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[Official] AMD/ATI GPU Mod Club - AKA "The Red Mod" - Page 124

post #1231 of 3006
Quote:
Originally Posted by paleh0rse14 View Post

Alright, I wasn't quite happy with my VRM temps after doing the Red Mod to my cards, so I sat and stared at the case for a while... that's when my awesome Arc Midi R2 case came to the rescue!

There is a horizontal slot above all the other PCI slots, so I took a slot bracket and super-glued a Silent R2-series 140mm fan to it that is aimed directly down on the VRM heatsinks on each card.

The result:

AFTER RED MODDING BOTH GPU'S:
2 x Powercolor 7870XT Myst @ 1100/1500 after a Unigine Valley run, ambient temp is 21C:
GPU1: 42C Core, 86C VRM
GPU2: 42C Core, 89C VRM
CPU (Swiftech H220): 55C

AFTER RED MODDING BOTH GPU'S AND ADDING A 140MM FAN:
2 x Powercolor 7870XT Myst @ 1100/1500 after a Unigine Valley run, ambient temp is 22C:
GPU1: 43C Core, 75C VRM
GPU2: 43C Core, 77C VRM
CPU (Swiftech H220): 57C

So, while I'm still not 100% satisfied with the VRM temps, they're definitely better than they were before!
band.gif

Looks like this:
I tried the same thing only I used two 120's in that extra slot. While it certainly helped, I wasn't blown away with the temp drop on the VRM's. However, I haven't touched their heat sinks yet. I'll probably try that next.
post #1232 of 3006
Quote:
Originally Posted by Daddeo2 View Post

I tried the same thing only I used two 120's in that extra slot. While it certainly helped, I wasn't blown away with the temp drop on the VRM's. However, I haven't touched their heat sinks yet. I'll probably try that next.
Just reseating the stock heatsink with better TIM/pad will help a drop a few c. Also if its possible try to pressure mod the clips somehow or replace them with machine bolts since they usually barely have any mounting pressure.

I was surprised at how well the bottom portion of the stock cooler on my 7970 cools the VRMs. I know you can't do it on your cards that have the VRMs by the exhaust port, but I cut that part off to use under my TripT bracket and my VRMs are at 71/60c at full load 1150/1175. The 71c is the top one that I only have a super tiny finned heatsink on, will replace when I find a suitable one to cut up to fit. Card still running low volts though, 1.187 in Trixx and quite a bit less under load(surprising amount of vdroop on 79x0). I haven't had time to try to push it yet smile.gif
Behemoth
(25 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i7 4790K "Relidded" @ 5ghz <50c Asus Sabertooth Z97 MK1 Custom WC'd 7970 3GB @ 1100/1500 stock volts Custom WC'd 7970 3GB @ 1100/1500 stock volts 
RAMHard DriveCoolingCooling
2X4GB Patriot Viper Extreme 1TB Velociraptor 10k RPM w/ 64MB Cache Two Arqtik TEC Chillers in Series Archimedes TEC block w/TN660 TEC 
CoolingCoolingCoolingCooling
Two Ported/tapped MCP655 Pumps 2x Black Ice GTX 480 Gen2 Rads DD dual drive bay Res with LCD water temp monit... GPU Loop: Modded Enzotech Sapphire CPU blocks, ... 
CoolingOSOSMonitor
36x Globe 120mm 80cfm server fans Win 10 Pro Mint 15(KDE) 4K 28" Samsung U590D 
KeyboardPowerCaseMouse
Logitech G710+ Mechanical CM Silent Power M 1000watt Main, OCZ Z850W Slave Custom Mountain Mods Extended-Extended Ascension Logitech G502 Proteus 
Mouse PadAudioAudioAudio
Homemade 16ga 304 Stainless pad, Neoprene backed Aune T1 DAC Various Tubes: Mostly switching from 60's GE "S... AKG K7XX Headphones 
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Reply
Behemoth
(25 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i7 4790K "Relidded" @ 5ghz <50c Asus Sabertooth Z97 MK1 Custom WC'd 7970 3GB @ 1100/1500 stock volts Custom WC'd 7970 3GB @ 1100/1500 stock volts 
RAMHard DriveCoolingCooling
2X4GB Patriot Viper Extreme 1TB Velociraptor 10k RPM w/ 64MB Cache Two Arqtik TEC Chillers in Series Archimedes TEC block w/TN660 TEC 
CoolingCoolingCoolingCooling
Two Ported/tapped MCP655 Pumps 2x Black Ice GTX 480 Gen2 Rads DD dual drive bay Res with LCD water temp monit... GPU Loop: Modded Enzotech Sapphire CPU blocks, ... 
CoolingOSOSMonitor
36x Globe 120mm 80cfm server fans Win 10 Pro Mint 15(KDE) 4K 28" Samsung U590D 
KeyboardPowerCaseMouse
Logitech G710+ Mechanical CM Silent Power M 1000watt Main, OCZ Z850W Slave Custom Mountain Mods Extended-Extended Ascension Logitech G502 Proteus 
Mouse PadAudioAudioAudio
Homemade 16ga 304 Stainless pad, Neoprene backed Aune T1 DAC Various Tubes: Mostly switching from 60's GE "S... AKG K7XX Headphones 
  hide details  
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post #1233 of 3006
Quote:
Originally Posted by Puck View Post

