Overclock.net › Forums › Cooling › Air Cooling › Triple crossfire - heat issues at full load
New Posts  All Forums:Forum Nav:

Triple crossfire - heat issues at full load

post #1 of 17
Thread Starter 
Hi guys,

I am running a triple crossfire setup with three Sapphire 5850 1GB Extreme edition but I am running into problems in terms of heat at full load (which is their primary use, will be folding/mining at 100% 24/7).


As the cards are not reference (they are the new, cheap $150 5850s), the fans don't exhaust the heat out of the system. Although, after further investigation it seems like all ATi cards that are not watercooled suffer from the same issue in a triple crossfire setup. At idle; my temps are as follows:

Top: 45C @ 39% Fan
Middle: 52C @ 50% Fan
Bottom (right above power supply which is acting as an exhaust): 42C @ 39% Fan speed

At load (100%):
Top: 81C @ 84% Fan speed
Middle: 88C @ 99% fan speed (and rising)
Bottom: 72C @ 64% fan speed

How it looks:



My case is an Antec 902 with an additional 120MM side intake case fan added (right above the GPUs). Every single fan is running at it's highest setting inside the case.


As I do not feel comfortable having my GPUs at 85-90C 24/7 with the fans at 80-100% power, what do you guys recommend I can do? Should I turn the side intake fan directly across from the GPUs into a exhaust? Should I add another 120MM fan in my hard drive bay? If I ever want to OC the cards, do I have any options besides opting for watercooling?


Thanks in advance.
post #2 of 17
In this case stock reference version cards do much better as they exhaust the heat out the rear. I would personally turn the side panel into an exhaust fan, and get a fan with lots of static pressure so that it can move all the air around it. If you can add any other fans, the more airflow the better.

Unfortunately cooling that doesn't exhaust heat, the heat sits around the cards and tends to build up. Running modern day GPU's at 85 - 90 is what they are meant to do, they can tolerate the heat. I would say set the fan profiles on all cards to 100% if you don't care about the noise.

Good luck, and welcome to OCN!
The Laptop
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 2860QM AMD Radeon HD 6770M Corsair Vengence 1600MHz Samsung 840 Pro 256GB 
OSMonitor
Mac OS X 10.8 1680 x 1050 anti-glare high resolution  
  hide details  
Reply
The Laptop
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 2860QM AMD Radeon HD 6770M Corsair Vengence 1600MHz Samsung 840 Pro 256GB 
OSMonitor
Mac OS X 10.8 1680 x 1050 anti-glare high resolution  
  hide details  
Reply
post #3 of 17
Thread Starter 
Quote:
Originally Posted by appleg33k85 View Post
In this case stock reference version cards do much better as they exhaust the heat out the rear. I would personally turn the side panel into an exhaust fan, and get a fan with lots of static pressure so that it can move all the air around it. If you can add any other fans, the more airflow the better.

Unfortunately cooling that doesn't exhaust heat, the heat sits around the cards and tends to build up. Running modern day GPU's at 85 - 90 is what they are meant to do, they can tolerate the heat. I would say set the fan profiles on all cards to 100% if you don't care about the noise.

Good luck, and welcome to OCN!
Thanks for the welcome and the advice! Any good fan you might recommend for moving the heat (I prefer Noctua due to the low noise)? I am thinking of strapping an additional 120MM on the back of these cards and adding a more powerful side mount fan.
post #4 of 17
Noctua's are good fans, silent but there are fans that push a lot more air out there...heat is always a problem with crossfire/trifire setups...the only solution would be to put them under water
FuG 16 Z
(14 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 ASUS P6X58D-E 2x MSI 6970 Lightning  6GB DD3 Dominator 1600 MHz 
Hard DriveOSMonitorPower
3x 1TB F3s [RAID 0] + Crucial M4 64GB Windows 7 25" LG M2550D Seasonic X850 
CaseMouseMouse PadAudio
Silverstone FT02 Rat 7 Mionix Propus 380 Swans M10s 
  hide details  
Reply
FuG 16 Z
(14 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 ASUS P6X58D-E 2x MSI 6970 Lightning  6GB DD3 Dominator 1600 MHz 
Hard DriveOSMonitorPower
3x 1TB F3s [RAID 0] + Crucial M4 64GB Windows 7 25" LG M2550D Seasonic X850 
CaseMouseMouse PadAudio
Silverstone FT02 Rat 7 Mionix Propus 380 Swans M10s 
  hide details  
Reply
post #5 of 17
Thread Starter 
Quote:
Originally Posted by Komder View Post
Noctua's are good fans, silent but there are fans that push a lot more air out there...heat is always a problem with crossfire/trifire setups...the only solution would be to put them under water
How about these, 110CFM:

http://ncix.com/products/?sku=26749&...facture=Scythe

Watercooling would be nice but I don't think it is worth the investment on 5850s and my i7 920 is plenty cool with the Noctua NH12P cooler I have on it. If I could watercool only my 5850s for under 100, I would jump on that but I don't think an option like that exists.


