XSPC Rasa 750 RS360

[Av8tortoo]

Yesterday my XSPC Rasa 750 RS360 kit finally came in after being backordered.

I have a question or two about WC, my first adventure into the area, ((getting my feet wet so to speak)(god I hope not)).

Here was my normal start temp using the stock Intel air cooler.



Then a short Prime95 run.



Everything looks fine, but the one core that is almost 9C lower than the other cores.

The XSPC rasa 750 RS360 was installed last night, if you want head over to the Build Log to see my post there, about my new system and how the build is progressing.

After the water kit was installed these are starting temps.



And then another short Prime95 run.



Again there is the 10C difference between the hotest and coolest core.

So finally to my questions:

Is that normal for there to be ~10C diffences between the highest and lowest cores?

Could the termal paste not be spread correctly? I used the "rice" size in the center of the chip when I applied the paste.

This weekend or sooner, I'll be starting to over clock the system, but because this is my first adventure into water cooling I wanted to make and get reassurances that things are working correctly before I nuke something.

 

[dugdiamond]

i personally....

plaster the chip with thermal paste (NOT the heatsink block) - with a whole tube of the stuff.

loosely tighten the heatsink.

then thrash the system until it gets nice n warm (makes the paste more pliable)

then tighten up the screws on the heatsink (correctly = diagonally)

the excess paste oozes out, which i clean away with cotton buds

 

[megamindstorm101]

What i do with thermal paste is apply a small pea size dot in the middle of the cpu and then i put my finger in a ziplock bag and i spread it out nice and even all the way to the edges and try to keep it as even as possible then I just shove the cpu cooler on and screw it tight, nothing comes oozing out and it gets the whole block. Make sure the layer is nice and thin.

 

[SieB]

Best method is the one you are already using, a small amount in the middle of the CPU, then letting the heatsink, water block spread it for you.

I wouldn't worry about it tbh if it's cooler it's not doing any harm, one of my cores on my 2500k is the opposite and runs up to 7c hotter than the others, I have reseated my heatsink and reapplied the thermal paste a few time but it's still the same, just the way it is unfortunately.

You could try reapplying the thermal paste and reseating the water block but if it is still 9c cooler it's just the way it is as well.

 

[ahboyhan]

Agree with SieB.

A small amount in the middle of the CPU, and let the heatsink, water block spread it for you.

off topic - why aren't you going for fully custom water cooling build when you already spend so much on that 990x.

 

[Firat]

Does anyone know if the 360 rad in this kit could possible fit in the BitFenix Collossus ?

 

[Aurus_OC]

Does anyone know if the 360 rad in this kit could possible fit in the BitFenix Collossus ?

No, at least mine only has holes and room for two 120s.

 

[tinytomlogan]

i personally....

plaster the chip with thermal paste (NOT the heatsink block) - with a whole tube of the stuff.

loosely tighten the heatsink.

then thrash the system until it gets nice n warm (makes the paste more pliable)

then tighten up the screws on the heatsink (correctly = diagonally)

the excess paste oozes out, which i clean away with cotton buds

Dear god you should be ashamed of yourself.

You just need a blob in the middle the size of a pea and then let the block do the rest. You may need a couple of mounts with a water block to narrow the difference between the cores.

Just take off the block, clean the paste, re-apply and then remount the block making sure the screws are done up in oposites and evenly.

Does anyone know if the 360 rad in this kit could possible fit in the BitFenix Collossus ?

240 only in that case.

 

[dugdiamond]

lol (at myself)

 

[dugdiamond]

lol (at myself)

but - this is the way i way taught, and then it was the way i taught others in college.

reason:

the chances of placing two flat surfaces against each other, with ONE SINGLE POINT OF CONTACT are very slim. it gets even worse when these surfaces are squeezing (sandwiching) another medium. the thermal paste (sandwich filling) will always try to find the easiest way out.

placing the blob in the middle, and then placing the heatsink upon the chip, with one (or two) corners touching first will squeeze the paste from the center to the widest gap. leaving the part of the surface where to the first point of contact was made with little or no paste.

but, each to their own, i suppose

 

[tinytomlogan]

I must mount a heatsink at least 5 times a week, too much paste is just as bad as not enough

That and its a complete arse to clean loads off before re-applying (as you should do everytime to take the heatsink off)

 

[Firat]

Ohwell a 240 rad will have to do then :/

 

[dugdiamond]

I must mount a heatsink at least 5 times a week, too much paste is just as bad as not enough

That and its a complete arse to clean loads off before re-applying (as you should do everytime to take the heatsink off)

fair comment, if like yourself and others who change there chips/heatsinks more times more times than i have a heated meal - but if you are only going to mount once........

 

[tinytomlogan]

fair comment, if like yourself and others who change there chips/heatsinks more times more times than i have a heated meal - but if you are only going to mount once........

do it properly 1st time.

 

[SieB]

fair comment, if like yourself and others who change there chips/heatsinks more times more times than i have a heated meal - but if you are only going to mount once........

Too much thermal paste will give you higher temps, the goal of using it is to break that metal on metal contact to get lower temps. You only need a rice grain sized amount in the center of the CPU, the heatsink will spread it across the surface area where the heatsink touches the CPU, you don't even need to cover the whole CPU just the part in-between the heatsink and the CPU