Numbers confuse me
Got a couple of questions. I just want to up the speed on this ddr ram, it is 3200 and posting at 2700. I am not out to overclock the cpu. Do I need to change the cpu clock in the bios to do this? Is so what do I need to change it to.
Next Question- Do I have to up the voltage onthe the VCore default voltage? If so to what
Do i need to up the Voltage on the Dimm Default voltage also? Again if so what do I set it to.
This is all the stuff I do not understand, all these numbers and stuff. Running a athlon xp 1900. If I do have to up the voltage on the VCore stuff just not sure what to set it to. Did not know if I could just fiddle with the ram and not the CPU. DDR ram has lifetime warrenty, CPU doesn't
That's an interesting question. I noticed the newer mobo's have the memory on a separate speed than the FSB. I would imagine that the memory speed is adjustable.
PC2100 is running @133MHz FSB.
PC2700 is running @166MHz FSB.
PC3200 is running @200MHz FSB.
If you have mobo which supports asyncronious settings for CPU and RAM, then you must change it to appropriate value (as far as I know, SiS645 support 133/166 setting). If your mobo is using syncronized settings for CPU and FSB, then you have no other choice then to o/c FSB to 166MHz to take advantage of PC2700 memory. Don't know if your mobo/CPU can handle this. Increasing VCore by 0.1v-0.15v should be safe, as well as increasing DIMM voltage up to 3.4v.
Thanks and another question
I am posting the PC 2700 ram. OCZ makes PC 3000 and PC 3200. I have the 3200 ram. Advertise it at 400mhz. The guy at epox told me the board would run the PC 3200 no problem. THe guy meaning someone in tech support. This is a Epox 8k3a+. I just don't know what to set the settings to in the bios to achieve this.OCZ reports on thier website they had PC 3200 up to 210mhz on this motherboard and it was 100% stable. I called OCZ and he told me I could bump the voltage up to 2.70, runs 2.50 by default. I just do not know what other settings I need to change. THere is something in the bios for the CPU voltage also but just says default and I do not know what to up it to or if I need to up it. Feel like I could mess up there very easily. running a athlon xp 1900 processor. Really don't want to push the processor much, or not so much as getting close to burning it out.
No one at epox or OCZ wants to tell me the settings though. I guess I can understand that as I know people would point the finger at them if something happened. I sure would like to know what settings I would need to put in the bios though to at least run it for PC 3000 Ram.
"PC3200" runs at 200MHz DDR (400MHz effective.) So when OCZ runs it at 210MHz they're running it at 420MHz effective.
Most Via Chipsets do let you run the Memory Bus asynchronously from the FSB, remember we're dealing with base not DDR ratings here, but they usually limit out to Host Clock +PCI Bus. In order to get "PC3200" to run at its full speed you'd need to have a motherboard that can run the Athlon's FSB at 166MHz (333MHz DDR) and run the memory at Host Clock + PCI Bus with the FSB that high.
Good luck, and I wouldn't do it unless you know and understand exactly what you're doing, and have an unlocked CPU.
I use quotation marks around "PC3200" because there is no official JEDEC standard for PC3200 DDR RAM.
"Dude you're getting a Dell." Obscure curse from the early 21st Century, ascribed to a minor demon-spirit known as "Stephen?" [sp].
There is no way to run the RAM at 200 (400) Mhz on the KT333 without overclocking the CPU's FSB.
The only chipset that can do this is the SiS745.
What the techie told you is true, the RAM will run fine, just not at full speed.
Thanks guys for the help
Thanks for the info, think I will leave it alone. Probably not worth the added performance I would get anyway. Haven't found anything the system won't run anyway.
the only way to make use of your PC3200 is to overclock your cpu's front side bus to 200MHz .....good luck but since you dont want to over clock your cpu , here is a site that will show u what to set ur bios at to make sure that your memory is running at top speed w/ out over clocking your cpu .
http://www.ocworkbench.com/2002/epox...a+gallery3.htm as far as uping the voltage to your memory dont worry about it . that is only for over clocking to make your system stable when your memory is holding you back .
Last edited by [ja] LoCo; 05-09-2002 at 07:32 AM.
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