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Cooling dual 8800 GTX's?

post #1 of 16
Thread Starter 
Hi all, first post to Overclock.net -- hope this is the right forum for this topic.

I am having a heat issue since adding a 2nd 8800 GTX card to my system -- hoping to get some advice from the experts. Symptoms include freeze-ups, BSoDs, and lower frame rates during gaming (primarily CoD4) after about 30-60 minutes of play. GPU core temps seem to be around 88 to 101 when this happens, as best I can tell. I'm using HWMonitor and GPU-Z to monitor temps. I'm pretty sure these are heat issues, because if I leave the side panel off the case, I don't see these issues.

I have a Gigabyte 3D Aurora 570 case, which I generally like, but I think this case is contributing to my excessive heat issues. Here is a photo of my SLI setup:



I think the heat issues are due to a few factors:
- the 8800 GTX is a beast when it comes to heat
- installing a 2 slot graphics card in the bottom PCI-E slot doesn't leave much room for air intake / output for the card (maybe an inch), and there is very little air movement at the bottom of the case due to the next point
- the 120mm intake fan on the 570 does not move enough air because it is blocked by the front panel and the sideways-mounted drive cage.

This leaves a lot of heat and very little airflow at the bottom of the case. I've taken several steps to try to alleviate this:
- replaced the stock Gigabyte fan with a Scythe S-Flex 64 cfm / 1600 rpm fan
- removed the air filter on the intake fan assembly (it was the plastic kind, very restrictive)
- attached an 80mm fan to the outside of the drive cage to help draw air into the area and blow directly across the bottom card.
- added a Silverstone 3x 5.25 drive bay 120mm fan (this has helped my CPU temps but doesn't do much for the GPUs)
- added a PCI slot cooler fan below the top card

Here is a photo of the intake fan area, showing the drive cage blockage and 80mm fan added:



These efforts seem to have helped a little, but I'm still experiencing the problems noted above.

Have I missed anything obvious here? Here's what I'm thinking for next steps:
1. remove GPU shrouds, clean off stock thermal paste, and apply the correct amount of Arctic Silver 5 (is there a tutorial for this on the site somewhere?)
2. buy a new case with better airflow. Aside from taking a dremmel to it, I don't see any way to increase airflow in the 570.
3. buy aftermarket cooling for the GPUs. Somewhat reluctant to do this since I do eventually plan to water cool and don't want to waste money, but I'm not ready for that yet and need a short-term solution.
4. replace the side window of my case with the supplied mesh cover. Also reluctant to do this since it already sounds like I'm sitting next to a jet engine (plus I don't like the way it looks)

At the moment I am leaning towards 1 and 2: 1 because there is no cost, and 2 because I really think my case setup is the main source of the issue. I've been looking at the following case options: Cooler Master Cosmos S, Antec 900, and NZXT Tempest. I like the idea of a bottom-mounted PSU, and the top-mounted fans. I'd like to have a window if possible, as aesthetics are important to me as well.

Any ideas or suggestions? Apologies for the extra long post. TIA.
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AquaAnima
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post #2 of 16
When i had GTX's in SLI it was a problem also, what makes the largest difference is increasing the fan speed on the cards using Rivatuner 2.09.
 
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X79 Build
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CPUMotherboardGraphicsRAM
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Corsair H105 (Push/Pull) Windows 10 Pro x64 2x 27" Asus PG278Q ROG Swift 144hz  Corsair AX1500i Digital ATX 80 Plus Titanium 
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Lian Li PC-O8WX ATX Cube Case Logitech Z906 5.1 Surround 
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2x 256GB OCZ Vertex 4's (RAID-0) 2x 2TB Seagate Barracuda 7200.14 64MB Cache Pioneer BDR-207DBK Blu-ray Writer Corsair H105 (Push/Pull) 
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post #3 of 16
Thread Starter 
Thanks Mhill, forgot to mention that I'm using Rivatuner to keep my fans at 100% all the time. That did make a big difference --dropped my idle temps about 5-8C.
AquaAnima
(19 items)
 
