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Cheap temperature 'insurance' for OC'ed SLI Asus Direct CU ii

post #1 of 20
Thread Starter 
Hello smile.gif

I was setting up the final OC values for my SLI Asus GTX 670 Direct CU iis and decided to try out the latest Precision-x software, complete with fan profiles suggested by the GTX 670 OC folks at overclock.net...thumb.gif

...however, after rebooting, I completely forgot to load said software correctly mad.gif ...I ran 3DMark11 and 3DMark Vantage in succession, then checked CPU Hardware info and noticed that the fan speeds were only at 10% max the whole time for either card - while card 1 had peaked at 67 C and card 2 at 54 C.

Fortunately, I had mounted a Noctua NF-P12 on the side of the Antec 302 case (PICS BELOW), and combined with the way the Sabertooth Z77 MB lines the cards up, the Noctua fan hits it perfectly.

I think this might work for others (even with different MB and GPU card combos). After kicking in Precision-X for another set of runs of 3Dmark benches this time with the fan profiles turned on, card 1 was at 59 C and card 2 at 44 C...

Noctua fans blowing directly onto the GPUs is a nice insurance ! biggrin.gif

Sorry for the quality of some of the pics - it is dark in there !

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;
Edited by Joa3d43 - 1/15/13 at 9:21pm
post #2 of 20
Quote:
Originally Posted by Joa3d43 View Post

Hello smile.gif

I was setting up the final OC values for my SLI Asus GTX 670 Direct CU iis and decided to try out the latest Precision-x software, complete with fan profiles suggested by the GTX 670 OC folks at overclock.net...thumb.gif

...however, after rebooting, I completely forgot to load said software correctly mad.gif ...I ran 3DMark11 and 3DMark Vantage in succession, then checked CPU Hardware info and noticed that the fan speeds were only at 10% max the whole time for either card - while card 1 had peaked at 67 C and card 2 at 54 C.

Fortunately, I had mounted a Noctua NF-P12 on the side of the Antec 302 case (PICS BELOW), and combined with the way the Sabertooth Z77 MB lines the cards up, the Noctua fan hits it perfectly.

I think this might work for others (even with different MB and GPU card combos). After kicking in Precision-X for another set of runs of 3Dmark benches this time with the fan profiles turned on, card 1 was at 59 C and card 2 at 44 C...

Noctua fans blowing directly onto the GPUs is a nice insurance ! biggrin.gif

Sorry for the quality of some of the pics - it is dark in there !
Warning: Spoiler! (Click to show)
Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;

Hey!

Just noticed your thread recently, and it seems you are getting good results using that fan indeed. I'm considering possibly doing some changes on my 600T setup in order to improve temps on my Asus 670's (my temps go up to about 72, which is okay, but what's the fun in settling for anything wink.gif). Since you are getting good results as it seems, I'd like to ask you some questions:
  • What are your results without the extra fan, but with the custom fan profile?
  • Could you make a picture of your custom fan profile?
  • Could you perhaps measure the results after about 30 minutes of looping in Heaven? The reason I'm asking this is because after 2 benchmark runs in 3DMark you might not have really maxed out your temperatures (I noticed myself that the heat build up can be rather slow, even though it eventually does).

I keep trying but I cannot really seem to improve the temperatures. Having a really steep fan curve doesn't make a whole lot of difference here compared to a relatively mild one; maybe 1 or 2 degrees.

It seems that when I improve airflow in some way (higher fan curve, extra fan somewhere in the case), temperatures rise more slowly, but in the end it cannot really prevent the build up of heat, except for shaving maybe 2 degrees of my max.

I also tried the following 'ghetto mod' to see what the results would be:



Yup, I mounted a fan to the H60 tubes. I know I'm not drawing any fresh air in this way, and it's a cheap fan, but I thought it might help in terms of blowing some heat away from the cards and directing the fresh air in the direction of the cards. No real significant difference, about 1-2 degrees again.

