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XFX 7850 Double Dissipation Cooler

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#1
Ive been having problems with artifacts around windows aero bars under low load states in windows 7 while doing two monitors on my XFX 7850. I decided to remove my HSF. Half of the VRM Ram modules are covered by the heat sink frame. Do you think this could cause it?



Any thoughts?

The heat sink's frame is metal with black paint. Could I just thermal paste between the VRM and that black area (circled red)?
 
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#2
Those are memory chips and the contact is needed for heat dissipation, thermal paste is not needed.

These are the voltage regulator modules:




Artifacts on desktop usually means bad video memory.
You can test your VRAM with MemtestCL at http://folding.stanford.edu/English/DownloadUtils
 
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brandonwh64

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#3
Doesn't it suppose to have thermal tape between the memory chips and the heatsink?
 

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#5
The white stuff on these memory chips

 
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#7
Okay thanks for clarification on VRM versus memory, wasn't sure about it. Do you guys think I should try thermal paste between that black painted metal on the shroud/frame and the modules?
 
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#8
Could I just thermal paste between the VRM and that black area (circled red)?
Doesn't it suppose to have thermal tape between the memory chips and the heatsink?
It most definitely should have, I assumed the "black area" is black thermal tape. If not, no wonder artifacts started to show.
 
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#9
It most definitely should have, I assumed the "black area" is black thermal tape. If not, no wonder artifacts started to show.
Nope, its just painted metal. No thermal tape or paste. With the metal painted, it should still conduct okay right? no need to sand the paint off?
 
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#11
Nope, its just painted metal. No thermal tape or paste. With the metal painted, it should still conduct okay right? no need to sand the paint off?
No use in sanding it off, best if you can buy one of those sticky/spungy thermal tapes and cover the "black area".

Or you can slap some thermal paste on memory chips as d1nky says, and give it a go.
 
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#12
Okay I arctic silver 5'd the core and the memory modules. GPU temperatures seem higher than before. Kind of annoying. I used a very small amount of thermal paste, didn't spread it on the core just put it in the center and clamped it. I am running furry cube in GPU caps viewer to heat it up, current temp is 77*C :(

Its taking a long time to get back down to idle temperatures. Maybe I fucked that up huh?
 

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#13
Okay I arctic silver 5'd the core and the memory modules. GPU temperatures seem higher than before. Kind of annoying. I used a very small amount of thermal paste, didn't spread it on the core just put it in the center and clamped it. I am running furry cube in GPU caps viewer to heat it up, current temp is 77*C :(
Umm no this could damage the memory chips and almost glue them to the cooler after it cures. Be careful taking the cooler off or you may have a memory chip go with it.
 
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#14
If I were you I would just get a RMA and get it replaced.
 

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#15
If I were you I would just get a RMA and get it replaced.
If he took the cooler off then the warranty is gone. XFX puts a sticker on the screws holding the heatsink on newer cards such as my 6950.

 
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#16
If he took the cooler off then the warranty is gone. XFX puts a sticker on the screws holding the heatsink on newer cards such as my 6950.
good to know. hmm in that case may be get an after market cooler which will seat best on GPU as well as give some protection to the mem modules.
 
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#17
Okay I arctic silver 5'd the core and the memory modules. GPU temperatures seem higher than before. Kind of annoying. I used a very small amount of thermal paste, didn't spread it on the core just put it in the center and clamped it. I am running furry cube in GPU caps viewer to heat it up, current temp is 77*C :(

Its taking a long time to get back down to idle temperatures. Maybe I fucked that up huh?
lol maybe, hopefully it just needs some time. BTW does it even have enough pressure to be done that way?
 
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#18
Okay guys, removed it, the ram didn't even end up transferring paste to the black metal so I gave up on that idea and just re-pasted the core. I used a bit more paste and spread it around so as to be similar to the stock arrangement.

I will let it idle for a few hours before I do anything this time. As far as warranty goes, I saw somewhere that XFX is okay with it if you tell them you removed the screws. If not, oh well.
 

