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7950 Vapor X Voltage Locked? - Page 38

post #371 of 1046
11/11/12 at 12:18am
After bios upgrade 1175@1.150v and max 90C on Vrm1 / Fan Auto
It is max for my core, rising voltage to 1.2v and more doesn't help and still artifacting higher than 1175mhz.
Still don't understand why sapp7970 vapor-x with the same PCB comes with 1.2v and more and keeps vrm temperatures. Must be still bios issue with ours 7950. And on the other 7950 models (for example Gigabyte) people have 56-60C on vrm after pushing core to 1200+ mhz@1.2v
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post #372 of 1046
11/11/12 at 7:01am
Quote:
Originally Posted by adamlop View Post

After bios upgrade 1175@1.150v and max 90C on Vrm1 / Fan Auto
It is max for my core, rising voltage to 1.2v and more doesn't help and still artifacting higher than 1175mhz.
Still don't understand why sapp7970 vapor-x with the same PCB comes with 1.2v and more and keeps vrm temperatures. Must be still bios issue with ours 7950. And on the other 7950 models (for example Gigabyte) people have 56-60C on vrm after pushing core to 1200+ mhz@1.2v
I am starting to think that 7970 reports the temperatures differently. There could be some variation with the components used between 7950 cards. There are already at least 3 SKU's out from this card: 001SA, 201SA and just lately I saw 104SA on Guru3D forums (2x 8 pin power connector, hynix 1500MHz mem chips). There are also memory manufacturer and mem speed variance within each SKU. This is why the reported temperatures, gpu overclocking and specially memory overclocking results vary so much that they basically render all reviews of the cards meaningless. Its a lottery what you get and the results are all over.
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post #373 of 1046
11/11/12 at 8:51am
This two looks identical:
http://www.overclockersclub.com/reviews/sapphire_7950_vaporx/2.htm
http://www.overclockersclub.com/reviews/sapphire_hd7970_vaporx_ghz/2.htm
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post #374 of 1046
11/11/12 at 6:36pm
I cant remember the post, but someone replaced the thermal pads on their Sapphire 7950 OC and reduced VRM temps a couple degrees celcius. Probably really expensive pads, though.
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post #375 of 1046
11/12/12 at 2:59am
Quote:
Originally Posted by adamlop View Post

This two looks identical:
http://www.overclockersclub.com/reviews/sapphire_7950_vaporx/2.htm
http://www.overclockersclub.com/reviews/sapphire_hd7970_vaporx_ghz/2.htm
They should be identical, only the memory chips are different. But ofc now we know that Sapphire have made atleast 3 SKU's of the 7950 vapor-x so its highly likely that there are different (better and worse) thermal pads used, slightly different vrm components etc. which all contribute to the variance between the cards. For 7970 they likely keep the higher quality components for every card while 7950 becomes a coin toss.
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post #376 of 1046
11/13/12 at 1:20am
Quote:
Originally Posted by Derpinheimer View Post

I cant remember the post, but someone replaced the thermal pads on their Sapphire 7950 OC and reduced VRM temps a couple degrees celcius. Probably really expensive pads, though.

I did it on a Sapphire 950mhz edition and it worked out.

i used Fujipoly Extreme.

I used it with my water block and went with .5mm on ram and 1mm on the VRMs.


Photos.






Also used CL Liquid Pro on die.

Thread on it...
http://hardforum.com/showpost.php?p=1039315351&postcount=173


FrozenCPU sells the thermal pads. I bought the extreme: http://www.frozencpu.com/products/16882/thr-167/Fujipoly_Extreme_System_Builder_Thermal_Pad_-_60_x_50_x_05_-_Thermal_Conductivity_110_WmK.html?tl=g8c487s1294

I bought about $15 of it in 1mm and .5mm thickness and put it all over my mother board and video card and even on around the die of my delidded 3570k.


I see FrozenCPU now carries Ultra which is better. I will probably order some of it and try that out as well. biggrin.gif.
Edited by SonDa5 - 11/13/12 at 1:26am
B.K.T.
(22 items)
  		  
CPUMotherboardGraphicsRAM
De-Lidded direct die mount Intel i7-3770k No IHS MSI Z77 MPOWER Sapphire HD7950 OC 950mhz Edition Samsung Green MV-3V4G3D/US 8GB 2x4GB DDR3 1600MHZ 
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B.K.T.
(22 items)
  		  
CPUMotherboardGraphicsRAM
De-Lidded direct die mount Intel i7-3770k No IHS MSI Z77 MPOWER Sapphire HD7950 OC 950mhz Edition Samsung Green MV-3V4G3D/US 8GB 2x4GB DDR3 1600MHZ 
Hard DriveHard DriveHard DriveHard Drive
OCZ Agility 4 caviar black Hitachi OCZ AGILITY 3 
Optical DriveCoolingCoolingCooling
LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  Swiftech pump 655 
CoolingCoolingOSMonitor
Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit BenQ XL2410T 
KeyboardPowerCaseMouse
SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW SteelSeries Ikari Lazer 
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post #377 of 1046
11/13/12 at 7:19pm
Dang, that stuff is expensive :[

Cheaper to buy a pure copper heatsink and try to fit it onto the VRM.
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post #378 of 1046
11/13/12 at 7:23pm
Quote:
Originally Posted by Derpinheimer View Post

Dang, that stuff is expensive :[
Cheaper to buy a pure copper heatsink and try to fit it onto the VRM.