What I want to try in the future is maybe the following:
  • Install one of these brackets and mount a fan to it, but leaving the window on. This would be a preferred scenario if temps are good enough, because I'm really fond of the looks of my system the way it is.
  • Remove the window, put in the mesh, and put 4 fans on there. Only if all else fails.
  • If this still doesn't satisfy me, it might be time for a custom loop wink.gif

I just can't stand anything over 70 degrees on my GPU's tongue.gif, it's a psychological boundary for me I guess rolleyes.gif. Just need a few degrees off but it seems almost impossible.

(for your information, currently not listed in my sig: I've got 2 Bitfenix Spectre Pro's 120mm as top exhaust, and 1 200mm Bitfenix Spectre Pro as intake in the front. See my profile for some pics, the pics don't include these fans yet though)
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post #3 of 20
Thread Starter 
...well, I already changed things around again (new MoBo per Asus Maximus V Extreme, which changes the alignments of the SLI cards slightly), plus I added another 120mm Noctua fan per pics below (so now one from the side per above pics, and another one blowing length-wise).

...I find an aggressive fan profile does work better -your post mentioning 71 C suggests that one of your card started to 'throttle'. Also, I switched back from Precision-X to Asus GPU Tweak 2.2.9.9 because Precision-X - while easier to set up - would not affect voltage changes in the second Asus SLI card

...testing I do does take 'quite some time'...2 runs of 3Dm11, Vantage, Fur Mark, Unigen + 60 min on my favourite game that is the most GPU intensive (the latest NFS Most Wanted)...even then, GPU temps stay in the high 50s / low 60s, noting again that by 71 C, these cards will throttle.

...finally, I am about to add a custom water loop for the CPU first but once I have set that up to my liking, I will add the GPUs to the custom loop - just waiting to find out more about the new GTX Titans as I might switch (in which case I won't bother water cooling the current two GPUs)

Good luck with your setup !

Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;


Edited by Joa3d43 - 1/30/13 at 8:25pm
post #4 of 20
those temps weren't even that bad...
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post #5 of 20
Quote:
Originally Posted by Joa3d43 View Post

...well, I already changed things around again (new MoBo per Asus Maximus V Extreme, which changes the alignments of the SLI cards slightly), plus I added another 120mm Noctua fan per pics below (so now one from the side per above pics, and another one blowing length-wise).

...I find an aggressive fan profile does work better -your post mentioning 71 C suggests that one of your card started to 'throttle'. Also, I switched back from Precision-X to Asus GPU Tweak 2.2.9.9 because Precision-X - while easier to set up - would not affect voltage changes in the second Asus SLI card

...testing I do does take 'quite some time'...2 runs of 3Dm11, Vantage, Fur Mark, Unigen + 60 min on my favourite game that is the most GPU intensive (the latest NFS Most Wanted)...even then, GPU temps stay in the high 50s / low 60s, noting again that by 71 C, these cards will throttle.

...finally, I am about to add a custom water loop for the CPU first but once I have set that up to my liking, I will add the GPUs to the custom loop - just waiting to find out more about the new GTX Titans as I might switch (in which case I won't bother water cooling the current two GPUs)

Good luck with your setup !
Warning: Spoiler! (Click to show)
Intel(R) IPP JPEG encoder 7.0.1041 - Jul 19 2011;


Thanks for the reply! thumb.gif

I can imagine that with your new mobo temperatures aren't an issue at all anymore; I'd love to have 2 slots in between but it isn't meant to be with my Sabertooth Z77 I guess. I just love the look of this thing which is why I won't be changing it anytime soon. I added some pictures below, in case you'd like to have a peak. Anyway, nice one that mobo wink.gif.

Maybe I just haven't been aggressive enough with my fan profile, I'll try and mimic yours to see what happens. By the way, any particular reason you're using a step wise fan curve and not a 'smooth' one?

In terms of 'throttling' though, I know it should be there but I'm not noticing it at all. At 71 degrees I'm still seeing my (stock) speeds still go up to 1124 MHz when monitoring the OSD. So that is not particularly an issue here.

Your temp testing seems perfectly adequate by the way, thanks thumb.gif.

You could always consider going with universal blocks of course if you want to put your cards under water. Not as pretty as those full cover blocks of course, but still very effective and you can use them for several generations. I think I'd probably do this myself if I put them under water since then I could make a GPU change without much hassle.