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#19
Okay guys, removed it, the ram didn't even end up transferring paste to the black metal so I gave up on that idea and just re-pasted the core. I used a bit more paste and spread it around so as to be similar to the stock arrangement.
Thats another thing I figured as well since thermal tape is pretty thick and pillowy. I would order some thermal tape and test it out before going full custom cooler
 
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#20
Thats another thing I figured as well since thermal tape is pretty thick and pillowy. I would order some thermal tape and test it out before going full custom cooler
Okay, I'll order some. In the mean time this card is gonna idle for a bit, then maybe I'll run unigen heaven for an hour on loop or something (with full fans just to be sure) to get the temps around 50 and cook it in before any gaming. I have only messed with the cooler on a x800xl and a 7800GT back in 2007, but for what its worth this was the simplest cooler I have had to remove, no hidden screws...
 

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#21
Okay, I'll order some. In the mean time this card is gonna idle for a bit, then maybe I'll run unigen heaven for an hour on loop or something (with full fans just to be sure) to get the temps around 50 and cook it in before any gaming. I have only messed with the cooler on a x800xl and a 7800GT back in 2007, but for what its worth this was the simplest cooler I have had to remove, no hidden screws...
You will end up killing the card if you over heat the GPU, VRAM
 
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#22
You will end up killing the card if you over heat the GPU, VRAM
Right now its basically stock. It didn't have any paste or tape on the vram to start with. So it would have died anyway if thats the case. I haven't noticed any artifacts except in windows 7, 2D mode I assume.
 
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#23
Okay guys, removed it, the ram didn't even end up transferring paste to the black metal so I gave up on that idea and just re-pasted the core. I used a bit more paste and spread it around so as to be similar to the stock arrangement.

I will let it idle for a few hours before I do anything this time. As far as warranty goes, I saw somewhere that XFX is okay with it if you tell them you removed the screws. If not, oh well.
Artic Silver is conductve, might want to get some "Thermal Paste"(non conductive) for the contacts of the memory when you get the thermal pads.
 
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Display(s) SyncMaster 2343BWX 23" 2048x1152 / Dell 1909W 19" 1440x900
Case Sunbeam Transformer Silver - frame is built like a tank
Audio Device(s) X-Fi Extreme Music | X-Fi Titanium - Bookshelf system
Power Supply Corsair TX650 v1
Software Windows XP/7/8.1/10
Benchmark Scores Xeon E3-1290 cpuz world record
#24
I rma'd a xfx 7870 single fan version same cooler with 4 pipes. Had no thermal pads at all. no vrm cooling either. Had artifacts and issues maybe cause of this same issue.
 

de.das.dude

Pro Indian Modder
Joined
Jun 13, 2010
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Location
Pune
System Name la de da... | Samsung NP355V5C-S05IN
Processor FX 8320 | AMD A8-4500
Motherboard ASRock 990FX Extreme 4 | Samsung something something
Cooling CM Hyper 212 EVO push:pull+ 1 panaflow 113CFM + 2 x 120mm NZXTs | Coolermaster Notepal
Memory 2x4GB DDR3 Corsair Vengeance 1600MHz CL9 | Samsunng 4GB + 2GB DDR3 1600MHz
Video Card(s) AMD 7790 GHZ edition! | 7670M + 7640G
Storage 1TB WD10EZEX | W.D 500GB Green AADS | Samsung 1TB
Display(s) dell S2240l 1080p IPS 21.5" | Samsung antiglare 15.6"
Case NZXT Guardian 921RB(@home) and Antec ASK4000B U3(Current)
Audio Device(s) Realtek ALC892 with THX True Studio | Realtek something
Power Supply Corsair GS600 | 90W Brick, 6 cell 48000mAh battery
Mouse Logitech G400, GOD TIER MOUSE!! LOGitech F310 gamepad!
Keyboard Logitech K200
Software Windows 8.1 x64 | Windows 8.1 x64
Benchmark Scores real men do bench presses not bench marks.
#25
Doesn't it suppose to have thermal tape between the memory chips and the heatsink?
not necessary, samsung chips usually dont get hot. the ones on the gts450 i have are 4000mhz, and arent sinked.