OC Ram is still way over my head

[Finns14]

So I was reading the AT article with a DFI board 3200+ venice and value all of which I have and I'm still confused about memory settings with OCing. I went to the dfi-street forums and they are just as confusing. I understand the basics of OCing the CPU(to a small extent) but I'm still pretty baffled by RAM OCing. I don't expect much out of value Ram but I know I can get a little more out of it. Any advice from anyone?

 

[mwmorph]

dont oc it use a divider. say you are running your cpu at 250fsb(2.5ghz cpu stock 10x multiplier i think). then you can use your memory divider ot run at 166mhz(about 5:4). taht means for every 100 million cycles your cpu runs, you'll have the ram run 83 million cycles. that means that the ram will run at 207.5mhz while the front side bus runs at 250mhz and the cpu runs at 250x10 which is 2500mhz.

 

[python023]

Here are the basics. Your motherboard operates at an FSB, which, at stock settings, is 200Mhz. Your CPUs speed is calculated by that FSB (200Mhz) times a multiplier of 10, so its stock speed is 2000Mhz, or 2.0ghz. Your RAM runs at a divider, (default of 1:1 ratio) with the FSB, so at stock speeds it runs at 200Mhz also. As you raise your FSB by 1Mhz, your CPU will go up 1Mhz * 10 (multiplier), and your RAM's speed will equal your FSB at 201Mhz. Value RAM will only get so far...so once you reach around anywhere from 210-230 (ymmv) your memory will start to err and fail. So lets say it fails at 215Mhz FSB. Your CPU will be running at 2.15ghz, your RAM at 215Mhz, your FSB at 215Mhz. This is where you want to apply a divider (setting in BIOS). If you change the divider from 1:1, to 5:4 (FSB:RAM), your FSB will still be 215Mhz, but your RAM will be lowered to 172Mhz, an easily stable speed. You know have quite a lot of head room to raise your FSB to Max out your CPU, and just keep applying a divider to your RAM that will keep it under its max stable speed of 215Mhz.

Comprendez?

 

[Finns14]

Originally posted by: python023
Here are the basics. Your motherboard operates at an FSB, which, at stock settings, is 200Mhz. Your CPUs speed is calculated by that FSB (200Mhz) times a multiplier of 10, so its stock speed is 2000Mhz, or 2.0ghz. Your RAM runs at a divider, (default of 1:1 ratio) with the FSB, so at stock speeds it runs at 200Mhz also. As you raise your FSB by 1Mhz, your CPU will go up 1Mhz * 10 (multiplier), and your RAM's speed will equal your FSB at 201Mhz. Value RAM will only get so far...so once you reach around anywhere from 210-230 (ymmv) your memory will start to err and fail. So lets say it fails at 215Mhz FSB. Your CPU will be running at 2.15ghz, your RAM at 215Mhz, your FSB at 215Mhz. This is where you want to apply a divider (setting in BIOS). If you change the divider from 1:1, to 5:4 (FSB:RAM), your FSB will still be 215Mhz, but your RAM will be lowered to 172Mhz, an easily stable speed. You know have quite a lot of head room to raise your FSB to Max out your CPU, and just keep applying a divider to your RAM that will keep it under its max stable speed of 215Mhz.

Comprendez?

Well AMD don't use FSB their mem controllers are built into the chips

 

[Finns14]

Everything else was very helpful

 

[mwmorph]

Originally posted by: Finns14

Originally posted by: python023
Here are the basics. Your motherboard operates at an FSB, which, at stock settings, is 200Mhz. Your CPUs speed is calculated by that FSB (200Mhz) times a multiplier of 10, so its stock speed is 2000Mhz, or 2.0ghz. Your RAM runs at a divider, (default of 1:1 ratio) with the FSB, so at stock speeds it runs at 200Mhz also. As you raise your FSB by 1Mhz, your CPU will go up 1Mhz * 10 (multiplier), and your RAM's speed will equal your FSB at 201Mhz. Value RAM will only get so far...so once you reach around anywhere from 210-230 (ymmv) your memory will start to err and fail. So lets say it fails at 215Mhz FSB. Your CPU will be running at 2.15ghz, your RAM at 215Mhz, your FSB at 215Mhz. This is where you want to apply a divider (setting in BIOS). If you change the divider from 1:1, to 5:4 (FSB:RAM), your FSB will still be 215Mhz, but your RAM will be lowered to 172Mhz, an easily stable speed. You know have quite a lot of head room to raise your FSB to Max out your CPU, and just keep applying a divider to your RAM that will keep it under its max stable speed of 215Mhz.

