E6400 overheating throttling

Some observations. Bios ver A25/A20/A19 have same thermal table, with it my e6400 reaches 4800rpm and stays on it, according to DIODE SKIN parameters fan stays on this high speed. I flashed old A15 bios(other thermal table), fan goes to normal 3000rpm, but other DIODES from A15 thermal table pushes my e6400 to horrible throttling after little stress. Yes, even with A25 bios i have throttling after 5-8mins of stress with orthos.

 

Take a look at A25 thermal table, we have:
SKIN (DIODE4) 49C(my current temp) Z:3(fan speed 4800rpm) {46, 127}(temp range).
fan sensor 2(probably SKIN)
0 -128 45
3000 41 48
3600 44 49
4000 46 127
4800 46 127
4800 46 127
Temp. range for this sensor is very strange, i never have speed 4000rpm.

 

I think you need to put the evidence in front of Dell support. You can give them the sensor values and the fact that the fan is running at full speed. My guess is that they would offer to replace the main board. This isn't much hassle if you have the on-site maintenance but less convenient if you have the mail-in service.

I haven't had similar problems. When my E6400 was very new I spent a week working in an office with 35C ambient temperature and the computer stayed cool (unlike me).

John

 

so I managed to convince Del Italy support to take in my machine, I have noticed that here they are trained similarly to the US support. They tell you it's not designed to run games or applications that require intensive graphics processing. So most likely they will replace the motherboard and or the heatsink. But at this point I would just like a refund and buy another machine

 

That's a load of BS. I don't care if its GPU is weak and can only run games at minimal settings, that's just fine and it is expected.

What it CANNOT do is overheat when under load, whichever the circumstances. If they repeat that load of crap, ask them why their competitors' machines (Lenovo T410 and HP 8440p) have THE VERY SAME COMPONENTS and do not overheat. I am regretting not saying that to the techs that came to my house.

 

Well that tech has nothing to do. He is just contracted firm.. his job is to come change the part and leave with the old part. Probably the Dell training he got the person said "The Latitude E6400 is a medium level powered business machine, on the left we have the new Alienware pro gaming system featuring advance cooling to prevent throttling."
Or something like that.

 

Hey dear fellows,

I just wanted to give a short extract of my Dell Support experience to you.

I had the same issues like all of the others here in this forum.

and after dell replaced my motherboard twice (...) I'm now awaiting if the problem reappears.


While idle my GPU (160m) Temp goes to a constant 96° and my Cores to about 63°, is that ok?
I've seen in previous posts, that people get much lower temps while under load (like 10° less).
can it be any good to my GPU if it is constantly (well at least over some hours) on 96°?

cheers

°edit°
I get peaks of 76° with orthos(prime) on my cores and 101° on GPU, anyhow is running furmark and orthos at the same time a real indicator of that matter? since it does use alot of ressources.

Btw my analysis of the throttling while running both test gave a funny result, it looks like with my new MB Throttling is not occuring constant anymore but rather in peaks, e.g. it throttles for 20 seconds to cool off the cores and then goes full speed again, is that how dell "solved" the problem?

 

Your problem is NOT the motherboard it's the heatsink. the GPU is at CRITICAL level. Your GPU should be at ~50C idle while plug-in.
User Everest (trial is good enough) of HWMonitor (free), to make sure the temperature are correct.

 

Thanks for reply. (they changed my heatsink today, so that cannot be the problem, can it?)

My GPU temps in idle state are about 60°-65°. (all checked with HWmonitor)
Just now, while sitting outside in the (cold, cold) night i have about 50°.
Tech Support is showing up tomorow again for another issue, shall i show him my values?
Another question: how much does ambient temperature interfere with the temps in my laptop? I have around 28° in my office, may that be the problem?

 

I didn't read all 60+ pages of this thread, but did any of you guys take apart your machine and examine the heatsink?

On my old Inspiron laptop, after a couple years the heatsink fins got clogged with dust and the thermal paste dried out so the heatsink was making very poor contact with the CPU. I vacuumed out the dust and reseated the CPU with a very thin application of fresh Arctic Silver heatsink paste and it solved my overheating issues on that machine.

I have no idea if it would be the same situation with your M6400's, but since most of those machines have been in use for a while, one of you might want to check it out if you're comfortable enough with disassembly.