OK, I need some people with a bit more quad core experience than me. I am thinking that I may need to reseat and reapply the thermal paste as well since my IDLE temps are around 42C - 50C (42C on two cores and 50C on the other two) and my load temps shoot up to 55C - 62C (55C for two cores and 62C for the other main two cores). Keep in mind that this is on water cooling. Seems a bit high to me.

I know that the two main cores (which are on the same die) will be higher in temps since it is the mainly used die/cores. But 8 degrees difference at load?

EDIT // I just checked load temps with iTAT and it reported 71C and 67C for temps! IT HAS TO BE a bad seating...

What block?With my TDX there is a good 10C different with is mounted with the hoses vertically and horizontally, horizontally all the cores are with in a 1-2C difference. I have a TDX, BIP2, and a D5 pump, Load temps are 72ishC @ 1.47v @ 3.5Ghz. At stock my temps are about 60ishC at stock

Change the direction of it and check temps again.

Edit, Yea, I have my barbs are going left to right (horizontally) instead or up and down Vertically), if that helps.

Change direction? Huh? There are only two ways to mount the block... one way and they 180 degrees rotated. Either way the inlet barb hits the center of the CPUs die cover with the outlet offset to either side.

I mean like this,

instead of,

I hope this helps

Attached Thumbnails

   

Hmm, i don't think I have that option with the TDX top. It seems to only want to mount where the inlet is centered over the CPU.

While you are reseating the blck, have a close look at the IHS on the CPU - I've read a few reports of slightly concave or convex heatspreaders on some LGA775 CPU's

It may need lapping - hopefully not though

I remember thinking that it looked pretty concave when I was installing it. That may account for one side of the block getting better contact than the other.... *sigh* Looks like some lapping is in order... it just sucks that it will void the warranty when doing so.

iTAT, I did a quick search but I didn't see any temperature software. What temps are
you getting with Core Temp or Speedfan? I have a QX6700 and it runs hotter than most
Quads I've seen. But I'm only air cooling it (CoolerMaster Geminii) and my temps are
way cooler than yours at stock speeds. Plus I live in Florida and it's been Hotter than Hell
lately. What kind of Thermal Paste are you using? If your watercooling Artic Silver Ceramique
will probably work best.

Quote: Originally Posted by GlitterKill Hmm, i don't think I have that option with the TDX top. It seems to only want to mount where the inlet is centered over the CPU.

The inlet is centered in both picks.

The temps I listed are from CoreTemp. I used AS 5. I have some ceramique around here that I will reseat the CPU with. I guess I will lap the IHS as well.

Is this what you got GK?

The holes to mount it are in a square so it could be mounted two ways.

If your temps are off by 8d you probably will need to lap your cpu.
I bought mine from Cpt.Planet so it came pre-lapped. And my temps
are all 38-40 d at idle and 57-60d at load, on air, at stock speeds &
volts. Plus it's a QX6700 so your Q6600 should be a few degree's lower.
Actually I'd expect low 30's at idle and high 40's at load with H2O cooling.
What size radiator and reservior are you using? And what cfm are your fans?

ArticSilver5 is popular because it has good themal properties under high heat
conditions. Ceramique works better at the lower temps you should get with
water or any more extreme cooling solution. And for any Air coolers that read
this. I've recently tried out a new product from CooLaboratory that works
pretty damn good. Liquid Metal, it's giving me temps 2-3d lower than ArticSilver5.
Here's a link :-)
Coollaboratory Liquid PRO Thermal Interface Material - FrozenCPU.com

I'd say lapping is the thing to try , My Q6600 only differ's in temps about 1 to 3 dagree's Idle and loaded , using both speedfan and Coretemp ...... Tho on air they do seem to run hot upper 40s to low 50s ilde 60+ loaded to 70 if its a hot day

Quote: Originally Posted by Slaymate If your temps are off by 8d you probably will need to lap your cpu. I bought mine from Cpt.Planet so it came pre-lapped. And my temps are all 38-40 d at idle and 57-60d at load, on air, at stock speeds & volts. Plus it's a QX6700 so your Q6600 should be a few degree's lower. Actually I'd expect low 30's at idle and high 40's at load with H2O cooling. What size radiator and reservior are you using? And what cfm are your fans? ArticSilver5 is popular because it has good themal properties under high heat conditions. Ceramique works better at the lower temps you should get with water or any more extreme cooling solution. And for any Air coolers that read this. I've recently tried out a new product from CooLaboratory that works pretty damn good. Liquid Metal, it's giving me temps 2-3d lower than ArticSilver5. Here's a link :-) Coollaboratory Liquid PRO Thermal Interface Material - FrozenCPU.com

we did a review of that here at the apex, did we not.. (checking reviews in backround)

EDIT Found:
PCApex.com - Coollaboratory Liquid Metal

AS5 works best reall in all air situations, but one thing to keep in mind, a bare top CPU (non IHS Style) works best with nanotherm PCM + due to the bare core gets much hotter, and with nanotherm you have a liquidy type substance that turns waxy when heated and it sets in about 5 mins. I still use the small bottle I bought with my CNPS7000CU on my athlon XP era CPU's.

Ceremiqe is good for temps inbetween 20C and under these conroes and quads are staying awful hot though.

I've never heard of a thermal interface material's thermal resistance changing significantly for small temperature differences after it has set. Where did you get this info?

I'd say Ceramique has more tolerance for poor mounts and uneven surfaces, that's why I always use it on wonky video card chips. But unless you are seriously dropping the temp with phase change or chillers, and you have a good mount, Arctic Silver will outperform Ceramique in any situation over ambient....period. Believe me, I've run the data. I always tested with Ceramique before the introduction of Lumeire.

Check the pattern when you pull the block and it will tell the tale if it's a bad mount. Heavy on one side and light on the other. Or a lapping problem, heavy to the center or outer edges. You'd have to have a seriously screwed up IHS to have a 8 degree difference if flatness is the problem.

BTW, I tend to disagree with Arctic's instructions for applying AS5 on the Duo's. I go for the old fashioned thin layer over the whole thing approach rather than the spooge in the middle and hope for the best approach they recommend.

How does the block hang when not tightened down? Are the hoses pulling it off perpendicular?

I switched to Ceramique and remounted the block and my temps are now about 2 - 4 degrees better. That's a start. I think I am going to need to lap the CPU after all. *sigh* It sucks being a performance enthusiast.

Slaymate: I am using a Black Ice extreme Dual 120mm Rad. The fans are two Alphacool fans which feel as though they are very slow speed and tuned for low noise. I will probably try to swap these out for different fans. I bet that will net me a few more degrees.

BeetleMan: yes, that is the block I am using.