when you raise the system bus, these frequencies don't always hold.
To get your Venice to 2.4 GHz, you'll have your system bus running at 267 MHz. If you keep your memory setting at "200 MHz," its actual speed will be 267 MHz (which will toast your DIMMs). If you set it at "166 MHz," its actual speed will be 222 MHz (which may or may not be stable). To help with stability, try easing up your timings. If you can't get it stable at 222 MHz, go ahead and set it to "133 MHz," which will yield a real speed of 178 MHz. You're memory may be slower, but the performance gain from your high CPU clock will more than make up for it. Plus, at 178 MHz, you can probably tighten up your timings and still run stable.
Okay. Not sure where the settings are in the Asus bios, but it should be under the menu "CPU Frequency Change" or something like that. You'll want to set a 166 RAM Speed and change the HTT (or FSB, whatever its called in your BIOS) to 266. Also, you'll need to lower your HTT multiplier to 3x to make sure its stable. Might have to up vcore a tenth or so, depending...
EDIT: Alternately, you could set a 133 RAM divider and run 8x300, that'd get you 2400 MHz, and your RAM would be at 200MHz.
Oh, right... I'm used to my non-CNQ Sempron. Yes, go with 8x300. Actually, though, if you raise the voltage a bit, you should be able to do 9x300 just fine.
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