Factory direct flat IHS vs Concave\Convex (+lapping) temps on C2D

[aggybong]

To those of you with Concave\Convex IHS', what kind of temps are you seeing?

To those of you who have lapped your Concave\Convex IHS', what kind of temprature drops have you seen?

To those of you who received a flat IHS from Intel, what kind of temps are you seeing?

I have an extremely concave IHS (http://img526.imageshack.us/my.php?image=img1521rn5.jpg), and my temps are hitting 70-73c at load even with an Ultra-120. I'm debating whether to RMA it to Intel (has anybody done this?), lap it, or sell it and try my luck with another. Right now I'm hitting 68c (load) at stock settings, which seems excessive. I can overclock to 3Ghz with 1.3vcore and see the temps hit 70c.

[pcdoc1]

What kind of temperature drops have you seen? I've done some searching and results are limited, but lapping only seems to get you 5-8c cooler, which would still put most people at extremely high temps.

I have an extremely concave IHS (http://img526.imageshack.us/my.php?i...mg1521rn5.jpg), and my temps are hitting 70-73c at load even with an Ultra-120. I'm debating whether to RMA it to Intel (has anybody done this?), lap it, or sell it and try my luck with another.

Why the new thread, the conversation is going right below your post. http://www.xtremesystems.org/forums/...d.php?t=114114

[Silver Bullet]

RMA .. the chip is pretty much unusable ...

[linflas]

That was how my e6600 lived as well, lapped it got a nice drop, about 5-8C as you said

[aggybong]

Why the new thread, the conversation is going right below your post. http://www.xtremesystems.org/forums/...d.php?t=114114

It's not really the same conversation. This topic is meant to be more of a poll. I do wish I could add an official poll, but it won't let me edit that

[aggybong]

Changed the thread a little.

[AndrewZorn]

RMA or call intel and try to break them a deal... ask them if you can lap it and keep your warranty (haha, yeah right, RMA...)

[Brahmzy]

Those temps are AWFULLY high for an Ultra-120. Like 20C-25C too high.

[aggybong]

If you look at the picture you'll understand why

[AndrewZorn]

what i dont understand:
you put a blob in the middle right
then you push down and tighten heatsink
there is TIM on the edges but not in the middle
this seems impossible to me, no matter how concave... how can TIM be pressed to the edges if it isnt touching the middle?

[aggybong]

I wish I knew

[AndrewZorn]

did you tighten, or place?

did you have a blob in the middle, or prespread?

[yury2808]

..To those of you who received a flat IHS from Intel, what kind of temps are you seeing?...

it seems that my 6300 is pretty flat, but at 2.8Ghz (400x7) it is around 41-43C idle, and up to 64C in burn (dual prime).

gonna polish it soon, I guess. just curious will it help or not.

[mackanz]

Have the exakt same issue with 2 6700 week 27 from the same batch here. Hitting 65c loaded temps with a nice Dangerden block. 5c more with a Big Typhoon and a deltalike fan. Reseated the thing many times. This is at 1.5 vcore and 3.3 ghz. I have a 6600 that doesn't reach 55c at 1.65 vcore and 3.4 ghz on the same water setup. I have some enormous marks on the IHS too. Radiator doesn't even get mildly warm. The only thing i am scared of is if you lap it, what if it is the contact between the core and the IHS itself? THen you have voided the warranty for close to nothing.

[heikis]

what i dont understand:
you put a blob in the middle right
then you push down and tighten heatsink
there is TIM on the edges but not in the middle
this seems impossible to me, no matter how concave... how can TIM be pressed to the edges if it isnt touching the middle?

he probably just covered the IHS with a thin layer of thermal paste and you can see on the picture where it touched the heatsink

[[timko]]

Is that some generic TIM? I had some once that went a bit watery. Get some AS5 instead.

[Fred_Pohl]

Lol!

[remorema]

mine was hitting 74º with a Big typhoon.

now running @ stock cooler & hitting 60º

the only explanation i could get for this is: the sock cooler has a round bottom that doensn't touch the edges of the IHS.

so propably it sinks in the concave area, and that is the only reason i could imagine for my stock cooler getting better temps than a BT , a Mine , & a NInja plus.

yes i tried all those air cooler's.

running and stock cooler now & soon to be WC.

i'll defenetly going to lap my IHS before mounting the WC. otherwise I it the risk that getting better tenos with stock cooler than with WC.

[Fred_Pohl]

That certainly defies logic. I'm running a Ninja+ (unlapped) on an unlapped IHS with a properly applied layer of AS Ceramique and my dual prime load temp is <50C when OC'd to 3GHz.

[remorema]

That certainly defies logic. I'm running a Ninja+ (unlapped) on an unlapped IHS with a properly applied layer of AS Ceramique and my dual prime load temp is <50C when OC'd to 3GHz.

I was using AS5 during my tests.

[mesyn191]

I was using AS5 during my tests.

Shouldn't make a difference.

[remorema]

Shouldn't make a difference.

the greatest difference should be the ambient temp.

my room during the afternoon gets +30/35º

[mesyn191]

Yes, ambient case temps do indeed matter more than the thermal paste.

[aggybong]

Is that some generic TIM? I had some once that went a bit watery. Get some AS5 instead.

It's AS Ceramique. Very goopy.
And I'll agree that the stock Intel heatsink is slightly convex, and doesn't even touch the corners of the chip when mounted. It would certainly explain the temps.

[Fred_Pohl]

Unfortunately I don't have immediate access to any advanced flatness measuring tools but I have a friend who is a machinist and I'm going to see if he can measure the flatness of a C2D IHS for me. All I have handy is a brand new razor blade to use as a straight edge and a new E6400. The IHS certainly appears flat to me using this razor blade as a flatness guage.