Upgrade 667MHz FSB CPU Tags: CPUs BIOS Processors Last response: June 7, 2010 2:12 PM in CPUs Share ensefik June 4, 2010 7:42:45 PM Hello, I wish to upgrade the processor on my Toshiba P205-S6347 which has a Santa Rosa GM965 chip-set with a T5450 cpu running at 1.66GHz 667MHz FSB I am not sure if because of the T5450 cpu, my laptop's FSB has been scaled down from 800MHz to 667MHz , and if so, by using a 800MHz cpu and BIOS changes, the FSB can resume at 800MHz. I have read that the motherboard FSB might be upgradeable via the BIOS so that I can look for 800 MHz FSB CPUs >= 2.40GHz. Does anyone have any experience of doing something like this? More about : upgrade 667mhz fsb cpu das_stig a c 93 à CPUs June 4, 2010 8:56:26 PM Even if you could upgrade the cpu, you would probably cause serious heat issues as the design of the cooling is for specific speed/family of cpu's and anything else is taking a risk. If you do plan to do it, make sure cpu runs at 1.66Ghz to keep temps in spec and you'll have to swap your memory to get the full benefit of a fsb increase. ensefik June 7, 2010 2:12:21 PM das_stig said:Even if you could upgrade the cpu, you would probably cause serious heat issues as the design of the cooling is for specific speed/family of cpu's and anything else is taking a risk. If you do plan to do it, make sure cpu runs at 1.66Ghz to keep temps in spec and you'll have to swap your memory to get the full benefit of a fsb increase. Good point about the running temperature, though a lot of the 800MHz FSB intel chips are at 45nm and run cooler than the 65nm 667FSB chips of lower GHz range. I am still wondering about the FSB changing from 667->800 via the BIOS, does anyone have any experience here with laptops Can't find your answer ? Ask ! Publish Related resources My DDR2 2GB ram is 800Mhz but it shows 667Mhz in CPU -Z Forum RAM 8GB @ 667mhz VS. 4GB @800mhz Corsair Dominator Forum 1GB DDR2 667MHz RAM in dual or single channel for Core 2 Duo Forum 1066mhz ram running at 667mhz ? Forum 800MHz FSB with 667MHz DDR2 SDRAM? Forum P3 667Mhz 133 FSB on a P2B Forum 667mhz RAM with 800mhz FSB ? Forum CPU -Z reports that a DDR3 1333 Memory is capable of going upto 667Mhz ! Forum Memory speed: CPU FSB - need clarification Forum Question on CPU , Memory, and FSB Speed Forum Ram for a FSB 1333 CPU Forum DDR2 667Mhz CLass 5 vs CL6 Forum Confirming What I've Learned: CPU , RAM, FSB Forum Mobile XP 2500 showing up at 667Mhz Forum Which Motherboard and Ram matches my CPU 's FSB speed? Forum Is this compatible? Forum [Solved] Would a Phenom II 940BE be a good upgrade! Forum Gaming CPU Forum [Solved] do i need to Flash the BIOS on my Biostar Motherboard for a new CPU??? Forum Upgrade help Forum More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !