M4700 Owners Thread

Well I figured this out last night. I decided to check the CPU heat sink, so I stripped it down again and sure enough there was a very small area that wasn't making a good contact with the core. I redid the AS5 and now, it turbos up to 3.6GHz on all four cores and doesn't get above 80c. Result.

 

Anyone can backed up M4700 Bios as ROM file?
My Bios has bricked and i need one backed up file to recovery my BIOS.

Need help!

Thanks so much

 

Screen's a POS, absolute beast of a machine otherwise.

If possible go with an external monitor for primary display.

 

What are you guys getting for idle operating temps?

With i7 3840QM and Nvidia K1000M I am getting low 50s idle temps, generally quiet machine as a result.

Thinking of doing a repaste, however, as Nvidia card periodically jumps to high 50s while working in a terminal window or other non-GPU intensive task; as a result the GPU fan click-whirrrrrrr kicks in, which is annoying.

With a repaste I'd expect to get idle temps in the low to mid 40s and hopefully have a silent machine under light load (browsing web, checking email, etc.)

Anyone repaste and experience wished for silence?

p.s. on Linux so cannot underclock the GPU, Nvidia provides no means to do so on latest chips ;-(

Thanks

 

You should check the thread on swapping the heatsink in the M6700. The M6700 uses two copper heat pipes with the 3920XM/3940XM but one copper heat pipe with other CPUs including the 3840QM. Upgrading the heatsink to the two heatpipe version only costs about $20 with shipping from Dell's spare parts department.

I imagine it is the same story in the M4700. Thing is, we don't know the part number for the dual-pipe heatsink in the M4700 (if it's actually not the same).

Just another way to go about lowering your temp. If you're going to be digging around inside the case anyway...

 

My M4700 3840QM came with a dual heatpipe CPU heat sink.

Even after a second repaste, I'm still seeing a 14c temp variance between core #0 and core #3

 

I did see the 6700 heatsink/repaste thread, motivated the question asked here ;-)

Sounds like 4700 has dual copper depending on the CPU, will have to see when I look under the hood.

Of course, mixed results, one person in 6700 thread reported slightly higher temps after swapping heat sink and repasting, yikes, high risk, no reward.

 

14c temp diff between cores?? That doesn't sound right...

I'm actually OK with CPU temps, as good as it's going to get on BIOS + OS downclocking/power saving front (which is to say, way better than the alternative, 70+ idle temps).

GPU, on the other hand, Nvidia really shafts the Precision workstation user that does not have the M3000 (only model that currently is able to have clockspeed adjusted via Nvidia knobs); this particularly hits Linux users who have no choice but to accept whatever temp/fan control policy Nvidia has built-in to the black box driver. At least on Windows you can install a 3rd party app. and tweak clock and fan speeds at your own risk.

Anyway, a repaste is in order, GPU fan kicks in at 57c, which I can top when browsing the web, moving a window around the screen, etc., no need for 3d games or anything of the kind -- means short click-whirrrrr fan cycles that would not exist if I could underclock the chip.

Hopefully I can shave off 5c or so and prevent GPU fan from kicking in under light load. We'll see

 

That was me.

I suspect this is because the single-pipe heatsink had been repasted by a tech but I used the stock paste on the dual-pipe. We'll find out, I'm going to repaste the dual-pipe heatsink next week sometime.

 

Ah, ok, too bad, repaste should get you on the positive outcome end of the spectrum.

I did get a 10c drop when I scraped off shoddy OEM paste in old laptop.

Assume Dell does a better job, we'll see, my goal is idle temps in the low 40s ;-)