Overclock.net › Forums › Graphics Cards › AMD/ATI › [Official] Polaris Owners Club
New Posts  All Forums:Forum Nav:

[Official] Polaris Owners Club - Page 212

post #2111 of 4139
The problem with the Nitro cooler is that due to the closed nature of it on top and bottom, it traps heat inside. This is the worst situation to be in for VRM as their temperature just builds up over time. Because I have been in a similar situation in the past (where the cooler was not the problem, but the very small mATX case with minimal airflow) I would bet that running a looping benchmark and watching VRM temps realtime you will see them rise in temp fast up to a point (let's say 70c for example) and then just when you thought that it stabilized you will see it keep rising slowly up to 20c more over time....
That's typical behaviour of trapped residual heat.

Unfortunately the sapphire engineers went for looks over substance
post #2112 of 4139
AFAIK after Sapphire removed one of the phases from Nitro+ their and MSI Gaming X current capability is roughly the same. The difference is like 8 amps, although I don't remember if both of them are rated at 100C or whether one of them at 80C, and the other at 100C.
Roided midgit
(10 items)
 
Midgit
(12 items)
 
 
CPUMotherboardGraphicsRAM
3770k Asus P8Z77I-Deluxe MSI Radeon RX 480 GAMING X Crucial Ballistix XT 
Hard DriveCoolingCoolingCooling
Crucial M500 Noctua NH-D14 Noctua NF-F12 PWM Noctua NF-F12 PWM 
CoolingCoolingPowerCase
Noctua NF-B9 PWM Noctua NF-B9 PWM Corsair SF600 Fractal Node 304 
  hide details  
Reply
Roided midgit
(10 items)
 
Midgit
(12 items)
 
 
CPUMotherboardGraphicsRAM
3770k Asus P8Z77I-Deluxe MSI Radeon RX 480 GAMING X Crucial Ballistix XT 
Hard DriveCoolingCoolingCooling
Crucial M500 Noctua NH-D14 Noctua NF-F12 PWM Noctua NF-F12 PWM 
CoolingCoolingPowerCase
Noctua NF-B9 PWM Noctua NF-B9 PWM Corsair SF600 Fractal Node 304 
  hide details  
Reply
post #2113 of 4139
Quote:
Originally Posted by Blinky7 View Post

The problem with the Nitro cooler is that due to the closed nature of it on top and bottom, it traps heat inside. This is the worst situation to be in for VRM as their temperature just builds up over time. Because I have been in a similar situation in the past (where the cooler was not the problem, but the very small mATX case with minimal airflow) I would bet that running a looping benchmark and watching VRM temps realtime you will see them rise in temp fast up to a point (let's say 70c for example) and then just when you thought that it stabilized you will see it keep rising slowly up to 20c more over time....
That's typical behaviour of trapped residual heat.

Unfortunately the sapphire engineers went for looks over substance
Do you think that removing the shroud from Nitro+ and replacing the fans with two 92*25mm or two 120*25mm would improve those temperatures by a significant margin? Are there any tests? To me it just looks like the fin stack itself is kind of small.
Edited by Loladinas - 10/27/16 at 4:41am
Roided midgit
(10 items)
 
Midgit
(12 items)
 
 
CPUMotherboardGraphicsRAM
3770k Asus P8Z77I-Deluxe MSI Radeon RX 480 GAMING X Crucial Ballistix XT 
Hard DriveCoolingCoolingCooling
Crucial M500 Noctua NH-D14 Noctua NF-F12 PWM Noctua NF-F12 PWM 
CoolingCoolingPowerCase
Noctua NF-B9 PWM Noctua NF-B9 PWM Corsair SF600 Fractal Node 304 
  hide details  
Reply
Roided midgit
(10 items)
 
Midgit
(12 items)
 
 
CPUMotherboardGraphicsRAM
3770k Asus P8Z77I-Deluxe MSI Radeon RX 480 GAMING X Crucial Ballistix XT 
Hard DriveCoolingCoolingCooling
Crucial M500 Noctua NH-D14 Noctua NF-F12 PWM Noctua NF-F12 PWM 
CoolingCoolingPowerCase
Noctua NF-B9 PWM Noctua NF-B9 PWM Corsair SF600 Fractal Node 304 
  hide details  
Reply
post #2114 of 4139
Quote:
Originally Posted by Loladinas View Post

Do you think that removing the shroud from Nitro+ and replacing the fans with two 92*25mm or two 120*25mm would improve those temperatures by a significant margin? Are there any tests? To me it just looks like the fin stack itself is kind of small.

