Celly 1.2 or 1.4?

Whats' faster?

Celery 1.2 @ 1.6 (133fsb)
Celery 1.4 @ 1.7 (122fsb)

These seem to be the average these chips reach. Which would be faster overall? Gonna buy one soon.

Damn,
Just did a check and it looks like a lot of 1.2's don't reach 133fsb
So I guess the 1.4 would be a safer buy? Do most of them hit 122fsb?

You prefer "safe" chance at 122 over 50/50 chance at reaching 133fsb?

(and "safe".. there's not a lot of info on the C1.4.. but as it has a higher T junction rating it should go (slightly) higher than the lower speed cores)

I don't know what mobo you have, but in a lot of mobo's 122 puts more strain on the pci and agp than 133.

If you have the right components a better choice is perhaps a C1.1 that can go 133fsb more easily and a good chance for somethin extra (140mhz fsb)

I think 1600(133) is about equal to 1722(122).

CPU is 7.5% faster, RAM is ~9% slower, AGP and PCI can be ~20% faster

Well, I have trouble to make my celly 1.1a to reach 133fsb, this is at 1.7v, I would say the chance for 1.2a to reach 133fsb is pretty small unless you know you are getting phillipine 2002 chips.

Yep,...

It has been asked many times in this forums. The general consensus seems like being :

- Go for a 1.0A or 1.1A for maximum overclockability, as long as you have 1/4 PCI dividers. Go 1.0A only if you have very good RAM and a system suitable for real high FSBs.

- Go for 1.3 or 1.4 chips ONLY if you lack 1/4 PCI divider.

Although there are exceptions, it *seems* like a reasonable expectation for O/C a tualatin core is around 1.5-1.6 Ghz. Over that you have to be very luck and be using extremely good (read normally noisy) cooling.

I do not think it is a realistic to look after 1.7 Ghz overclock at this point (very few lucky people reach that).

Regards
FTC

I believe that the 1.1a chip is 99% to reach 133fsb but you will most likely need to do the vid pin trick to set vcore volts up to 1.75v or more. The 1.2 chip will be 50/50% to hit 133 @ 1.8v most likely too. The 1.4 chip is too new to know its limits but running a tully chip at less than 133 fsb is a huge bottleneck to a fast processor. I have had 3 tulys, a 1.3a @ 1521 (117fsb) a 1.2 chip @ 1596 (133fsb) and a 1.1a chip @1540 (140fsb) and I believe that the 1.1a is the best overall chip since nearly everyone of them will hit 133fsb. the only reason that they wont is because some ppl are afraid to or do not know how to set there vcore up to 1.75v or so. These chips are safe up to 1.825v but you must use a really good copper hsf for max stable oc'ing. the factory hsf is only good to about 1450mhz @ 1.6v or so.

personally, I would say go with the 1.1, it will generally do 133 FSB easily if not more with a bit more vcore, I can reach 133 FSB with 1.625 or 1.65 vcore and 140FSB with 1.75vcore. But you'll need a good copper heatsink(like the Swiftech MCXC370) to keep the temps down..

Actually, my motherboard can set PCI divider to 1/4 when the fsb is under 133. But the PCI would get slightly underclocked, is that dangerous?

Paulie,

No, it's not dangerous... If you can use 1/4 divider, go for the 1.1!

Regards
FTC

Thnx for all the info guys, I will buy a celly 1.1 and see how far I can take it
Too bad I don't have a copper hsf. I've got a lapped Alpha PEP66 w/ 60mm Delta and AS3. Is this cooler good enough for high oc?

paulie said:

Thnx for all the info guys, I will buy a celly 1.1 and see how far I can take it
Too bad I don't have a copper hsf. I've got a lapped Alpha PEP66 w/ 60mm Delta and AS3. Is this cooler good enough for high oc?

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Before you end up doing any LARGE mistake ,just read this ..
http://www.asusboards.com/forums/showthread.php?s=&threadid=18276&perpage=15&pagenumber=1