I am going to go take some mock picture setup for you guys on my proposed airflow plan. Be right back.
post #6 of 17
replace the tim with IC Diamond or similar.
    
CPUMotherboardGraphicsRAM
i5 2500k ASUS P8Z68-V LX Intel 3000 G-Skill Sniper 
Hard DriveCoolingOSMonitor
Intel 320 Series SSD Stock Intel HSF , 2 Antec 100 stock fans, 2 ult... Windows 7 64 Bit Professional Samsung Syncmaster B2430 
KeyboardPowerCaseMouse
Logitech Illuminated Corsair CX430 V2 Antec 100 Logitech Dinovo 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5 2500k ASUS P8Z68-V LX Intel 3000 G-Skill Sniper 
Hard DriveCoolingOSMonitor
Intel 320 Series SSD Stock Intel HSF , 2 Antec 100 stock fans, 2 ult... Windows 7 64 Bit Professional Samsung Syncmaster B2430 
KeyboardPowerCaseMouse
Logitech Illuminated Corsair CX430 V2 Antec 100 Logitech Dinovo 
  hide details  
Reply
post #7 of 17
I can't open the link...scythe are good brand though, however more cfm almost always means more noise and as DSF_x said you can always replace tim with some higher quality to knock a few deg off.
FuG 16 Z
(14 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 ASUS P6X58D-E 2x MSI 6970 Lightning  6GB DD3 Dominator 1600 MHz 
Hard DriveOSMonitorPower
3x 1TB F3s [RAID 0] + Crucial M4 64GB Windows 7 25" LG M2550D Seasonic X850 
CaseMouseMouse PadAudio
Silverstone FT02 Rat 7 Mionix Propus 380 Swans M10s 
  hide details  
Reply
FuG 16 Z
(14 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 ASUS P6X58D-E 2x MSI 6970 Lightning  6GB DD3 Dominator 1600 MHz 
Hard DriveOSMonitorPower
3x 1TB F3s [RAID 0] + Crucial M4 64GB Windows 7 25" LG M2550D Seasonic X850 
CaseMouseMouse PadAudio
Silverstone FT02 Rat 7 Mionix Propus 380 Swans M10s 
  hide details  
Reply
post #8 of 17
I would say try this:
turn exhaust fan to intake fan and side fan as exhaust as well
these 2 fans should move air around GPUs a little bit
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k@4500Mhz asus sabertooth p67 rev 3.0 asus 570 directCU II 8GB DDR3 G skill sniper series 
Hard DriveOSMonitorPower
samsung 1TB, WD 640 green win 7 64bit samsung xl2370 seasonic x650 gold 
CaseMouseMouse Pad
Silverstone Raven 2 evolution Cyborg R.A.T 5 Roccat TAITO 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k@4500Mhz asus sabertooth p67 rev 3.0 asus 570 directCU II 8GB DDR3 G skill sniper series 
Hard DriveOSMonitorPower
samsung 1TB, WD 640 green win 7 64bit samsung xl2370 seasonic x650 gold 
CaseMouseMouse Pad
Silverstone Raven 2 evolution Cyborg R.A.T 5 Roccat TAITO 
  hide details  
Reply
post #9 of 17
Quote:
Originally Posted by appleg33k85 View Post
In this case stock reference version cards do much better as they exhaust the heat out the rear. I would personally turn the side panel into an exhaust fan, and get a fan with lots of static pressure so that it can move all the air around it. If you can add any other fans, the more airflow the better.

Unfortunately cooling that doesn't exhaust heat, the heat sits around the cards and tends to build up. Running modern day GPU's at 85 - 90 is what they are meant to do, they can tolerate the heat. I would say set the fan profiles on all cards to 100% if you don't care about the noise.

Good luck, and welcome to OCN!
I would think Intake would be better on the sidepannel...I would mod the side pannel to run 2 120mm fans side by side.

Quote:
Originally Posted by DSF_x View Post
replace the tim with IC Diamond or similar.
Do this aswell, ICD is my fave paste.