I'll let you know as soon as I achieve some improvement.

Some pics as promised:



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post #6 of 20
Thread Starter 
...nice pics of a nice system ! thumb.gif

...re Sabertooth Z77, I really like that motherboard thumb.gif ...quite apart from its unique and clean looks...It is a great overclocker biggrin.gif with the right chip (Sabertooth hit 5.3 GHz), and its VRM is related to that of the Maximus Gene. My reasons for replacing it are simple:

1.) It was just being stress-tested 'to the max' before being installed in another IvyBridge system that has a semi-commercial role (24/7/365) as part of a Virtual Machine
2.) The Maximus V Extreme is set up for LN2 and such already re Bios, read-outs - not to mention allows for voltage mods of the video cards (+ Bios settings for that)

re. throttling around 70 C, have a look here (quote: "The first thermal throttle point is at 70C, then 80C, then 85C and lastly at 95C." Here's a graph for easy reference:) at this page http://www.overclock.net/t/1265110/the-gtx-670-overclocking-master-guide

...hope that helps ! smile.gif
post #7 of 20
Few things you need to do to the newer generation DCII cards.

1. Take off the heatsink and repaste with MX2 or MX4. Any decent low viscosity paste will do wonders for decreasing temps. I think I decreased mine by 5C by just changing the paste.
2. Remove the clear washers on the VRM heatsink. Unscrew the VRM heatsink and you will find when you take it off that there are 2 clear spacers where the screw holes are. Remove those bushings so you can tighten down the heatsink more to the VRM's. It should help cooling VRM's a little, more compressed thermal pad should grant better cooling.
3. Get new screws for the main heatsink. The stock screws have springs, and a built-in standoff. This isn't really that good and doesn't provide adequate pressure of the heatsink on the chip. Replacing the screws to get flush mount screws helps reduce temps more too!
Optional step and risky, 4. You can lapp the cooler. You have to take the standoffs off of the cooler but you can lapp it. I did on mine and I basically have a mirror finish on my direct heatpipe cooler. It's great! Provides the best cooling possible!


With my Single 670 overclocked I believe I was around 55C max on a custom fan profile....with the stock cooler....
post #8 of 20
Thread Starter 
...yup - almost redid them with MX-4 last weekend...but I have an order coming for 6 syringes of CoolLaboratory Pro / Ultra for 'other purposes' biggrin.gifwink.gif involving a soon-to-be-delidded CPU that in stock-trim (lid on with stock Intel TIM) does this http://valid.canardpc.com/show_oc.php?id=2673163

...as stated before, I may end up water-cooling the 670-SLI, or put GTX Titans in and use the 670ies in another system...either way, their thermal paste will also be replaced
post #9 of 20
Thanks for the reply again Joa3d43, very helpful. Btw, I tried basically an exact copy of your fan curve, but it yielded very little difference. Maybe 1C. But I'll just keep on trying, maybe Noctua will have to be my solution as well wink.gif.
Quote:
Originally Posted by Cakewalk_S View Post

1. Take off the heatsink and repaste with MX2 or MX4.

Did you use a dot in the middle or did you spread out the thermal paste? 5C seems like a lot, and I've got some MX-4 lying around. Been wanting to do this for a while now, but I always find these TIM jobs quite annoying wink.gif.

Btw: I definitely do not have any temperature concerns regarding the usage of a single card, they stay very cool individually. It's just that in SLI, the top card heats up a bit.
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post #10 of 20
Thread Starter 
Quote:
keesgelder wrote...I definitely do not have any temperature concerns regarding the usage of a single card, they stay very cool individually. It's just that in SLI, the top card heats up a bit.

By the looks of your pics, there seems to be enough space between the cards in your system...Noctua fans I use for this are definitely 'cool'

That said, in SLI, keep in mind that the stock settings of the NVidia driver will stress the 1st card more...there are custom setups available per game, and in NFS Most Wanted 2012, I force alternate frame rendering by card 2 - works great in that game, though not necessarily others...just try out different SLI profiles for your favourite games
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