Concillian,Feb 4 2005, 11:50 AM Wrote:No, PC3200 and PC2700 (DDR400 and DDR333 respectively) is fully backwards compatible with PC2100 (DDR266) All you have to do is buy 512 MB of PC3200 and you're set for now and you have 512 MB for an upgrade. It will work fine with your existing PC2100.
Any PC2100 sold now is just de-rated PC2700 anyway. In fact, I have 2 sticks of PC2700 that were apparently de-rated PC3200 and run fine at 200 MHz.
Also, your FSB is 133 MHz, CPU speed is 133 x 15 = 2000 MHz
Everything is DDR, so "effective speed" is always what is quoted, even though the actual speed is half that.
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A 2 GHz Pentium 4 always has 133 MHz FSB/Host speed? One moment .. are you saying that my system is currently running under value?
This are my current BIOS settings (regarding speeds), which my dealer has set when I bought a new mainboard (Gigabyte GA-8PE800(-L), supports PC266/333 RAM) for my Pentium 4 2 GHz last year:
CPU Host Clock Control: Disabled (can be enabled to allow OC and proper adjustment using the following Host Frequency parameter)
CPU Host Frequency: 100 MHz (set by the dealer - Should I set this to 133 now for the 2 GHz P4? Are you sure that this would be no overclocking, and that the formula "CPU speed = FSB speed x 15" is always right?)
Host/DRAM Clock Ratio: 2.66 (set by the dealer - This must be set to 2.0 for PC266 RAM and 2.66 for PC333 RAM if I set CPU Host Frquency to 133 Mhz, correct?)
EDIT:
If you look at this original Intel data sheet for the P4 2 GHz, then it has just 100 MHz Host Frequency, and not 133 MHz:
http://www.intel.com/design/pentium4/dat...249887.htm
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