  
CPUMotherboardGraphicsRAM
i7 3820 ASUS Sabertooth X79 EVGA GTX 1070 FTW 24 GB G.Skill Ripjaws Z DDR3 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro 256 GB SSD WD Vraptor 600 GB WD Black 5TB ASUS Lightscribe 
CoolingOSMonitorMonitor
Swiftech H220X AIO Win7 Pro x64 ASUS PG278Q ROG Swift 27" GSync Dell 2407 
MonitorKeyboardPowerCase
Dell U2412M Corsair K95 RGB Corsair AX1200i Corsair Carbide 500R 
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Corsair M65 Pro Razer Scarab Schiit Magni + Modi2 
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AquaAnima
(19 items)
 
  
CPUMotherboardGraphicsRAM
i7 3820 ASUS Sabertooth X79 EVGA GTX 1070 FTW 24 GB G.Skill Ripjaws Z DDR3 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro 256 GB SSD WD Vraptor 600 GB WD Black 5TB ASUS Lightscribe 
CoolingOSMonitorMonitor
Swiftech H220X AIO Win7 Pro x64 ASUS PG278Q ROG Swift 27" GSync Dell 2407 
MonitorKeyboardPowerCase
Dell U2412M Corsair K95 RGB Corsair AX1200i Corsair Carbide 500R 
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post #4 of 16
Quote:
Originally Posted by Phoebus View Post
Thanks Mhill, forgot to mention that I'm using Rivatuner to keep my fans at 100% all the time. That did make a big difference --dropped my idle temps about 5-8C.
I was going to suggest 2x 80mm or 120mm fans on the side panel, then realised your side panel has no fans. That's a bit of a bummer.

Your side panel isn't helping dude, you need some fans on that. But that would require some modding.
Edited by Mhill2029 - 5/31/08 at 10:53pm
 
X79 Build
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CPUMotherboardGraphicsRAM
Intel Core i7-6950X @ 4.0Ghz Asus Rampage V Extreme [Bios:3101] 2x EVGA GeForce Titan X SC Editions in SLI 32GB (4×8) Corsair Dominator Platinums (3000Mhz) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 950 Pro 512GB M.2 Nvme 2x 256GB Vertex 4 SSD (RAID-0) 2x 2TB Seagate Barracuda [Storage] Pioneer BDR-207DBK Blu-ray Writer 
CoolingOSMonitorPower
Corsair H105 (Push/Pull) Windows 10 Pro x64 2x 27" Asus PG278Q ROG Swift 144hz  Corsair AX1500i Digital ATX 80 Plus Titanium 
CaseAudio
Lian Li PC-O8WX ATX Cube Case Logitech Z906 5.1 Surround 
CPUMotherboardGraphicsRAM
i7-3930K (C2) @ (4.6Ghz) Asus Rampage IV Extreme X79 (Bios 3204) 3x EVGA GTX780Ti's SC Editions 32GB (4x8GB) G-Skill TridentX 2400Mhz 
Hard DriveHard DriveOptical DriveCooling
2x 256GB OCZ Vertex 4's (RAID-0) 2x 2TB Seagate Barracuda 7200.14 64MB Cache Pioneer BDR-207DBK Blu-ray Writer Corsair H105 (Push/Pull) 
OSMonitorPowerCase
Win7 Pro 64Bit & Win10 Pro 64Bit Asus ROG Swift (2560x1440 @144hz) Corsair AX1200 + Corsair RED sleeved cables Coolermaster Cosmos II Ultra 
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X79 Build
(13 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-6950X @ 4.0Ghz Asus Rampage V Extreme [Bios:3101] 2x EVGA GeForce Titan X SC Editions in SLI 32GB (4×8) Corsair Dominator Platinums (3000Mhz) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 950 Pro 512GB M.2 Nvme 2x 256GB Vertex 4 SSD (RAID-0) 2x 2TB Seagate Barracuda [Storage] Pioneer BDR-207DBK Blu-ray Writer 
CoolingOSMonitorPower
Corsair H105 (Push/Pull) Windows 10 Pro x64 2x 27" Asus PG278Q ROG Swift 144hz  Corsair AX1500i Digital ATX 80 Plus Titanium 
CaseAudio
Lian Li PC-O8WX ATX Cube Case Logitech Z906 5.1 Surround 
CPUMotherboardGraphicsRAM
i7-3930K (C2) @ (4.6Ghz) Asus Rampage IV Extreme X79 (Bios 3204) 3x EVGA GTX780Ti's SC Editions 32GB (4x8GB) G-Skill TridentX 2400Mhz 
Hard DriveHard DriveOptical DriveCooling
2x 256GB OCZ Vertex 4's (RAID-0) 2x 2TB Seagate Barracuda 7200.14 64MB Cache Pioneer BDR-207DBK Blu-ray Writer Corsair H105 (Push/Pull) 
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post #5 of 16
Thread Starter 
Yeah, that's one reason I'm considering a new case -- with a side fan. Any suggestions on a case? I would like something roomy (used to a full tower), preferably with a window and a bottom-mounted PSU.
AquaAnima
(19 items)
 
