- May 30, 2004
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I decided to try my hand at lapping a couple days ago after I saw horrible temps on my QX6700 with a decent watercooling setup. I was pretty nervous about lapping the most expensive chip I've ever owned but there are plenty of good guides online that simplified things a lot.
I also switched from a Swiftech MCW6002-64 waterblock to one of the new D-Tek Fuzions, so the temps aren't directly comparable but should be within a few degrees. Here are the initial results at stock speeds and volts:
With unlapped QX6700 and MCW6002 block
Idle 47-51C (temps varied a lot between cores)
Load (only one instance of Orthos for ~30sec) temps shot up to 90C very quickly
With lapped QX6700 and D-Tek Fuzion
Idle 30C
Load (two instance of Orthos running for 30min) 46C
I attribute 95% of the difference to the lapping. When I pulled off the MCW6002 there was only a very thin line of contact right along the edge of the chip. The IHS was horrible and was no where near flat. After lapping the contact was awesome. Almost the entire IHS made contact with the waterblock.
I don't recommend this for everyone (those who will be running at stock speeds and don't want to void the warranty), I just wanted to throw in my two bits about the effectiveness of lapping.
I also switched from a Swiftech MCW6002-64 waterblock to one of the new D-Tek Fuzions, so the temps aren't directly comparable but should be within a few degrees. Here are the initial results at stock speeds and volts:
With unlapped QX6700 and MCW6002 block
Idle 47-51C (temps varied a lot between cores)
Load (only one instance of Orthos for ~30sec) temps shot up to 90C very quickly
With lapped QX6700 and D-Tek Fuzion
Idle 30C
Load (two instance of Orthos running for 30min) 46C
I attribute 95% of the difference to the lapping. When I pulled off the MCW6002 there was only a very thin line of contact right along the edge of the chip. The IHS was horrible and was no where near flat. After lapping the contact was awesome. Almost the entire IHS made contact with the waterblock.
I don't recommend this for everyone (those who will be running at stock speeds and don't want to void the warranty), I just wanted to throw in my two bits about the effectiveness of lapping.