Joined: Aug 29, 2007 Posts: 31 Location: Birmingham Uk
Posted: Mon May 25, 2009 7:31 pm Post subject: Q6600 - Lapping turned out a little wrong
Hi, ive just lapped my q6600 G0 cpu, but the edges have been sanded more than the centre. I need to know, whats the safest amount of sanding i can do? As theres not much left for me to sand before the copper has completely gone!
I tried it in the pc, using a Silent Knight 2 hsf, and a very thin layer of Akasa 450 silver paste to find the temps at 49c idle and 75c load! And that was only after 2 minutes.
I applied a little pressure to the hsf to see if the uneven surface of the cpu was causing a lack of contact, and yes it is. Applying pressure to one side of the hsf, pushing towards the motherboard, cools down 2 of the cores, out of the 4, but heats up the other 2. This is because the centre of the cpu is slightly higher than the sides.
I've been using basic medium strength sandpaper. What sould i use to equal the surface out?
Posted: Mon May 25, 2009 9:47 pm Post subject: Re: Q6600 - Lapping turned out a little wrong
fluidz wrote:
Hi, ive just lapped my q6600 G0 cpu, but the edges have been sanded more than the centre. I need to know, whats the safest amount of sanding i can do? As theres not much left for me to sand before the copper has completely gone!
I tried it in the pc, using a Silent Knight 2 hsf, and a very thin layer of Akasa 450 silver paste to find the temps at 49c idle and 75c load! And that was only after 2 minutes.
I applied a little pressure to the hsf to see if the uneven surface of the cpu was causing a lack of contact, and yes it is. Applying pressure to one side of the hsf, pushing towards the motherboard, cools down 2 of the cores, out of the 4, but heats up the other 2. This is because the centre of the cpu is slightly higher than the sides.
I've been using basic medium strength sandpaper. What sould i use to equal the surface out?
What Goz said is right, also it seems you used too rough sanding paper. Normally you'd want to use wet sanding paper, something that starts at 600 grit or even higher.
The other thing is the flatness of your hsf. Many "modern" heatsinks adopted to non existant flatness of the IHS to get a better contact. So some heatsinks will require you to lap them also after you finish the CPU IHS. _________________ Intel i7 2600k | MSI Z77 GD55 | 8GB Corsair DDR3-1866 | Gigabyte GTX 670 | Creative X-Fi Titanium HD
Joined: Mar 29, 2008 Posts: 473 Location: West Michigan
Posted: Thu Jul 30, 2009 9:47 pm Post subject:
Um yeah. When done correctly, you should have almost a mirror finish on the heatspreader. Yours looks...well...sanded. And the problem is, with all those tiny little grooves in the spreader, you're more than likely getting some air bubbles trapped, not to mention, you said its uneven. Thats rough...no pun intended. _________________ CPU:Intel Core i7 920 @ 3.92ghz 1.375v w/ H2O Mobo:eVGA x58 3x SLi Memory:12gb Corsair Dom. ddr3 1600mhz Graphics:2x eVGA GTX 480 SLi @ 900/1800/2000 w/ H2O Koolance VID-NX480 Blocks PSU:Enermax Galaxy 1000w Storage:Intel 510 120gb sata 3 SSD, Seagate 1.5tb, Seagate 500gb x2, WD 1tb x2 Sound:Creative Recon3d Pro Fatal1ty w/ Z-5500 Digi's, Sennheiser PC360 Displays:Samsung S27B550 / Samsung 2243BWX Case:CM Cosmos S OS:Win. 7 Ult. x64
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