It's not a heat sink. It goes inbtween VRM/RAM/PCB/ ect and heat sink. Not to be confused with heat sink.


I got mine for around $15 and I have a bunch left over and covered all of my heat sinks on my MB, video card and even put some on the PCB around the die of my 3570k and I have enough left over to do it again later on. Really doesn't seem that expensive to me... It does take alot of time to install it though.
B.K.T.
(22 items)
  		  
CPUMotherboardGraphicsRAM
De-Lidded direct die mount Intel i7-3770k No IHS MSI Z77 MPOWER Sapphire HD7950 OC 950mhz Edition Samsung Green MV-3V4G3D/US 8GB 2x4GB DDR3 1600MHZ 
Hard DriveHard DriveHard DriveHard Drive
OCZ Agility 4 caviar black Hitachi OCZ AGILITY 3 
Optical DriveCoolingCoolingCooling
LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  Swiftech pump 655 
CoolingCoolingOSMonitor
Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit BenQ XL2410T 
KeyboardPowerCaseMouse
SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW SteelSeries Ikari Lazer 
Mouse PadAudio
SS Experience I-2, SS 9HD Audio Technica ATH-AD700 
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B.K.T.
(22 items)
  		  
CPUMotherboardGraphicsRAM
De-Lidded direct die mount Intel i7-3770k No IHS MSI Z77 MPOWER Sapphire HD7950 OC 950mhz Edition Samsung Green MV-3V4G3D/US 8GB 2x4GB DDR3 1600MHZ 
Hard DriveHard DriveHard DriveHard Drive
OCZ Agility 4 caviar black Hitachi OCZ AGILITY 3 
Optical DriveCoolingCoolingCooling
LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  Swiftech pump 655 
CoolingCoolingOSMonitor
Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit BenQ XL2410T 
KeyboardPowerCaseMouse
SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW SteelSeries Ikari Lazer 
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post #379 of 1046
11/14/12 at 11:11am
I know. its cheaper to just buy a heatsink and attach it than buy thermal tape.
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post #380 of 1046
11/14/12 at 12:38pm
Quote:
Originally Posted by Derpinheimer View Post

I know. its cheaper to just buy a heatsink and attach it than buy thermal tape.

The problem with that is that any heatsink is going to be limited by the TIM between it and the surface being cooled. For maximum performance you need to have a well designed heats sink/block with high quality TIM/Thermalpad.


Seems like either you value the cooling upgrades or don't. I'm very pleased with the $15 thermal pad upgrades I made to all of my RIGs hardware for $15. Totally worth the money to me.
B.K.T.
(22 items)
  		  
CPUMotherboardGraphicsRAM
De-Lidded direct die mount Intel i7-3770k No IHS MSI Z77 MPOWER Sapphire HD7950 OC 950mhz Edition Samsung Green MV-3V4G3D/US 8GB 2x4GB DDR3 1600MHZ 
Hard DriveHard DriveHard DriveHard Drive
OCZ Agility 4 caviar black Hitachi OCZ AGILITY 3 
Optical DriveCoolingCoolingCooling
LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  Swiftech pump 655 
CoolingCoolingOSMonitor
Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit BenQ XL2410T 
KeyboardPowerCaseMouse
SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW SteelSeries Ikari Lazer 
Mouse PadAudio
SS Experience I-2, SS 9HD Audio Technica ATH-AD700 
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  hide details  
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B.K.T.
(22 items)
  		  
CPUMotherboardGraphicsRAM
De-Lidded direct die mount Intel i7-3770k No IHS MSI Z77 MPOWER Sapphire HD7950 OC 950mhz Edition Samsung Green MV-3V4G3D/US 8GB 2x4GB DDR3 1600MHZ 
Hard DriveHard DriveHard DriveHard Drive
OCZ Agility 4 caviar black Hitachi OCZ AGILITY 3 
Optical DriveCoolingCoolingCooling
LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  Swiftech pump 655 
CoolingCoolingOSMonitor
Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit BenQ XL2410T 
KeyboardPowerCaseMouse
SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW SteelSeries Ikari Lazer 
Mouse PadAudio
SS Experience I-2, SS 9HD Audio Technica ATH-AD700 
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