Quote:
Originally Posted by Daddeo2 View Post

I tried the same thing only I used two 120's in that extra slot. While it certainly helped, I wasn't blown away with the temp drop on the VRM's. However, I haven't touched their heat sinks yet. I'll probably try that next.
Just reseating the stock heatsink with better TIM/pad will help a drop a few c. Also if its possible try to pressure mod the clips somehow or replace them with machine bolts since they usually barely have any mounting pressure.

I was surprised at how well the bottom portion of the stock cooler on my 7970 cools the VRMs. I know you can't do it on your cards that have the VRMs by the exhaust port, but I cut that part off to use under my TripT bracket and my VRMs are at 71/60c at full load 1150/1175. The 71c is the top one that I only have a super tiny finned heatsink on, will replace when I find a suitable one to cut up to fit. Card still running low volts though, 1.187 in Trixx and quite a bit less under load(surprising amount of vdroop on 79x0). I haven't had time to try to push it yet smile.gif
I wonder how well it might work to replace the stock VRM heatsinks altogether -- perhaps with a couple of Swiftech MC21 Mosfets that come with their own thermal tape? I'll have to measure it to figure out the proper length, and then maybe I'll pick up some more mosfets to test.

In the meantime, if anyone else finds a long, skinny heatsink that may work better, please share!!
post #1234 of 3006
Quote:
Originally Posted by Puck View Post

Just reseating the stock heatsink with better TIM/pad will help a drop a few c. Also if its possible try to pressure mod the clips somehow or replace them with machine bolts since they usually barely have any mounting pressure.

I was surprised at how well the bottom portion of the stock cooler on my 7970 cools the VRMs. I know you can't do it on your cards that have the VRMs by the exhaust port, but I cut that part off to use under my TripT bracket and my VRMs are at 71/60c at full load 1150/1175. The 71c is the top one that I only have a super tiny finned heatsink on, will replace when I find a suitable one to cut up to fit. Card still running low volts though, 1.187 in Trixx and quite a bit less under load(surprising amount of vdroop on 79x0). I haven't had time to try to push it yet smile.gif
Thanks for the input Puck. I'll probably work on those VRM's this weekend. By "pressure mod the clips" do you mean doing away with the OEM plastic clips w/ springs holding the heat sinks in place on the card and retrofitting new fasteners?
post #1235 of 3006
Quote:
Originally Posted by Daddeo2 View Post