I would bet that the situation would be improved. Now if the improvement would be small or huge that's another matter as we don't know 100% all the variables and how much they contribute to the problem.

However I consider this solution unsatisfactory especially if it involves losing the card warranty (don't know if you can remove the shroud without hacking it and without touching any warranty stickers/leavind traces)
post #2115 of 4139
I see a few misconceptions about the NITRO model.

1. NITRO RX cooling issues come from an insufficient heatsink for the TDP demands of Polaris when oced. The heatsink is designed to cool at stock settings, but starts to lack coloing performance once you push the gpu further.

2. It's cooling solution is designed to expel the hot air through the sides and the back (the top hole in the pcb), not the bottom and the top of the shroud. Removing the shroud would probably improve airflow around the gpu, but it could also mean higher temps as the air isn't so focused to go though the heatsink. Moreover, having a front fan blowing air towards one of the back gpu exhaust isn't a good idea. The same can be said if the cpu cooler is moving air parallel to gpu pcb or is one of those blowing air onto the motherboard.
A weaker but better thought system airflow can make a gpu cooling design to work better than a more powerful one that's not tuned for it.

3. Sapphire uses high-low integrated MOSFETs for the NITROS that have a steady output current capability of 40A, meaning that even at 125ºC each phase is still able to throw 40A. The 470 NITRO has 4 phases, so a max of 160A and the 480 5 phases, 200A Even at +100ºC range, the VRM is capable to manage the same current output.
post #2116 of 4139
I have a question for those of you who have easy access to their cards.
What is the length of the PCB, or for those with the EK waterblock, the full card with waterblock?
I've been trying to find out all afternoon, and all I've gotten is Reddit threads speculating the length of the PCB.
The Regulator
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 5930K MSI X99S SLI Plus MSI GeForce GTX 780Ti G.Skill Ripjaws 4 16GB 
Hard DriveCoolingOSMonitor
Crucial MX100 Corsair Hydro Series H105 Windows 10 Pro 64 bit AOC i2369Vm 
KeyboardPowerCaseMouse
Ducky Shine 3 DK9087 Cherry MX Blue White LED EVGA SuperNOVA 1300 G2 Corsair Graphite 230T Logitech G600 
AudioAudio
Labtec Arena 485 2.1 Beyerdynamic DT 990 Pro 
  hide details  
Reply
The Regulator
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 5930K MSI X99S SLI Plus MSI GeForce GTX 780Ti G.Skill Ripjaws 4 16GB 
Hard DriveCoolingOSMonitor
Crucial MX100 Corsair Hydro Series H105 Windows 10 Pro 64 bit AOC i2369Vm 
KeyboardPowerCaseMouse
Ducky Shine 3 DK9087 Cherry MX Blue White LED EVGA SuperNOVA 1300 G2 Corsair Graphite 230T Logitech G600 
AudioAudio
Labtec Arena 485 2.1 Beyerdynamic DT 990 Pro 
  hide details  
Reply
post #2117 of 4139
The PCb on my reference card is exactly 7"
Edited by kittysox - 10/27/16 at 8:03am
post #2118 of 4139
Quote:
Originally Posted by Loladinas View Post

AFAIK after Sapphire removed one of the phases from Nitro+ their and MSI Gaming X current capability is roughly the same. The difference is like 8 amps, although I don't remember if both of them are rated at 100C or whether one of them at 80C, and the other at 100C.

I'm pretty sure you are correct. I remember reading and watching videos on the 470/480. Mosfets are pretty heavy duty, and theyr'e fairly capable. I'm adding a second intake fan up front (where my 5.25" bays are towards the top) to hopefully even out my airflow, after that if my VRM temps are still pretty high, then I'll have to deal with it till I'm ready to attempt to dissasemble my card and check the TIM and other thermal pads. It just seems like I have a lot higher of VRM 1 temps than most people do. And I'm not even overclocking it. yet.
    
