HD4870x2 too high temps under H2O

[Asta]

hi

I am not happy with my temps because I have max temp around 44/90° (idle/load) at VDDC Phase #1 of HD4870x2 with the case opened and fans at around 1700 rpm.

This is according to CPU-Z.

My loop is 3/8" with water coming from res to pump and then to the rad , next to vga block and cpu block, fans are pulling air from rad to inside of the case.

I got some suggestions that maybe an air plug exist inside a vga block but then how to get rid of it?

I have no visible bubbles in loop and hot air is coming from rad so it looks good.

Any coments?

WOuld it be better with some other fan-rad-air direction combination or by placing rad on a different place - maybe even out od a case?

Pics:

 

[tinytomlogan]

First things first is to make sure that you move the whole case about to see if you have a massive air lock, do this by having the pump running and moving either the case or the radiator as thats probably it. If not make sure the pump is being powered by 12v, after that its asking about did you change the thermal paste ect.

None of the question in the poll will drop temps by more than a degree or two so its deffo a problem elsewhere

 

[VonBlade]

That's definitely wrong. My ASUS Tri-Fan X2 is 35 idle, 72 max load.

 

[lasher]

So your blowing hot air taken from the card right back onto it?

I know it's not uncommon for these to reach 90 degrees on air, and some of the drivers can give some odd temp results.

 

[walkingasd]

i'm not an expert but try starting by inverting the fans of the rad (so they push out) if you get the same temps, try having the rad outside of the case (or just start with this).

i MIGHT be wrong but it looks like your running the loop: GC->CPU->pump->rad

if it IS so try going: pump->CPU->GC->rad

if push comes to shove and your temps are still the same, try running only the GC on the rad...if your temps are STILL the same clean out the block

 

[tinytomlogan]

i'm not an expert but try starting by inverting the fans of the rad (so they push out) if you get the same temps, try having the rad outside of the case (or just start with this).

i MIGHT be wrong but it looks like your running the loop: GC->CPU->pump->rad

if it IS so try going: pump->CPU->GC->rad

if push comes to shove and your temps are still the same, try running only the GC on the rad...if your temps are STILL the same clean out the block

Its none of that the temps are too high. I garanty its air in the rad or thermal paste

 

[Asta]

I'll try to run a pump only and to move the case in all directions to let air out but I think I have already done that pretty good at first place.

I must admit I don't understand how can thermal paste be a problem when I have high temps at VDDC and there is no thermal paste but thermal pads only. Maybe I am wrong but thats according a vga water block manual and I thhink it's the same for other manufacturers.

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[invisibleninja06]

there should be thermal paste to contact the actual main chip, haven't seen water block that use thermal pads to contact the gpu but im no WC expert either.

 

[cl0ck_ed]

What are the other temps of the card? Such as core 1/2 temps? Is it just the vddc phase one that is the problem? The phases on these cards do get very hot. Is it in proper contact with the water block?

 

[WelshD1K]

somethign isnt right mine never goes over 50

 

[Asta]

somethign isnt right mine never goes over 50

Is that for VDDC or GPU ?

 

[Asta]

there should be thermal paste to contact the actual main chip, haven't seen water block that use thermal pads to contact the gpu but im no WC expert either.

Yes but we are talking about VDDC - power supply chip. I have a thermal paste on the GPUs.

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[Asta]

What are the other temps of the card? Such as core 1/2 temps? Is it just the vddc phase one that is the problem? The phases on these cards do get very hot. Is it in proper contact with the water block?

Does anybody knows a good method to check a proper contact with such a big water block?

tnx

 

[WelshD1K]

my card with GPu-z

idle

VDC phase 1 34 degree

VDC phase 2 34 degree

VDC phase 3 34 degree

goes to 36-37 in game

 

[WelshD1K]

and my actual card is running every temp below 40 after 1hr on MW2 but it does have a tripple thermochill to itself

 

[tinytomlogan]

and my actual card is running every temp below 40 after 1hr on MW2 but it does have a tripple thermochill to itself

Its cool cos it got built properly

 

[cl0ck_ed]

IIRC it is just your VDDC that is getting very hot. Therefore this has led me to believe that your water block isn't fitted properly. The çheck is the temps that are read in gpu-z, but think there is another check. I think you will have to get some new thermal pads, make sure that they are the correct thickness and reinstall the water block. I'm sure Tom from TTLC will be able to help you out.

 

[Asta]

IIRC it is just your VDDC that is getting very hot. Therefore this has led me to believe that your water block isn't fitted properly. The çheck is the temps that are read in gpu-z, but think there is another check. I think you will have to get some new thermal pads, make sure that they are the correct thickness and reinstall the water block. I'm sure Tom from TTLC will be able to help you out.

Thermal pads were new from a manufacturer of the water block and I put them according to the manual.

Yesterday I deassambled my water loop and vga with water block. According to the thermal pads condition, I can tell that a lower side near power connectors have had much more flat thermal pads then other side.

I assume that side was more tightened than other. However VDDC #1 #2 and #3 temps were more or less equal under load and idle on all three VDDCs before.

However I cleaned GPUs and put new thermal paste on it, cleaned water block and assamble all together again.

I'll see how it works when I got time to connect the water loop again in few days.

I'll let you know.

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[tinytomlogan]

Can you show me a link to the GPU and the waterblock that you have please dude.

Do you have a camera that can take a decent macro of the side of the card?

 

[Asta]

Can you show me a link to the GPU and the waterblock that you have please dude.

Do you have a camera that can take a decent macro of the side of the card?

Hi,

It's an Aquagratix HD4870x2 GPU water block.

http://www.hardwareoverclock.com/Aquacomputer_Aquagratix_ATI_HD4870X2.htm

or translated to english:

http://translate.google.hr/translat...ter_Aquagratix_ATI_HD4870X2-3.htm&sl=de&tl=en

Here si a link for manual: http://www.2shared.com/file/12151928/82f3794d/4870X2_EN.html

I'll take a photo when I got home in 4-5 hours from now and put a link here.