x60s => L7400 vs L2400 : silence and autonomy

[pibach]

yes, I know these results. This is true under high load. But not under average or low load. Santa Rosa is a good 20% faster as well. If you do office stuff you get reduced power consumption.

[Justintoxicated]

X61S has 2 fans inside according to the picture I looked at here
http://forum.notebookreview.com/showthread.php?t=141875

[hackinger]

Hi Perfect007,

did you buy the notebook? If yes, please let us know
if the noise was ok ...

Thanks

hackinger

[gunston]

X61S has 2 fans inside according to the picture I looked at here
http://forum.notebookreview.com/showthread.php?t=141875

2nd FAN will only be installed for the model equipped with WWAN only.

[krumli]

It's a shame X61s runs hotter, consumes more energy and so runs the fan often than X60s.

Progress...

I was thinking of replacing my beloved X31 by a X61s but with the fan running often: NO WAY

Why Lenovo/Intel don't manage to have a fanless C2D solution ( more powerfull that the Atom )

[Nickolai]

Why Lenovo/Intel don't manage to have a fanless C2D solution ( more powerfull that the Atom )

Hey, why not Atom.. That would be enough to make a person like me happy! But from what I've seen in the past I doubt there is enough demand for laptops with yesterday's hardware (I think that's how they see ULV processors, Geode, Atom).

X61S has 2 fans inside according to the picture I looked at here
http://forum.notebookreview.com/showthread.php?t=141875

2nd FAN will only be installed for the model equipped with WWAN only.

Thanks. This is very educating.
Is the second fan also there in the X60s models with WWAN?

[rek]

Thanks. This is very educating.
Is the second fan also there in the X60s models with WWAN?

The second fan was something new that was introduced in the X61/s series, to address complaints of the warm right palm rest.

No X60/s units have the second fan, not even the WWAN models.

[Nickolai]

No X60/s units have the second fan, not even the WWAN models.

That's exactly the way I like it! Then I really want an X60s, not X61s.

By the way, yours looks like my dream machine. It's going to be hard for me to get a X60s with WWAN...

[IvanAndreevich]

I'd like to share my experience in this area.

In general, Core 2 Duo is MUCH hotter under load than Core Duo. I don't care what Intel puts in its TDP numbers - the actual difference is much larger than 2W. I ran a heavy CPU stress test (Prime95 or linpack) on a C2D L7400 X60s and it was pulling 35W from the battery. In fact, the battery couldn't hold this load and the machine would shut down. You better believe that the CPU was sucking way more than 17W. Depends on your luck of the draw too - some CPUs just use more power than others.

I had the motherboard replaced under warranty because this thing was getting to 94C in a 22C room _AFTER_ the CPU fan has been replaced. Remember, this is no ordinary load - it's the ultimate CPU torching stress test left to run for a few hours. The new CPU runs 20C cooler under load, so guess how much less power it uses. That's the same same CPU - L7400. Batch, and production date (i.e. revision and even what wafer it came from - a good one or a crappy one) can make a HUGE difference in power consumption.

L2400 vs L7400 - there is no clear winner. L7400 is faster, L2400 runs cooler and uses less power. The difference is not huge either way. Personally I would opt for the L2400 because silence and battery life is more important to me. I use an X61s now with the L7500. These suckers tend to be in the middle between the "old batch" L7400 CPUs from X60s and the coolest running L2400 Yonah chips. It's better in idle because it supports SLFM which the older chipset in X60 does not.

[avdim]

I can share my experience with x60t tablet. I replaced the motherboard on used rather cheap x61t one from eBay with Santa Rose and L7400 C2D mainly to get the second PCI slot to install Broadcom HD decoder. Immediately I saw dramatic increase of CPU temp, up to 90+C under stress load. I then removed CPU fan and place Arctic MX-3 thermal paste instead of stock one and saw temp drop up to 10C or even more. Just to mention I removed thermal rubber on second chip (northbridge?) and apply paste on it also, though there is a hole between cooler and chip so it will be better to try to modify cooler somehow.
Even after modification system runs hotter than x60t both idle and under load. Undervolting with PMClock finally gave me approximately the same effect as x60t mainly because L2400 does not allow drop VCore practically at all and L7500 have some room, though I would like to have much lower limit (it is 0.850v on my chip).
CPU fan on x61t runs much louder than on x60t because of higher speed. With TPFanControl it is possible to adjust it but without fan running the system quickly become hot and though the minimal spin is acceptable I can say that x60t fun runs on less FRM than x61t with the same minimal level 1 (there are 3 or 4 real levels of fan speed adjustments).