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R

robberbaron

Supreme [H]ardness
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Sep 6, 2004
Messages
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I'm thinking about upgrading my grandpa's Celeron system to a pentium 4 2.4C. The trouble is, the board (i845G chipset) only supports up to 533 FSB. So doing the math, instead of 12x200=2400, it would be 12x133=1600. Since pentium 4s have locked multipliers, and the computer is a Dell, I'm thinking it wouldnt run at 2.4 GHz. So would I have to get a 533MHz FSB chip? 1.6GHz would probably be a step down from his current 2.7GHz Celeron, but hyperthreading would be pretty useful for him.
 
just upgrade the motherboard too, you can get a refurbished IS7 for like 50$, i have one and it works wonders.
 
That doesn't answer my question. I want to spend as little money as possible, so upgrading the motherboard is a no. I just want to know if the CPU would increase its multiplier for the 533 FSB to reach the 2.4GHz it's spec'd at.
 
no, the multiplier is locked to a fixed ratio, not to a certain frequency.
I would check the motherboard's manufacturer for a bios upgrade that allows you higher frequencies. A lot of older "533 only" chipsets like the i845 can handle fsb 800 once th bios is modified.
 
If its a 400/533 mobo and there is no update for the bios to alow for a 800bus chip then it will never even post....+ even if it did post u would have no HT due to chipset limits...Best bet...get a IS7 and a 2.4c..be done with the rig and u can oc :)
 
BitchBreaker said:
If its a 400/533 mobo and there is no update for the bios to alow for a 800bus chip then it will never even post....+ even if it did post u would have no HT due to chipset limits...Best bet...get a IS7 and a 2.4c..be done with the rig and u can oc :)
Click to expand...

The i845 has HT support. I'll look into a bios update from dell.
 
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