Comprendez?

Well AMD don't use FSB their mem controllers are built into the chips

Yeah amds do use fsb. just because the controller si on chip does not mean fsb isnot used. in your bios, it should have an option for fsb(maybe it might be named HTT also, but it's the same thing)

 

[NuroMancer]

Originally posted by: Finns14

Originally posted by: python023
Here are the basics. Your motherboard operates at an FSB, which, at stock settings, is 200Mhz. Your CPUs speed is calculated by that FSB (200Mhz) times a multiplier of 10, so its stock speed is 2000Mhz, or 2.0ghz. Your RAM runs at a divider, (default of 1:1 ratio) with the FSB, so at stock speeds it runs at 200Mhz also. As you raise your FSB by 1Mhz, your CPU will go up 1Mhz * 10 (multiplier), and your RAM's speed will equal your FSB at 201Mhz. Value RAM will only get so far...so once you reach around anywhere from 210-230 (ymmv) your memory will start to err and fail. So lets say it fails at 215Mhz FSB. Your CPU will be running at 2.15ghz, your RAM at 215Mhz, your FSB at 215Mhz. This is where you want to apply a divider (setting in BIOS). If you change the divider from 1:1, to 5:4 (FSB:RAM), your FSB will still be 215Mhz, but your RAM will be lowered to 172Mhz, an easily stable speed. You know have quite a lot of head room to raise your FSB to Max out your CPU, and just keep applying a divider to your RAM that will keep it under its max stable speed of 215Mhz.

Comprendez?

Well AMD don't use FSB their mem controllers are built into the chips

Actually, They do. Your AMD board still has a FSB in the bios, and it still has memory dividers in the bios.

 

[Finns14]

Originally posted by: NuroMancer

Originally posted by: Finns14

Originally posted by: python023
Here are the basics. Your motherboard operates at an FSB, which, at stock settings, is 200Mhz. Your CPUs speed is calculated by that FSB (200Mhz) times a multiplier of 10, so its stock speed is 2000Mhz, or 2.0ghz. Your RAM runs at a divider, (default of 1:1 ratio) with the FSB, so at stock speeds it runs at 200Mhz also. As you raise your FSB by 1Mhz, your CPU will go up 1Mhz * 10 (multiplier), and your RAM's speed will equal your FSB at 201Mhz. Value RAM will only get so far...so once you reach around anywhere from 210-230 (ymmv) your memory will start to err and fail. So lets say it fails at 215Mhz FSB. Your CPU will be running at 2.15ghz, your RAM at 215Mhz, your FSB at 215Mhz. This is where you want to apply a divider (setting in BIOS). If you change the divider from 1:1, to 5:4 (FSB:RAM), your FSB will still be 215Mhz, but your RAM will be lowered to 172Mhz, an easily stable speed. You know have quite a lot of head room to raise your FSB to Max out your CPU, and just keep applying a divider to your RAM that will keep it under its max stable speed of 215Mhz.

Comprendez?

Well AMD don't use FSB their mem controllers are built into the chips

Actually, They do. Your AMD board still has a FSB in the bios, and it still has memory dividers in the bios.

Dividers I know it has but there is no option in my BIOS for FSB

 

[Finns14]

If I crank up my FSB to high with out a divider whats the worst that is going to happen a crash?

 

[TheRyuu]

Is it really the FSB on the AMD? Would it just be "bus speed"? or HHT Speed?

FSB is old term, they should make a new one since AMD's don't use a FSB, they you hypertransport link.

 

[GuitarDaddy]

Originally posted by: Finns14
If I crank up my FSB to high with out a divider whats the worst that is going to happen a crash?

90% of the time the worst case is corrupting your windows install, which requires a repair install or a fresh install

The absolute worst case is corrupting the boot sector of the hard drive which requires reformatting the hard drive (losing all your data), and doing a fresh install.

Ram related crashes are the nastiest O/C crashes, just save yourself the trouble and run a divider. O/C ram provides almost no performance improvement on A64's anyway.

 

[GuitarDaddy]

[And the FSB on A64's is called HTT