does p35 really oc better then x38

[zfactor]

i have been reading numerous reviews all over the net about this topic and it seems that if using ddr2 the x38 does not do as well as the p35. is this what most of you have found as well?? can anyone who has used or owned both confirm this or visa versa. love more real world feedback. thanks

[Clunk]

As I said in the other thread, it's down to what your CPU can do - If your CPU is FSB limited, so is the board. Performance wise, very similar, and from my own experiences, the P35 allowed me higher FSB, while the X38 allowed me higher Mhz.

The other thing to remember is that the extra bit of overclocking that you may or may not get from one or the other, is often at the high end and probably won't be useable for day to day stuff.

[zfactor]

okay gotcha good info there. is it true that the x38 required the heat spreader due to the higher power requirements??

[Clunk]

The IHS on the chip itself?

I would have thought that it was a long overdue feature to stop chipped corners .

It may well be what you said though, I'm not 100% sure.

[zfactor]

yeah from most places i have read the x38 requires nearly double the power of the p35 i think 36.5 watts vs 16 if i remember right they said this is why they added the heat spreader..

[Clunk]

I haven't heard that before...where did you get the info?

[zfactor]

X-bit labs - Asus P5E Mainboard Review (page 2)


"These are about the only differences between X38 and P35. However everything we have just mentioned turned out more than enough to require significant changes in the North Bridge of the new core logic. Of course, it affected the heat dissipation in the first place. The Intel X38 North Bridge features 36.5W typical heat dissipation, while the same characteristic for Intel P35 equals only 16W. Although the new chipset is manufactured using pretty up-to-date 65nm production process, the high TDP forced Intel to equip the chip with the same type of a heat-spreader lid that we have only seen on CPUs and server chipsets before."

[Clunk]

I wonder how they measured that though? And is that figure with both 16x slots being used at full whack with PCI-E 2 cards?

[k3vst3r]

Who knows perhaps internal spec sheet?
I went with X38 because it will be my last board based on lga775...x48 is just 1600mhz fsb support which any x38 can do and most p35's.

[Kelainefes]

X48 is almost pointless for those with X38 and P35 imho... My P5E (X38) runs FSB 1800 already (not even pushing to the limit) and is rock solid ...
Very few people will need the features that they will add to the new chipset.
On topic, yes the P35 will allow for higher FSBs if you buy a top of the line board and maybe add some fancy aftermarket coolers on the Voltage Regulators and NB and SB... but how many really need to get more than 1800 FSB?
I read some review (can't remember where) were they pushed an Abit IP35 Pro to FSB 2000 so if you are willing to spend more money on the cooling system than on the motherboard itself P35 could be the way to go...
Otherwise buy a case with a BIG (250mm or more) side fan and you will be ok i still have to see my NB temps go over 30 C with an ambient temp of 19/21 C on my Asus P5E.