2.4C the best overclockable CPU?

CyberGhost

In every review that I read, when they use some test machines for overclocking they usually use 2.4C, and they always talk good of 2.4C

soon i'm thinking of building very powerful overclocked machine and was thinking if i should consider 2.4c?

BigEejit

I think that its rated as the best because it gives the best % increase .... and I think that is mainly because it has a lot of headroom, with it only being 2.4c and the exact same die as a 3.0c ..... I can get 3ghz out of mine reliably without even increasing the voltage ... but your mileage may vary as the Americans say ... i.e. there are good'uns and bad'uns .... I saw a site in the recent past where they were collating the fpo/batch numbers of 2.4c's to see what batches were good and what were bad ... its fairly inconclusive because they dont have enough samples

CyberGhost

cool! gonna get 2.4C then, it's not worth buying 3GHz if it can go that high

unkel

Seen review of 2.4c running with stock cooling at 3.3 :eek:

On better air this would be about a 50% overclock

Dempsey

Wasnt there some special stepping on some P4 2.4c's that made them excellent for overclocking?

Col_Loki

With the "C" chips in alot of cases it seems that the FSB is the limiting factor in the overclock. Some boards give out around the 250mhz FSB mark which means.......

2.4c -> 3ghz
2.6c -> 3.2ghz
2.8c -> 3.5ghz

Its alot about luck, but you want to leave as little to chance as possible so get some good Ram and a decent board and your sorted.......

unkel

Originally posted by COL_LOKI
Its alot about luck, but you want to leave as little to chance as possible so get some good Ram and a decent board and your sorted.......

Definitely. Have seen many cases on forums that people have crossed the 300FSB on air on the P4c cpu, meaning 2.4 runs as 3.6 and 3.0 running at 4.5. You need to have very good ram and a top class mobo and still be lucky with the individual chip and mobo you happen to get

You'll be unlucky not to get / approach 250FSB though

rabbitinlights

This is my 2.4 running at 3.21, It used to fail at about 3-4hours with prime95 with stock cooling, i dropped it to 3.06 and it was perfect for 12hrs+, I got a Zalman about a month ago and its running perfect at 3.21Ghz.

2.4 is the best value chip around, but make sure you get some good ram, it wont get anywhere near that without good ram.


Sean

CyberGhost

rabbitinlights - when you say fail, what do you mean? it wouldn't boot up? or say something?

unkel - how do you make those calculations?

rabbitinlights

Sorry, i mean Prime95 would give an Error, thus "failing" the test.

The PC is stable while playing games etc, but Prime95 really tests your system so if its gonna fail its gonna be while running Prime95.

unkel

Originally posted by CyberGhost
unkel - how do you make those calculations?

All P4c's run default with FSB of 200 (quadpumped) and are multi-locked. This means that a P4c 2.4 has a multiplier of 2400/200 = 12. Similarly, a p4c 3.0 has a multiplier of 15. If you manage to get the FSB on the last cpu to 300, then your cpu runs at:

15*300 = 4500 MHz :cool: