So take the 333Mhz x 2 DDR ram to get your Ram speed at a 1/1 Ratio is 666Mhz ram speed. Now if you take the Core 2 Duo or Core 2 Quads with the 1333 FSB on the CPU/4 = 333Mhz FSB Quad Pumped to get your 1333. This means on a CPU with 1066 FSB/4 = 266MHZ x2 will be your ram speed so your ram at a 1/1 ratio on a 1066 FBS CPU will default to 533MHZ you get that from your FSB x 2 so your FSB 266 x2 = 533 MHZ ram speed. and your Ram is DDR = Double Data Rateīasically at stock speeds a CPU with 1066 FSB quad pumped runs at 266Mhz x4 = the 1066. The FSB is controlled by the CPU so a core 2 duo 65nm's are 1066/4 = 266 which is your FSB however Intels FSB was quad pumped so it makes for a 1066 FSB. This is really old thread but actually you are kinda wrong on both your statements. If anyone knows different, please feel free to correct me FSB is driven by the chipset not the BIOS, as far as I know. Meaning, they want you to have to buy a new PC instead of upgradingĪlso, I'm not aware of a BIOS update that will increase the FSB speeds. This would make their PC's upgradeable beyond what they want. Being a Dell OEM, I would not expect a BIOS update to provide support for "newer & better" CPU's.
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