  
CPUMotherboardGraphicsRAM
i7 3820 ASUS Sabertooth X79 EVGA GTX 1070 FTW 24 GB G.Skill Ripjaws Z DDR3 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro 256 GB SSD WD Vraptor 600 GB WD Black 5TB ASUS Lightscribe 
CoolingOSMonitorMonitor
Swiftech H220X AIO Win7 Pro x64 ASUS PG278Q ROG Swift 27" GSync Dell 2407 
MonitorKeyboardPowerCase
Dell U2412M Corsair K95 RGB Corsair AX1200i Corsair Carbide 500R 
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AquaAnima
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i7 3820 ASUS Sabertooth X79 EVGA GTX 1070 FTW 24 GB G.Skill Ripjaws Z DDR3 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro 256 GB SSD WD Vraptor 600 GB WD Black 5TB ASUS Lightscribe 
CoolingOSMonitorMonitor
Swiftech H220X AIO Win7 Pro x64 ASUS PG278Q ROG Swift 27" GSync Dell 2407 
MonitorKeyboardPowerCase
Dell U2412M Corsair K95 RGB Corsair AX1200i Corsair Carbide 500R 
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post #6 of 16
you can do a pretty easy mod like what i did:

after my zalman mod on my 9800GTX, it had idled around 40-42C. But after installing two fans out of my junk bin, my temps stay 33-34C.

EDIT: jesus christ, I just noticed how warped my card is!
Edited by //.DK - 5/31/08 at 11:06pm
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PILLS HERE!!!!!!
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post #7 of 16
http://www.newegg.com/Product/Produc...82E16811129025

you may want to take off the plastic covering on your 8800s and a intel stock fan fits on there with its clamps
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post #8 of 16
Here is what I did with my pair of 8800gtx

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Murder Box II
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Sandisk Extreme Pro 480GB Corsair H100i V2 - w/ML120 Pro Fans Windows 10 Home 64 Bit Acer Z35P 1440P G-Sync 
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Intel G3440 Asus B85M-E/CSM EVGA GTX 950 Patriot Viper 3 - 2x8GB 1600hz 
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Samsung EVO 850 - 500GB + 4TB/3TB x 2/2TB WD Green LG CH12LS28 Bluray Scythe Big Shuriken 2 w/Corsair SP120 Fan Windows 10 64 Bit 
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post #9 of 16
Thread Starter 
Robilar, do you have that fan blowing ON to the cards or drawing air FROM them? I could try this easily, as I have the extra 120mm Gigabyte fan that I replaced with the Scythe.
AquaAnima
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i7 3820 ASUS Sabertooth X79 EVGA GTX 1070 FTW 24 GB G.Skill Ripjaws Z DDR3 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro 256 GB SSD WD Vraptor 600 GB WD Black 5TB ASUS Lightscribe 
CoolingOSMonitorMonitor
Swiftech H220X AIO Win7 Pro x64 ASUS PG278Q ROG Swift 27" GSync Dell 2407 
MonitorKeyboardPowerCase
Dell U2412M Corsair K95 RGB Corsair AX1200i Corsair Carbide 500R 
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AquaAnima
(19 items)
 
  
CPUMotherboardGraphicsRAM
i7 3820 ASUS Sabertooth X79 EVGA GTX 1070 FTW 24 GB G.Skill Ripjaws Z DDR3 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro 256 GB SSD WD Vraptor 600 GB WD Black 5TB ASUS Lightscribe 
CoolingOSMonitorMonitor
Swiftech H220X AIO Win7 Pro x64 ASUS PG278Q ROG Swift 27" GSync Dell 2407 
MonitorKeyboardPowerCase
Dell U2412M Corsair K95 RGB Corsair AX1200i Corsair Carbide 500R 
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Corsair M65 Pro Razer Scarab Schiit Magni + Modi2 
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post #10 of 16
I don't have any issues with stock cooling on my GTS's. Antec 1200 case.
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My System
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