I am starting to get really frustrated with watercooling at the moment.
I have just setup my system for the 3rd time in as many weeks after draining and cleaning my whole loop and adding a new rad but my temps still are exactly the same using core temp as they were before.
I am running a 6600 @3.6 with 1.43 on the V-core. but no matter what I try the temps just seem high to me (43/41 idle 60/60 load orthos) This is on a lapped cpu under a dtek fuzion cpu waterblock with a 8800gtx EK block (so both low flow) a laing D4 pump and a thermochill pa 120.3 using 6 yate-loons in a push/pull config all at 12 volts.
Cpu is using AS5 and the room is quite cool I am not that bothered by the idle temps but the load temps concern me as the jump of 20 degrees is quite a lot and something that I think the rad and block should be able to handle.
So my question is does anyone have any tips or anything obvious I might be missing here.
The only thought I had was that the 680i chipset gets quite hot and the default fan/ heatsink that I am using blows the air directly onto the cpu block would it be worth trying to figure out a way to change the orientation of the fan or should this not matter due to the cpu using water rather than air to cool it?.
I just cannot get the temps down at load and it is getting really frustrating
I opened and cleaned out all the blocks and the rad last night (8 hour vinegar soak on the rad and dismantle and clean all the blocks/pump and changed tubing refilled using a mix of distilled water +5% pentosin 11 and a few drops of iodine) so it is a totaly clean and fresh setup)
I just cannot believe that a pa 120.3 and d-tek cannot beat a thermaltake setup which was running on narrow pipes using 3 120mm thermaltake fans
I know its only a minute or so - its just to show roughly what temps & delta I get with the same cpu and cooling. It should also be noted that its difficult to compare temps due to different ambients.
Heres my only ideas :
1. Mount - I know you have mounted it 3 times already but did you mount in the same way? Heres how I mounted mine: CPU - lapped, D-tek standard(unlapped). Shin-etsu thermal interface (shouldn't make too much of a difference using as5) spread across the cpu thinly with a razorblade which had previously been cleaned thoroughly as had the cpu. Place the d-tek on the cpu and give it a little twist no more than a few degrees. DO NOT SECOND GUESS YOURSELF - what I mean is don't check your mount once its made contact with the paste-trust yourself! Once mounted tighten the thumbscrews down so they are just resting on the springs - no pressure whatsoever. Then, in a cross(X) formation, screw each thumbscrew 1 turn at a time alternatively until you have it as tight as they will go with fingers alone. It may also be worth it to get a backplate if you find your motherboard is warping.
2. You made a bad job of the lap - did you check it with a grid?
3. Slight kink in your tubing or other restriction giving very poor flow to the d-tek.
4. Theres an air pocket in your rad - are you sure its been bled properly.
Worthy of note:
Every cpu is different m8. I have had 3 different E6600's now and all displayed different temps with the same settings and cooling. Looks like you may just be unlucky and have a hot one if none of the above apply.
Thanks w3bbo once again you have been a great help
at least I have an idea of a rough figure to aim for now.
Looks like I am going to have to pull it apart and relap the cpu again just to be sure.
I am 100% certain there is no air in the system as I had it upside down in shook and tilted it like crazy last night so there should be no probs there It also took just under 2 litres to fill so it's def. full.
I think it might just be a bad lap or really bad contact with the IHS and core on the CPU
Just did a quick test and it looks like its def. the CPU ( I monitored the temps on the GPU and ran orthos and the cpu shot up to 60 degrees immediately and the GPU did not budge in temp @ 49 degrees surely if the water was being heated to that extent after running over the cpu it would raise the GPU by a degree or so after a five minutes or is that just nonsense)
It dosn't quite work like that m8. I wont go to far into fluid dynamics and heat transfer(coz I'll only confuse myself lol) but the water passing over the cpu does not get heated up to such an extent that it will drastically effect the GPU or what ever is next in line - a few degrees at most is to be expected.
It deffo looks like the cpu (or possibly the D-tek) thats at fault. Normally I wouldn't advise lapping the base of waterblocks as they are usually in tip-top condition and the same flatness cannot be achieved by hand lapping. There have however been rumours that the D-tek fuzion is actually slightly bowed(convex) to counter the concave IHS of C2D. Mine definately isn't but some of the latter revisons may well be (in competiton to the bowed Apogee GT mod perhaps?). Might be worth investigating and rectifying.
The pump aint the best but it is easily enough for your loop so I really don't think it's that. If you are getting turbulance in your reservoir then it is pumping fine.
Iirc the C2D throttle back at 85c so you are well within the limits. I personally wouldn't want it to reach anywhere near 85c though, 65-70c would be my max and even then I wouldn't want it to be like that 24/7. Remember that although your temps aint the best under 100% load there will be very few programs that will put your cpu under that kind of pressure or for that long.
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using 3 120mm thermaltake fans
