NP9377 with 4910MQ

I've had this notebook for 2 days and have overclocked out of the box with Intel XTU. Have had it running at 4Ghz on all 4 cores but for fun I tried a stress test at stock for the cpu and was shocked by the lack of performance.

Are these settings @ stock normal? Short TDP 58W, Long TDP 47W, Current limit 72A, 39/38/37/37?

Reason for asking is that under XTU stress testing the cpu fails to even achieve the rated 3.7G on 4 cores, it is instead throttled down to 3.3G by power limit throttling. I'm quite shocked by this as it means people are buying these cpus and never even getting the rated performance out of them!

 

Well, it's power throttling because your'e not giving it enough power... Haswell needs quite a lot of power so increase your current limit and TDP levels.. BTW, even my 3940XM needs a current limit of 85A and TDP Levels of short: 50W and turbo max:60W to run at 3.8GHz constant...

 

Exactly, TDP and current are used by intel to limit the speed under high load to keep within design specifications. Raising them is not overclocking the CPU as such but it will get hotter (and stress the motherboard VRMs beyond spec).

 

3.8G on my 4910MQ uses up 65W when encoding h265, it's more intensive than XTU stress testing, temps peak at 90 degrees with auto fans. I even tried replacing the paste with liquid ultra twice but results were really bad and didn't want to risk pooling the liquid ultra in case it spills over. Reverted back to GC extreme.

3.9G uses upto 72W, temps peak at 95 degrees with auto fans.

I think I will have to stick with 3.8G unless there is a better cpu heat sink or fan available.

 

Main problem is that your 4910MQ hasn't made you win the lottery.. Also the heatsink is famously known for not making proper contact.. I think the best you can do is raise the back of your laptop and use max fans.. Auto fans is not really recommended... That should allow you to reach 4.0GHz and keep it at 90C...

Also, I'm not too sure about this but I've had an idea festering in my brain.. To cause better heat transfer from CPU to heatsink, why not put some thing copper shims/plates on the CPU die and then screw your heatsink on so the gap is reduced?

 

Nervous on adding a shim since we have bare dies, too much pressure and you run the risk of cracking the die. I noticed the cpu fan is much thinner than the gpu fans and that's reflected in the lower volume of air exhausted.
My old AW M18x R1 had a higher air output and kept the cpu cooler with a higher TDP. But that had a 3 pipe heat sink n thicker fan. I'd really like to get a better heat sink and/or fan. The fan tables also seem to be a bit on the low side since max fans drops the temps by a good 5 degrees or so. If we could change those it would also help.
Last resort would be to lap the heat sink but that could reduce the pressure on the die. So many limitations, with a better cooling solution this notebook could really fly! I managed to score 965 on XTU benchmark with a 3.8G oc. Temps are all that stand in the way of higher multis.

 

It really looks more and more that my idea of getting a 4810MQ is a good one...

 

The 4810MQ is a very nice value chip, it offers a lot of tweaking potential without breaking the bank.

 

If I use max fans on gaming-periods for my NP9377, will it break the fans?

 

No lol...... They're designed to be used at those rpms.. Just don't use max fans 24/7...

 

I used max fans 24/7 for four years, two months and 20 days on my D900F and they still work perfectly. The only difference is that your machine will pick up dust faster than on auto when you're idling.

 

It's also a little noisier You should not need to max them all the time.

 

^ well that too. I kept them max just on principle. I left the machine on all the time; usually downloading stuff overnight, and I just left on max fans. It didn't harm the machine nor break the fans in any way, though I didn't *NEED* to. But I was just trying to point out that it won't kill the fans or anything.

 

Reminds me of the server rooms I have worked in, max fans all the time for the system ones. Now if one of the power supplies goes you get delta screamer levels out of the other. Makes it really easy to trouble shoot though! Dual 1.5KW delta beastly supplies makes you realise actually as a portable server how much of a shrink the P570WM is.

 

I won't lie, I wouldn't mind feeling the rugged feel of a D900F-styled machine again. I just want like two weeks with a P570WM. Just to... love it.

 

*shuffles machine away to safety* *cough*

You certainly notice when you are holding it.

 

I have absolutely no problems with the P370SM3's chassis (well... maybe this pathetic invention called CPU cooling it has compared to previous models) but be that as it may, the D900F was a MUCH sturdier and hardier machine. I can see the D900F in the P570WM is all.

 

Oh the two are certainly related.

 

Yeah both P570WM and D900F are not for me.. I can barely lift the my M17x R4.. Don't want 5kgs++ machines.. That will break my back.. not to mention, I'll need a new bagpack..

 

Think I've hit the limits for the np9377 cpu cooling. I've modded the cpu intake on the bottom to increase air flow, lapped the cpu heatsink and pasted with liquid ultra. Overclock at 4G, vcore 1.131v, ambient temps @ 18c. Fully loaded 4 cores with h265 encoding and can maintain temps @ 92-95c no throttling.
The cpu maintains 80W power. Can't think of anything else to lower temps for 24/7 use.

 

How about 6KG+

 

And max fans?

Also, as I told you multiple times before, the P370EM CPU and slave GPU heatsinks are the only way to get the really best cooling out of this thing. It just is. Your slave GPU will get a little hotter, but it's maxwell so "a little hotter" is still "cooler than my 780Ms will ever sit".

 

I'll be stressing gpus next, what's the throttling temps for gtx980s? Just want to make sure I have 10 degrees overhead on my slave gpu before I reduce it's cooling with 370em heatsink.

 

I've absolutely no idea. Kepler was 92 degrees. Maxwell might be higher. Doesn't matter though; Maxwell doesn't get NEARLY as hot.

 

You wont reach them at stock even with the P370EM heatsink.

 

Under 3dmark, the gpus get 84c under firestriker. The fans don't seem to really spin up though, are the fans either off/on with no intermediate speeds?

 

No there is a fan curve but it's set more for noise than temperatures.