stormyandcold Posted December 2, 2015 Share Posted December 2, 2015 I've been playing COD:BO3 and noticed my 3920xm was hitting upto 104c then throttling. I decided to remove the ICD24 and use coolaboratory liquid metal pads (laptop kit). It's my preferred material for my gpu which has been working brilliantly (72C max playing COD:BO3 with near max details for 90minutes).I didn't want to take all the screws off so, I used a red 2x4 lego brick on it's side and 800 grit wet n dry cut into squares to fit the lego brick and lapped the cpu heatsink. Took about 5minutes. Now my cpu is around 94c load so I got at least a 10c+ drop. Recommended. Quote Link to comment Share on other sites More sharing options...
Khenglish Posted December 2, 2015 Share Posted December 2, 2015 @op from your pics it looks like you did not lap the heatsink well. The main purpose of lapping is to level the heatsink, with polishing it second. I still see a bend from when the heatpipes were pressed onto the contact plate showing. Sand more with low grit. Quote Link to comment Share on other sites More sharing options...
hoani Posted December 2, 2015 Author Share Posted December 2, 2015 @op from your pics it looks like you did not lap the heatsink well. The main purpose of lapping is to level the heatsink, with polishing it second. I still see a bend from when the heatpipes were pressed onto the contact plate showing. Sand more with low grit.Thanks for the tip. It does not appear to me as a bend when observing it more precisely by I'll do as you mentioned.I've also received 1000/1200/1500/2000/3000/4000/5000/7000 grit sandpaper for final polishing. I think I will apply them to my heatsink and my CPU die.I've just received my Collaboratory Liquid Ultra so I hope I'll see a difference after polishing + liquid ultra.Thanks for your help !- - - Updated - - -I didn't want to take all the screws off so, I used a red 2x4 lego brick on it's side and 800 grit wet n dry cut into squares to fit the lego brick and lapped the cpu heatsink. Took about 5minutes. Now my cpu is around 94c load so I got at least a 10c+ drop. Recommended.Thanks for the lego trick, I'll try it tonight.- - - Updated - - -prime95 will sooner or later destroy the vrms if u keep it running for hours, also keep in mind hat lenovo never ment the extreme cpus to overclock so the vrms arent designed to provider 100w over a long timespanHi,I'm monitoring the power drawn by the CPU using HWInfo64 and it nevers go further 58W. Anyway, thank you for the advice, I'll take caution on this variable when trying to OC (if I ever be able to). Quote Link to comment Share on other sites More sharing options...
stormyandcold Posted December 3, 2015 Share Posted December 3, 2015 Hey bro, you don't really need anything beyond 1500 grit, 2000 for mirror finish is enough. The rest is a waste. Quote Link to comment Share on other sites More sharing options...
hoani Posted December 3, 2015 Author Share Posted December 3, 2015 Hi everyone, I decided to relap my heatsink as suggested by Khenglish. I used straigt legos for my plane surface, my arms and a LOT of patience. Starting with 60/150 grit : This was ULTRA long to complete this step (nearly 2 hours) and I wasn't totally satisfied with the result since I was able to see very slight deformation due to the pipes when they were pressed... but less than initialy. Look at the quantity of material I lapped ! Then I switched to 240 grit : I spent 10 minutes on this. Then I switched to 600 grit with water : It tooks 10 minutes to complete. Then I switched to 1500 grit : As you can see, depending on the angle, the surface is reflective or not. The second photo is took from an angle where you can observe the remaining imperfection I wasn't able to completely remove (it would take 1 more hour at 60 grit to be perfect). Last finish at 3000 grit : Time to put this baby on the CPU... But first, I need to replace the pad for the PowerFETs I ruined during the lapping session. I used K5 PRO and tried different amount to get contact without tilting : Then I applied the Coolaboratory Liquid Ultra on my previously lapped CPU die... Some splits around but not a problem (it was 0:00 o'clock at this time and I was tired to get too much attention about details) : I did not forget to put a little layer of Liquid Ultra on my heatsink too : And now... the results at stock : 80°C MAX ! We have a winner ! Lost nearly -15°C/-20°C with those operation ! Woooot ! So I tried to OC to 4.2GHz and here are the results (only look at HWinfo64 max column) : 95°C MAX, great too ! This OC was done with no directions on XTU, I just bumped my TDP limits and the multipliers... Do you guys have any advice or links to specific posts for XTU OC ? Anyway, I'm very happy now with my laptop, I thank everyone for their help. Cheers 2 Quote Link to comment Share on other sites More sharing options...
Khenglish Posted December 3, 2015 Share Posted December 3, 2015 Good job! It's so unfortunate that Clevo sold their systems with the warped heatsink plates. They have very good CPU cooling with the large dedicated fan and large copper radiator.Overclocking a Ivy Bridge CPU is very simple with XTU. I addition to what you've done you can use the "additional turbo voltage" for higher clocks. This setting will raise your CPU voltage at all turbo multiplier points by a fixed amount. Ex. x42 runs at 1.256V, with +50mV will run at 1.306mV. You can go all the way up to 1.501V, which is beyond the safe point for the CPU to run for 24/7. I only suggest using this for benchmarks. Anything under 1.4V should be fine for 24/7 use if you keep the temperatures in check.Also, don' forget you can OC memory too. This does have a significant impact in some games and CPU tasks. Quote Link to comment Share on other sites More sharing options...
hoani Posted December 3, 2015 Author Share Posted December 3, 2015 Also, don' forget you can OC memory too. This does have a significant impact in some games and CPU tasks. I would like to but I'm afraid of reaching the crash limit... on my desktop, I only have to reset my bios settings... with XTU... I don't know Quote Link to comment Share on other sites More sharing options...
Khenglish Posted December 3, 2015 Share Posted December 3, 2015 I would like to but I'm afraid of reaching the crash limit... on my desktop, I only have to reset my bios settings... with XTU... I don't know If it's unbootable you pull or add a memory stick. Boot, shutdown, then put the memory back how it was and it will be reset. Quote Link to comment Share on other sites More sharing options...
hoani Posted December 4, 2015 Author Share Posted December 4, 2015 If it's unbootable you pull or add a memory stick. Boot, shutdown, then put the memory back how it was and it will be reset.Thanks for the tip.What are the limit you've reached while OCing your RAM ? Quote Link to comment Share on other sites More sharing options...
Khenglish Posted December 4, 2015 Share Posted December 4, 2015 Thanks for the tip.What are the limit you've reached while OCing your RAM ?I usually run 9-10-10 2000 MHz.Also this is getting a bit off topic. Quote Link to comment Share on other sites More sharing options...
CaerCadarn Posted December 6, 2015 Share Posted December 6, 2015 You can get a free sample of pressure film from: http://www.sensorprod.com/index.phpChoose the ultra low variant. Then you can make sure, if your heat sink is still warped. Quote Link to comment Share on other sites More sharing options...
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