Asus P4T533 and CPU speed \ VOGONS

Asus P4T533 and CPU speed

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First post, by ole smoky2

Posted on 2018-07-06, 01:36

ole smoky2 Offline

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On my P4T533 I am using a P4 2.53 Northwood and 512MB of 32bit RDRAM with win98se. I see in the BIOS that I can set the CPU speed at Manual, 1900, or 2533. It changes the FSB between 100 and 133 with a multiplier of 19. Since I'm using win98 I don't really need a lot of horsepower from the cpu so is it better to run the chip at 1900 to reduce heat and power usage, I don't really see any difference in performance either way but common sense tells me it will last longer underclocked. You guys think thats right or am I wrong?

Reply 1 of 6, by matze79

Posted on 2018-07-06, 14:14

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Power Usage is only reduced if you reduce vcore too.

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Reply 2 of 6, by Aideka

Posted on 2018-07-06, 14:31

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matze79 wrote:
Power Usage is only reduced if you reduce vcore too.

Power usage is reduced by downclocking also, just not as much as when undervolting. The CPU only uses the amount of power that it needs to run, and if the clock speed is lower, so is the power usage.

Reply 3 of 6, by ole smoky2

Posted on 2018-07-07, 00:21

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Well, I guess maybe I'm more interested in prolonging the life of the board and cpu as opposed to saving on power usage. Does it make any sense to run the fsb slower or is it pointless? Anything else I might do?

Reply 4 of 6, by Aideka

Posted on 2018-07-07, 21:16

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ole smoky2 wrote:
Well, I guess maybe I'm more interested in prolonging the life of the board and cpu as opposed to saving on power usage. Does it make any sense to run the fsb slower or is it pointless? Anything else I might do?

I wouldn't worry too much about the CPU, they very rarely fail, and if it does die it's not the end of the world since P4 chips can be had almost for free. The board is a bit more collectable, and reducing the stress on VRM circuitry might prolong its life a little bit but considering it has worked fine without underclocking for 15 years, I don't see much of a reason it would quit working anyday soon if the capacitors are doing ok. Undervolting the CPU would still be the best bet in prolonging the life of the board, and it wouldn't even necessarily mean underclocking the CPU.

Reply 5 of 6, by ole smoky2

Posted on 2018-07-08, 01:13

ole smoky2 Offline

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Thanks for that, I'll just enjoy it while it lasts

Reply 6 of 6, by dionb

Posted on 2018-07-08, 12:21

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If you're concerned about long-term stability, make sure everything runs as coolly as possible - and the most relevant bit of "everything" here is the active components on the motherboard, particularly the northbridge and voltage regulators. Good case airflow (and a reasonably cool environment) is the best thing you can do to keep everything running.

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