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HD7950 revised with reference HD7970 PCB club - Page 5

post #41 of 847
Quote:
Originally Posted by SonDa5 View Post

How is it going?

seems that 1100/1575 is the limit for my card, no volts over 1.2 provide any headroom. I am still getting a black screen apon playing flash games (facebook) but I do think that is a driver issue.

I did try to flash the card with 2x diff sapphire 7970 bios today, both would not display video output. Had to bust out the old 470 and reflash the card.

Really wish I could fix this black screen issue.
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post #42 of 847
i have a gigabyte 7950 and am able to oc past my previous limit of 1100 core. i used trixx to set the oc and afterburner for the voltages. here is my latest heaven so far at 1175 core and 1600 mem.



the msi ab changes to the oc settings of trixx. the sliders will allow for oc'ing up to 1300 core and 1600 mem but i doubt if my card will achieve those. btw, this is without flashing.without trixx, msi ab will only allow 1100/1575.
Edited by rdr09 - 8/14/12 at 8:54am
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post #43 of 847
Quote:
Originally Posted by rdr09 View Post

i have a gigabyte 7950 and am able to oc past my previous limit of 1100 core. i used trixx to set the oc and afterburner for the voltages. here is my latest heaven so far at 1150 core and 1550 mem.

the msi ab changes to the oc settings of trixx. the sliders will allow for oc'ing up to 1300 core and 1600 mem but i doubt if my card will achieve those. btw, this is without flashing.without trixx, msi ab will only allow 1100/1575.

Sapphire trixx is easy to use. allows to easily overclock upto 1300 Mhz on HD 7900 cards . you can save custom fan profiles according to the temps you want and depending on your overclock speeds. its the utility I use to overclock even though I stick to stock voltage overclock on my HD 6950 to 860 Mhz.
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post #44 of 847
Thread Starter 
I'm going to try a reference HD7970 water block on my card soon. Want to improve my memory and VRM cooling.
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post #45 of 847
Quote:
Originally Posted by SonDa5 View Post

I'm going to try a reference HD7970 water block on my card soon. Want to improve my memory and VRM cooling.

why not just add a fan on your current heatsink?

btw, i am weary of flashing my gpu coz it only has the 6/6 pin power connector and thanks for sharing this info.
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post #46 of 847
Thread Starter 
Quote:
Originally Posted by rdr09 View Post

why not just add a fan on your current heatsink?



I have fans blowing right on vrm area and temps are still not low as those with full cover block that I have seen.
Edited by SonDa5 - 8/13/12 at 10:21am
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post #47 of 847
Thread Starter 
My new Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl arrived today.

Bought it from Sidewinder Computers http://www.sidewindercomputers.com/wahegp79fora.html

It's still in stock. Great block and it's priced decent at Sidewinder Computers.



Will get it installed ASAP.
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post #48 of 847
Quote:
Originally Posted by SonDa5 View Post

I'm going to try a reference HD7970 water block on my card soon. Want to improve my memory and VRM cooling.

That's ironic, lol.
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post #49 of 847
Thread Starter 
Quote:
Originally Posted by tsm106 View Post

That's ironic, lol.

It's an awesome looking block and Sidewinder computers had it priced decently. If it would have been out before when I bought the Swiftech MCW82-7900 I probably would have bought it.


Performance wise it has its ups and downs. MCW82-7900 is still superior for gpu only cooling.

hkinsidecaseday1.jpg


My initial test.



Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl

28C ambient temps.

11+ minute test at 1205/1575
VDDC set to 1.16
Board Power Li at +15


Heatkillertest.jpg




I thought the Heatkiller block would do better on the VRM temps.

Also during my Furmark run there are some low spots on the temps and that happened when I pinched on my Swiftech Apogee HD CPU block tubing that goes directly to the reservoir. I ran it like this with the Swiftech MCW-7900 block and temps seemed fine but the Heatkiller is much more restrictive and when I pinch on that 3rd reservoir hose the water is forced to go to the GPU block instead and the increased water pressure cools the card down.

I can't find my Apogee HD block screw in plug so I had to leave the output flowing for now.
When I find that plug I am going to reconfigure my loop and hope to lower temps.
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post #50 of 847
Thread Starter 
Another photo of the Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl on my Sapphire HD 7950 950mhz edition.

HKonthecard.jpg
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