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HD7950 revised with reference HD7970 PCB club - Page 29

post #281 of 847
Quote:
Originally Posted by SonDa5 View Post

vrm 1 doesnt have heat sink. Needs a heat sink with thermal pad not thermal paste. Not Looks like reference hd 7970 cb but not sure if compatible with hd 7970 water blocks. compare to my photo.
Where could i get some small heatsinks for the VRM1?
post #282 of 847
Thread Starter 
Quote:
Originally Posted by Coree View Post





My Saphire HD7950 950mhz edition with HD7970 PCB for comparison.


Sapphire HD 7950 950mhz Edition exposed.


Your card looks like it is built on reference HD7970 PCB. cool.gif




I am not sure how much clearance your VRM#1 had or your vram has to the stock heat sink but if you have a lot of room I think your best bet for a great air heat sink (IF it fits) would be the Swiftech HD7900-HSF for HD7970.

http://www.swiftech.com/HD7900-HSF.aspx

Not sure it will work with stock heat sink.


I have good experience water cooling my HD7950 with a full cover clock and I think full cover block is the best way to go.


You may be able to fabricate one...

Bummer your card didn't come with any heat sink on the VRM #1 or VRAM. IMO these cards benefit from proper cooling on GPU/VRM/VRAM when over clocking.
Edited by SonDa5 - 1/19/13 at 7:08pm
B.K.T.
(24 items)
 
  
CPUMotherboardGraphicsGraphics
De-Lidded direct die mount Intel i7-4790k No IHS ASUS Z97 WS Sapphire HD7950 OC 950mhz Edition Sapphire HD7950 Vapor X 
RAMHard DriveHard DriveHard Drive
GSkill 2400mhz CL9  Samsung 840 caviar black Hitachi 
Hard DriveOptical DriveCoolingCooling
OCZ AGILITY 4 LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  
CoolingCoolingCoolingOS
Swiftech pump 655 Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit 
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BenQ XL2410T SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW 
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B.K.T.
(24 items)
 
  
CPUMotherboardGraphicsGraphics
De-Lidded direct die mount Intel i7-4790k No IHS ASUS Z97 WS Sapphire HD7950 OC 950mhz Edition Sapphire HD7950 Vapor X 
RAMHard DriveHard DriveHard Drive
GSkill 2400mhz CL9  Samsung 840 caviar black Hitachi 
Hard DriveOptical DriveCoolingCooling
OCZ AGILITY 4 LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  
CoolingCoolingCoolingOS
Swiftech pump 655 Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit 
MonitorKeyboardPowerCase
BenQ XL2410T SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW 
MouseMouseMouse PadAudio
Steel Series sensei Steel Series sensei SS Experience I-2, SS 9HD Audio Technica ATH-AD900 
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post #283 of 847
Does that lone VRM 1 near the CF connectors get as hot as the others? Is it powering the memory instead of the core?
post #284 of 847
Yes, it gets hotter if there is no heatsink. I don't have a heatsink there, and it can be 15-20C hotter than the VRM2 where i have a heatsink...
Edited by Coree - 1/20/13 at 11:54am
post #285 of 847
Quote:
Originally Posted by SonDa5 View Post





My Saphire HD7950 950mhz edition with HD7970 PCB for comparison.


Sapphire HD 7950 950mhz Edition exposed.


Your card looks like it is built on reference HD7970 PCB. cool.gif




I am not sure how much clearance your VRM#1 had or your vram has to the stock heat sink but if you have a lot of room I think your best bet for a great air heat sink (IF it fits) would be the Swiftech HD7900-HSF for HD7970.

http://www.swiftech.com/HD7900-HSF.aspx

Not sure it will work with stock heat sink.


I have good experience water cooling my HD7950 with a full cover clock and I think full cover block is the best way to go.


You may be able to fabricate one...

Bummer your card didn't come with any heat sink on the VRM #1 or VRAM. IMO these cards benefit from proper cooling on GPU/VRM/VRAM when over clocking.
They don't sell that heatsink anywhere in Finland frown.gif Any other suggestions?
post #286 of 847
Thread Starter 
Quote:
Originally Posted by Coree View Post

They don't sell that heatsink anywhere in Finland frown.gif Any other suggestions?

Another available multi GPU block that will fit your card..... BUT you will need to get a shim to fit it properly. EK makes shims.
B.K.T.
(24 items)
 
  
CPUMotherboardGraphicsGraphics
De-Lidded direct die mount Intel i7-4790k No IHS ASUS Z97 WS Sapphire HD7950 OC 950mhz Edition Sapphire HD7950 Vapor X 
RAMHard DriveHard DriveHard Drive
GSkill 2400mhz CL9  Samsung 840 caviar black Hitachi 
Hard DriveOptical DriveCoolingCooling
OCZ AGILITY 4 LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  
CoolingCoolingCoolingOS
Swiftech pump 655 Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit 
MonitorKeyboardPowerCase
BenQ XL2410T SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW 
MouseMouseMouse PadAudio
Steel Series sensei Steel Series sensei SS Experience I-2, SS 9HD Audio Technica ATH-AD900 
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Reply
B.K.T.
(24 items)
 
  
CPUMotherboardGraphicsGraphics
De-Lidded direct die mount Intel i7-4790k No IHS ASUS Z97 WS Sapphire HD7950 OC 950mhz Edition Sapphire HD7950 Vapor X 
RAMHard DriveHard DriveHard Drive
GSkill 2400mhz CL9  Samsung 840 caviar black Hitachi 
Hard DriveOptical DriveCoolingCooling
OCZ AGILITY 4 LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  
CoolingCoolingCoolingOS
Swiftech pump 655 Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit 
MonitorKeyboardPowerCase
BenQ XL2410T SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW 
MouseMouseMouse PadAudio
Steel Series sensei Steel Series sensei SS Experience I-2, SS 9HD Audio Technica ATH-AD900 
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post #287 of 847
I used a heatgun to measure the temp on the backside of the PCB near the VRM's and the uncovered VRM near the CF connectors was about the same temp as my main VRM's. Both places measured around 70C.

In fact, I'm starting to think that heatsinking the backside of the PCB could gain quite a few degrees. PCB temp responds pretty fast to load changes so there is significant thermal conductivity. Might glue some leftover heatsinks on open spaces near the VRMs and compare results.
post #288 of 847
So today I tried flashing the Sapphire 7950 Vapor-X bios onto my 7970 Vapor-X since they apparently use the same PCB. No effect on active stream processors or texture units. GPU-Z and Trixx still counted 2048 stream processors and 32 texture units even with a 7950 bios. So the 7950 must have those features locked out at a hardware level - simply putting a 7970 bios on a 7950 with a 7970 PCB will not unlock those extra shaders and texture units like it would when flashing a 6950 to a 6970. I do believe this actually makes some difference at identical clocks speeds.
post #289 of 847
I'm planning on ordering a TF3 tomorrow, getting a waterblock for it eventually.
PWNzershreck
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PWNzershreck
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Hard DriveOptical DriveCoolingOS
2x Samsung 840 Pro  ASUS DVD-RW SATA Koolance 380i & 2x HW Labs 480GTX Arch Linux x86_64, Windows 7 x64 
MonitorKeyboardPowerCase
LG UC88-B Ultrawide, ASUS VS278Q Ducky Corsair AX1200i Caselabs STH10 
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post #290 of 847
Hi any new cards other than the three that have the 7970 PCB? I am interested in purchasing one, maybe the Sapphire one if it can fit in my budget, but so far I am leaning towards the black PCB 7950 PCS+ from Powercolor. Its also like $50 cheaper.
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