Thanks for the input Puck. I'll probably work on those VRM's this weekend. By "pressure mod the clips" do you mean doing away with the OEM plastic clips w/ springs holding the heat sinks in place on the card and retrofitting new fasteners?
I'm pretty sure that's exactly what he meant. It may not be very difficult at all to switch to standard bolts/nuts, or something similar.
post #1236 of 3006
paleh0rse14, forgot to mention before but that's a nice, clean looking build.
This is probably a dumb question but here goes anyway. If by using the cards own fan header to control the fans cooling the VRM's, isn't one in fact adding to the very heat load in which one is trying to cool in the first place. I'm new to all this so I'm not sure if the VRM's provide power to the fan headers as well. If one were to get power for there fans from the power supply directly or a MOBO header, would that help with VRM temps?
post #1237 of 3006
Quote:
Originally Posted by Daddeo2 View Post

paleh0rse14, forgot to mention before but that's a nice, clean looking build.
This is probably a dumb question but here goes anyway. If by using the cards own fan header to control the fans cooling the VRM's, isn't one in fact adding to the very heat load in which one is trying to cool in the first place. I'm new to all this so I'm not sure if the VRM's provide power to the fan headers as well. If one were to get power for there fans from the power supply directly or a MOBO header, would that help with VRM temps?
You're probably correct that having fans connected to the GPUs may increase the load on the voltage regulation modules (VRM), but I've never tested that theory to know what difference (if any) there may be. It should be noted, though, that I only have one fan connected directly to each GPU -- the Gelid 120mm Slim Blue LED fans. All of my other fans are on different mobo headers and controllers.

The Gelids themselves also draw much less amperage than the stock GPU fans, so the voltage required to power them MAY be less than the power required to power the stock GPU fans. Then again, since they're controlled by PWM, and not voltage, the voltage allocated to the fans may stay constant, regardless of what type of fan is used. (I don't know)

If I have time this weekend, I'll test your theory by connecting them to my fan controller instead. Since I'm still searching for any possible ways to lower the VRM temps, I'll be very interested in the results, as well. My GUESS is that there will be little or no difference given that fan amperage is miniscule compared to the amperage required to power the card itself -- it's that quickly rising GPU amperage that really drives up the VRM temps.

Thanks for the idea and the compliment!
Edited by paleh0rse14 - 5/24/13 at 9:02am
post #1238 of 3006
Quote:
Originally Posted by paleh0rse14 View Post

You're probably correct that having fans connected to the GPUs may increase the load on the voltage regulation modules (VRM), but I've never tested that theory to know what difference (if any) there may be. It should be noted, though, that I only have one fan connected directly to each GPU -- the Gelid 120mm Slim Blue LED fans. All of my other fans are on different mobo headers and controllers. The Gelids themselves also draw much less amperage than the stock GPU fans, so the voltage required to power them MAY be less than the power required to power the stock GPU fans.

If I have time this weekend, I'll test your theory by connecting them to my fan controller instead. Since I'm still searching for any possible ways to lower the VRM temps, I'll be very interested in the results, as well! Thanks for the idea, and thanks for the compliment!
I think I'll give it a whirl too. I currently have my 120's on a mobo header but I haven't any other fans cooling the VRMs currently. No TripT bracket here, just zip ties at the moment. Funny thing is prior to me using the 120's in that extra slot, I actually tried using one of the card OEM fans with the shroud intact installed in that vertical slot blowing on the card,(I say "card" because I had only one installed in the system at that time). I had it plugged into the cards fan header using a custom profile and it seemed better with temps. Although its got higher rpms than the 120's I'm using now. Still, may have to go back and forth and do some testing. I maybe imagining it, its hell getting old. I've tried so many different things its hard to keep them straight. HaHa
post #1239 of 3006
Quote:
Originally Posted by Daddeo2 View Post

I've tried so many different things its hard to keep them straight. HaHa
I'd argue that all of this hacking helps keep us young, sane, and engaged! cheers.gif
post #1240 of 3006
Would a shim be needed for a 5870 or 6970 using a h60 bracket
Taking the card apart tonight and going to check the paste and put tape on the bracket to insulate it
The hdmi worked before but not now
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