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Force higher bclk gear ratio on non-k cpu?

post #1 of 5
Thread Starter 
So I've been attempting to find out if anyone has tried this? I couldnt find anything on google as everyone seems to just get the k versions and not deal with it but i got the Xeon 1240v3 as i couldnt afford a k at the time.

My question(s) are has anyone

a. tried adjusting the gear ratio on non k normally?

b. Force a gear ratio using a high bclk and assuming the mobo will adjust itself?

c. Modify the bios to use a high gear ratio on default?


I would try them myself but i unfortunately cant afford to nuke any hardware so any info would be appreciated.
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post #2 of 5
as long as you're not pushing high voltages, you shouldn't fry anything. But from my understanding, Haswell doesn't like BLCK overclocking much
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post #3 of 5
Thread Starter 
Quote:
Originally Posted by Duality92 View Post

as long as you're not pushing high voltages, you shouldn't fry anything. But from my understanding, Haswell doesn't like BLCK overclocking much

no it definitely doesnt, thats why i was trying to figure out if there is a way /anyone has tried to force a higher gear ratio, with just one step higher it would be possible to clock my Xeon as high as 4.7ghz assuming the gear ratio set everything right but i dont have a gear ratio option in my bios on my ud4h with my xeon installed so the only way to test would be to set the 125mhz bclk
Edited by Echoa - 1/12/15 at 1:51pm
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post #4 of 5
are you refering to the multiplier as the gear ratio? If so, that's what the K series chips have unlocked. Since the board doesn't decide if this is possible or not, you cannot simply mod the bios, you'd have to buy a processor reader and more the microcode in the processor, but that could set you back a few thousand dollars and wouldn't be guaranteed to work on top of needing to learn how processor microcodes are written.
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post #5 of 5
Quote:
are you refering to the multiplier as the gear ratio? If so, that's what the K series chips have unlocked.

Haswell (as well as lga2011 stuff maybe?) can use different base clock straps
Quote:
When you use the straps, the PCI-Express and DMI busses automatically run at 100 MHz though a 5:4, 5:3 or 5:2 ratio.

So you can keep PCI-E and DMI at 100mhz, and run 1:1 ratio (100mhz base clock) or 5:4 ratio (125mhz), 5:3 ratio (166.7mhz) on the base clock of the CPU, without "overclocking" it. If there was 5% base clock headroom for example, you could do 100mhz, 125mhz or 167mhz +-5%. 105mhz, or 175mhz depending on the strap used.

Unfortunately it usually doesn't really give better results while overclocking regular Haswell, and it's also locked to k-chips only as far as i know.
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