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Bus/core ratio

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March 31, 2011 2:09:48 AM

Comparing cpu's Pent. D 925 & 950

the two differences are the 925 is 3.0 ghz and the 945 is 3.4 ghz ...also the
925 has bus/core ratio of 15 ..the 945 has ratio of 17

lost on this..which one would be faster and any thoughts on why ?

I'd like to swap the 925 for the 945..problems with that ? every other spec is identical according to intel.

Thanks

More about : bus core ratio

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March 31, 2011 2:52:24 PM

The bus/core ratio is simply the internal multiplier of the CPU. That's why the 945 is faster. FSB freq 200 MHz X 17 = 3.4 GHz.

Both CPU's are from the same family. that's why the rest of the specs are the same. The speed difference is from something called binning.

After the chip dies are cut from the wafer, they are tested for speed. They are sorted into the appropriate "bins". The 925's didn't pass the highest speed tests.

There are also marketing considerations. Intel (in this case) may need a lot of 925's so they will take everything that passes the 925 tests - including some of the ones that pass the 945 tests - and set the internal multipliers to 15, mark, and package them as 925's.

You could swap a 945 for a 925 with no problems, but the speed difference is only about 12%. Unless you could get a 945 pretty cheap, the performance increase probably would not be worth it.
March 31, 2011 3:37:59 PM

jsc said:
The bus/core ratio is simply the internal multiplier of the CPU. That's why the 945 is faster. FSB freq 200 MHz X 17 = 3.4 GHz.

Both CPU's are from the same family. that's why the rest of the specs are the same. The speed difference is from something called binning.

After the chip dies are cut from the wafer, they are tested for speed. They are sorted into the appropriate "bins". The 925's didn't pass the highest speed tests.

There are also marketing considerations. Intel (in this case) may need a lot of 925's so they will take everything that passes the 925 tests - including some of the ones that pass the 945 tests - and set the internal multipliers to 15, mark, and package them as 925's.

You could swap a 945 for a 925 with no problems, but the speed difference is only about 12%. Unless you could get a 945 pretty cheap, the performance increase probably would not be worth it.





Great ! Thanks for the info...I believe the cpu I have is failing and need to replace. The 945 is only $6.00 more so it seems logical to go with that one even though the speed increase isn't that dramatic.

Thanks Again
!