Also, dont wast time with the Slip Stream fans...If you want static pressure you want San Ace 1011's its 120x38mm, the extra width allows the fan blade's to have a more aggresive pitch creating more static pressure than a 120x25mm fan cam. If 38mm fan wont fit or its just to loud, I would look at AP-30's.Any time fans that move more than 80CFM and are 120mm or small I strongly suggest getting a fan controller.
Gizmoto
(18 items)
 
They beat me:(
(15 items)
 
Home Server V1.0
(17 items)
 
CPUMotherboardGraphicsRAM
AMD Phenom II x6 1040t @2.7Ghz ASRock 880GM-LE FX  AMD Radeon HD 4250 integrated graphics Micro Center(ADATA) 8Gb (2x4) 1333 
Hard DriveHard DriveHard DriveHard Drive
Western Digital Caviar Blue 640Gb Samsung SpinPoint F4 2Tb Seagate Barracuda 7200.9 ST3500641AS-RK 500Gb Seagate Barracuda 7200.9 ST3500641AS-RK 500Gb 
Optical DriveOptical DriveCoolingOS
ASUS 24X DVD Burner ASUS 24X DVD Burner Stock AMD Cooler Windows 7 Home Premium 64 bit 
OSOSPowerCase
Linux Mint (VM) Linux Ubuntu (VM) Inland ILG-500R2 500w PSU DiabloTek Evo Mid-tower Case 
Other
Inland IL internal card reader 
  hide details  
Reply
Gizmoto
(18 items)
 
They beat me:(
(15 items)
 
Home Server V1.0
(17 items)
 
CPUMotherboardGraphicsRAM
AMD Phenom II x6 1040t @2.7Ghz ASRock 880GM-LE FX  AMD Radeon HD 4250 integrated graphics Micro Center(ADATA) 8Gb (2x4) 1333 
Hard DriveHard DriveHard DriveHard Drive
Western Digital Caviar Blue 640Gb Samsung SpinPoint F4 2Tb Seagate Barracuda 7200.9 ST3500641AS-RK 500Gb Seagate Barracuda 7200.9 ST3500641AS-RK 500Gb 
Optical DriveOptical DriveCoolingOS
ASUS 24X DVD Burner ASUS 24X DVD Burner Stock AMD Cooler Windows 7 Home Premium 64 bit 
OSOSPowerCase
Linux Mint (VM) Linux Ubuntu (VM) Inland ILG-500R2 500w PSU DiabloTek Evo Mid-tower Case 
Other
Inland IL internal card reader 
  hide details  
Reply
post #10 of 17
Thread Starter 
Thanks for the input guys, I appreciate it. I decided to just put a household fan with the side panel off to cool the cards right now. Here is the new full load temps:

Top: 83C @ 89% Fan (Slight OC to 825Mhz and downclock Memory to 975)
Middle: 81C @ 90% Fan (Stock)
Bottom (right above power supply which is acting as an exhaust): 64C @ 80% Fan speed (Slight OC to 850Mhz)

^ Fairly decent improvment over stock. The only other thing I have is a Cooler Master 120MM fan (the one that was my intake) acting as an intake directly over the back of the video cards.

Do you guys think these temps are alright for 24/7/365 operation? In any case, here is my new plan of attack (I also want to avoid modding my Antec 902 if possible) to try and cool these cards with the side panel ON:

1. Replace TIM with ICD 24K on all GPUs
2. Move my empty hard drive bay up one slot so it is exactly level with the three graphic cards and add this fan at the end of the bay as an intake:
http://ncix.com/products/?sku=38379&...facture=Noctua
^It moves 100CFM of air and is quiet (I love Noctua too, lol) so I am sold on it.
3. Place this fan directly ontop of the video card array so hot air does not settle around the video cards:
http://ncix.com/products/?sku=45800&...facture=Noctua
^110CFM
4. Another Noctua NF-S12B-FLX as an intake on the side panel
5. Laying my Cooler Master 120MM on the bottom of the case as an exhaust


All of this while the side panel is ON. Do you guys think this is going to get me similar temperatures to my current open case setup with the household fan on?

I am also wondering if a Noctua fan that is sitting in the intake bay pulling in 100CFM worth of air while the Antec fan at the front of the case can only pull in 39-50 CFM may be a waste. But I think the fact that the heat is being moved around should help out. Also, since the side panel is only pulling in 100CFM of air and can only accomodate a 120MM fan (I already have issues fitting it with my Noctua CPU cooler), will having the 140MM fan sitting ontop of the video card array help? I may try removing the plastic piece on the side panel of the Antec 902 and try placing the 140MM there instead.

Thanks again guys!
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Air Cooling
Overclock.net › Forums › Cooling › Air Cooling › Triple crossfire - heat issues at full load