CPUMotherboardGraphicsRAM
AMD A10-6800k Gigabyte F2A85X-UP4 Sapphire RX470 Nitro+ 8Gb G.Skill Ripjaws DDR3 1600 
Hard DriveHard DriveOptical DriveCooling
WDC WD50 00AAKS-65A7B0 Toshiba p300 3tb  LG super-multi drive  Cooler Master Hyper 212 Evo  
OSMonitorMonitorKeyboard
Windows 7 Custom 40" Toshiba LED 1080p TV - 40L310U 5" HDMI LCD touchscreen (originally intended to... Corsair Strafe RGB Cherry MX Silent 
PowerCaseMouseMouse Pad
Corsair CX550M  DIY PC Zetta-Bk Corsair M65 Pro RGB Corsair M300 Extended 
AudioOther
Bluedio T2s Bluetooth Stereo Headset Corsair AF120 White LED fans 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD A10-6800k Gigabyte F2A85X-UP4 Sapphire RX470 Nitro+ 8Gb G.Skill Ripjaws DDR3 1600 
Hard DriveHard DriveOptical DriveCooling
WDC WD50 00AAKS-65A7B0 Toshiba p300 3tb  LG super-multi drive  Cooler Master Hyper 212 Evo  
OSMonitorMonitorKeyboard
Windows 7 Custom 40" Toshiba LED 1080p TV - 40L310U 5" HDMI LCD touchscreen (originally intended to... Corsair Strafe RGB Cherry MX Silent 
PowerCaseMouseMouse Pad
Corsair CX550M  DIY PC Zetta-Bk Corsair M65 Pro RGB Corsair M300 Extended 
AudioOther
Bluedio T2s Bluetooth Stereo Headset Corsair AF120 White LED fans 
  hide details  
Reply
post #2119 of 4139
Ok, let's dive into uncharted waters now.

Looking for a layout chart of reference 470/480 PCB and cooler.

I'm wondering if I can mod a reference GTX 9800 cooler to fit on my 470. Hell of a lot of copper and heatpipes on that bastard, shame to throw it away.
My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
OSMonitorKeyboardPower
Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
CaseMouse
DeLUX Logitech 
  hide details  
Reply
My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
OSMonitorKeyboardPower
Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
CaseMouse
DeLUX Logitech 
  hide details  
Reply
post #2120 of 4139
I derped and accidentally closed HWiNFO before taking the screenshot, so the timer on it only shows 6 minutes. This is actually about an hour long session. VRM1 had previously gone up to 62C at its highest. Warning: Spoiler! (Click to show)
another screenie after another hour (well, nearly) Warning: Spoiler! (Click to show)
And this is the picture of my setup, to illustrate the airflow. Warning: Spoiler! (Click to show)

Edited by Loladinas - 10/27/16 at 2:21pm
Roided midgit
(10 items)
 
Midgit
(12 items)
 
 
CPUMotherboardGraphicsRAM
3770k Asus P8Z77I-Deluxe MSI Radeon RX 480 GAMING X Crucial Ballistix XT 
Hard DriveCoolingCoolingCooling
Crucial M500 Noctua NH-D14 Noctua NF-F12 PWM Noctua NF-F12 PWM 
CoolingCoolingPowerCase
Noctua NF-B9 PWM Noctua NF-B9 PWM Corsair SF600 Fractal Node 304 
  hide details  
Reply
Roided midgit
(10 items)
 
Midgit
(12 items)
 
 
CPUMotherboardGraphicsRAM
3770k Asus P8Z77I-Deluxe MSI Radeon RX 480 GAMING X Crucial Ballistix XT 
Hard DriveCoolingCoolingCooling
Crucial M500 Noctua NH-D14 Noctua NF-F12 PWM Noctua NF-F12 PWM 
CoolingCoolingPowerCase
Noctua NF-B9 PWM Noctua NF-B9 PWM Corsair SF600 Fractal Node 304 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD/ATI
Overclock.net › Forums › Graphics Cards › AMD/ATI › [Official] Polaris Owners Club