Not sure if i should lap my 920
- Thread starter Sem
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no brasso? hummm what shall i use as a lube then? xP and ive just been on the phone and explained that it wasnt makign contact properly and if i could rma it after lapping my heatsink and they said "yes that should be fine, go on the website and get an rma number and if you could link a picture to help explain that would be good" and i said its working fine but i do intend to overclock it so it might hinder its performance as it is a D0 and they say its ideal for overclocking xP abnd he said yes that would hinder the performance of overclocking. so gunna give lapping a go, if not ill rma it on monday.
so yea no brasso..... cooking oil? better? xP
Very small amount of water or use the wet & dry paper dry. Largely personal preferance though, I'd use several sheets in rotation, washing them when full of dust and letting them dry off before using them again. With the TRUE use whatever lubricant you like, water's still quite good
Did I read that right? Lapping does not prevent you rma'ing the processor to intel?
Did I read that right? Lapping does not prevent you rma'ing the processor to intel?
I told them i was lapping my cooler to see if ther was any impriovement on the surface contact, not lapping the CPU, so if it isn't improvend then I can RMA the CPU for a "flat" one
so i would imagine if you lap the CPU then warrenty is void as ya 3rd party machined it effectivly.
Im considering lapping my q9550, its am oem chip so only one years warranty, currently it loads at 54-50-46-46 @3,8ghz, it would be nice to get all the cores within a few degrees of each other, im using a lapped TRUE black which i had good results with a lapped q6600.
i spoke to ocuk, i said i intended to overclock in the future. its all @ stoct atm
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wonder what the return's criteria is for the D0 - after all it does say:
'Ultra Overclockable D0 Stepping (SLBEJ) Version to allow the highest overclocks and lowest temperatures possible. Achieve 975 performance at 920 pricing.'
so if I don't get 975 performance at lowest temps avail I can rma it? What is 975 performance and what are lowest temps?
'Ultra Overclockable D0 Stepping (SLBEJ) Version to allow the highest overclocks and lowest temperatures possible. Achieve 975 performance at 920 pricing.'
so if I don't get 975 performance at lowest temps avail I can rma it? What is 975 performance and what are lowest temps?
Looking at pics, there does seem to be enough to make a one or two degees dif in temps, but unless it is really bad it makes no dif.
If you have a flat cpu to a flat h/sink, why use t paste. Other than to stop two parts gluing together.
Exactly. The heat goes from CPU to H/sink.
The only reason for paste is, unflat surfaces.
Another marketing ploy.
If you lap your parts flat it is not the paste that lowers temps it is your heat extraction.
If you have a flat cpu to a flat h/sink, why use t paste. Other than to stop two parts gluing together.
Exactly. The heat goes from CPU to H/sink.
The only reason for paste is, unflat surfaces.
Another marketing ploy.
If you lap your parts flat it is not the paste that lowers temps it is your heat extraction.
yea t paste is used to bridge the gap but if that doents even reach xP lookint at my pic its prob about 1/4 or even a 1/3 of the cpu isnt touching the cooler
EDIT:
lapping TRUE cooler, 400/800 sand done, 1000 in progress
EDIT:
lapping TRUE cooler, 400/800 sand done, 1000 in progress
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right just lapped the HSF and its nice and shiny im still sure tho that the mobo clamp is having an effect on the chip tho....
but anywho.. ive been trying to get pics up but imageshack is throwing a wobbly and when i upload the pics they dont come up and when i delete older ones then dont delete xP
going to do the washer mod but not sure how thick a washer i should go for, i have 4 washers, 3x1mm (two metal and one rubber) and one 4mm rubber one... how thick should i go? was thinking one 1mm rubber and one 1mm metal...?
im still sure tho that the mobo clamp is having an effect on the chip tho....but anywho.. ive been trying to get pics up but imageshack is throwing a wobbly and when i upload the pics they dont come up and when i delete older ones then dont delete xP
going to do the washer mod but not sure how thick a washer i should go for, i have 4 washers, 3x1mm (two metal and one rubber) and one 4mm rubber one... how thick should i go? was thinking one 1mm rubber and one 1mm metal...?
ok wtf.... ive lapped this cooler and now its only touching the cpu on the outer most edges..... what the hell... 
really starting to get annoyed with this...
now apparently the cpu chip has a dip in the middle, or raised edges.... bah im so confused i just cant win
EDIT:
right ive put a bit more thermal paste on as i went very sparingly when i just tried it, the temps have drop since the last one so its making better contact but they are higher than before i lapped so i suspect its still not making proper contact... what am i to do
really starting to get annoyed with this...now apparently the cpu chip has a dip in the middle, or raised edges.... bah im so confused
i just cant winEDIT:
right ive put a bit more thermal paste on as i went very sparingly when i just tried it, the temps have drop since the last one so its making better contact but they are higher than before i lapped so i suspect its still not making proper contact... what am i to do
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I read somewhere that the thermalright true coolers are not completely flat to compensate for the intl IHS being concave because the IHS heats up and warps slightly when they solder it to the CPU die. I cant remember where i read this and if its reliable but i would lap the cpu too if its not flat, which is what you seem to be experiencing.
If you dont want to do that another thing to try is apply the thermal compound by placing a small dot on the ihs surface and use the cooler to spread the compound by twisting it and applying pressure, that way you garantee most of the compound will be where the surface is concave. I always do this and it seems to give me better results.
heres a youtube on different spreading methods.
http://www.youtube.com/watch?v=EyXLu1Ms-q4&feature=related
I used a washer on each screw of the TRUE cooler 2mm thickness as I just wanted it to compensate for the lapping.
If you dont want to do that another thing to try is apply the thermal compound by placing a small dot on the ihs surface and use the cooler to spread the compound by twisting it and applying pressure, that way you garantee most of the compound will be where the surface is concave. I always do this and it seems to give me better results.
heres a youtube on different spreading methods.
http://www.youtube.com/watch?v=EyXLu1Ms-q4&feature=related
I used a washer on each screw of the TRUE cooler 2mm thickness as I just wanted it to compensate for the lapping.
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You sure it's now only contacting at the edges? When you take it off, this would look like a large amount of paste in the middle and not much around the edge. A photo would be good here.
When I lapped my e8400 the middle was the first part to turn coppery. In fact I stopped while there was still some nickel showing on two of the edges, it was flat and the area over the core was the important part. So I don't believe that cpu ihs are always concave.
Sounds like you'll get an rma for the chip if you want it, otherwise lapping the chip is worth doing. It's difficult to bring yourself to take sandpaper to a £200 chip though, I don't think I'll be brave enough to lap my one unless temperatures are really giving me trouble.
When I lapped my e8400 the middle was the first part to turn coppery. In fact I stopped while there was still some nickel showing on two of the edges, it was flat and the area over the core was the important part. So I don't believe that cpu ihs are always concave.
Sounds like you'll get an rma for the chip if you want it, otherwise lapping the chip is worth doing. It's difficult to bring yourself to take sandpaper to a £200 chip though, I don't think I'll be brave enough to lap my one unless temperatures are really giving me trouble.
ok when i took it off and it was only on the edges i only put on a tinyyyyyy bit of thermal paste and also didnt do the washer mod. this time i put on about that same ammount that i did before the lapping and put a few washers in the middle (now the bottom of the brace is just over a 2p's thickness above the top of the cooler)
still trying to get pics up but imageshack is still being ghayyy xP
the temps are pretty much what they were befor the lapping maybe 1-2 *C hotter now... which is odd cos when i checked this time the majority of the chip was in contact. to the cores are like 65,61,59,61 that one core is always a couple degrees hotter.
and in response to jon, yea i wouldnt mind lapping the cpu.... if it wasnt 200£ worth xP like i have my old e8400 and i wouldn't think twice about lapping that now.... but this chip is too new and expensive to me xP
and thanks for the vid link
watched the mx-2 vid too....think ill go for either the pea or the rice grain method, see if they give me better contacts would like to get one of thos see through perspex blocks too, would be good to see how it spreads on the cooler and cpu, see which is more at fault
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here's the HSF after an initial brief lap with 400
looking flatter now
now after 800
after 1000, starting to look shiny
and finally after a while on 2000
must admit tho there are still tiny grain marks that ya can see in the pic but its still pretty damm good i think
here it is with the razor and light... not too sure what to make of it tho, the razor is like 20 years old xP
definitly better than it was.
and here are the washers...
i'm using the top 3 in that order now ill try and get some contact pics up in a bit...
looking flatter now
now after 800
after 1000, starting to look shiny
and finally after a while on 2000
must admit tho there are still tiny grain marks that ya can see in the pic but its still pretty damm good i think
here it is with the razor and light... not too sure what to make of it tho, the razor is like 20 years old xP
definitly better than it was.
and here are the washers...
i'm using the top 3 in that order now
ill try and get some contact pics up in a bit...right been debating which method of thermal paste application to use. ive managed to find a very small glass jar with a flat bottom so ive been looking at the flatness of the cooler and cpu and how the paste spreads, when i put a tiny drop of water on either they both spread out and cover the bottom of the jar, when i put a line of paste it spreads out pretty well... but when i just put a think layer on with my finger on the cooler it has a couple of patches where it doesnt touch (could be the jar) but when i do it to the cpu it only touches at the outer edges.
shall i just go for the grain of rice technique?
shall i just go for the grain of rice technique?