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AMD Radeon 6990 Club - Page 204

post #2031 of 4103
Hey guys recently purchased a 6990 and using afterburner 2.1.0 it doesnt give me the option to up the core voltage? Also whats the safest max voltage I can push it to?
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post #2032 of 4103
Thread Starter 
I have 2 EK-6970 nickel block, and nickel EK Supreme HF for my CPU, and don't have any problems. I just double-checked all, and water is still crystal clear, and I don't see any ''flaking'' (transparent clear top).

I'm using distilled water + silver killcoil + 3 drops of Lugol solution (iodine)/liter of distilled water.

i have also copper (no plating) EK-5970 and EK-5870 and those were corroded like crazy after 1 year. I had to give them a citrus bath to make them looking brand new again. But it's bare copper. Expected.
    
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post #2033 of 4103
^^How old are your blocks? Mine are from Dec to Feb. I'm ripe for exposed copper to nickel corrosion, yikes.

Quote:
Originally Posted by HiLuckyB View Post
We will have to see if anyone has a bad 6990 block out there, Or 6970 blocks Because I know there are alot of 6990+6970 Tri-Fire's out there
There are bad 6970 blocks. Check the XS threads with 6970 nickel issue pics.

Quote:
Originally Posted by xAlex79 View Post
I'm a bit lazy, I'm using thermaltake UV reactive pre mixed coolant. Not too sure what's in it. I can have a look tonight and let you know.

It's been two months now 24/7

Sent from my MB860 using Tapatalk
Unfortunately anti-corrosive coolant won't help, because the coolant only reduces the liquid medium's chance to become an electrolytic. With this nickel issue, since the copper is exposed to the liquid AND it's TOUCHING the nickel, it WILL go through bi-metal corrosion. It's really a situation.
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post #2034 of 4103
Thread Starter 
Quote:
Originally Posted by tsm106 View Post
^^How old are your blocks? Mine are from Dec to Feb.
Last september to january this year. So I'm at risk also. But I will switch to the next generation of AMD or Nvidia cards this year, so I don't really care. I will throw them in the garbage when upgrading if they are corroded.

Just to think that I have a copper mine at 10 minutes from home... humm... should go dig my own copper next time.
    
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post #2035 of 4103
Quote:
Originally Posted by MACH1NE View Post
Hey guys recently purchased a 6990 and using afterburner 2.1.0 it doesnt give me the option to up the core voltage? Also whats the safest max voltage I can push it to?
Go get MSI Afterburner 2.2.0 Beta 3 http://forums.guru3d.com/showthread.php?t=344032
If you are using the air cooler you won't be able to push much without having the fan turned way up.
Edited by HiLuckyB - 6/10/11 at 9:39am
post #2036 of 4103
I'm thinking after I get back home and go in for an interview, I'm going to save up for a maximus IV and get either another 2x6970s or just buy a 6990. Think I'm going to buy a 6990. Quadfire will rule, and I'll be giving the 6990 it's own PSU and just false jump it to power the 6990 without getting a whole new PSU.
    
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post #2037 of 4103
Quote:
Originally Posted by Anthraxinsoup View Post
I'm thinking after I get back home and go in for an interview, I'm going to save up for a maximus IV and get either another 2x6970s or just buy a 6990. Think I'm going to buy a 6990. Quadfire will rule, and I'll be giving the 6990 it's own PSU and just false jump it to power the 6990 without getting a whole new PSU.
Quad-fire really, really has stepped up in comparison to preceding generations. What miffs me is the various youtube video "benchmarks" (an entire series of said videos featuring comparative runs against sli 590 being case in point) which, if taken seriously, indicate the most infrequent of actual positive scalability & relatively flimsy scores at 1600p. It's absolute nonsense.

I run the fan array for my cooling loop (20 radiator, 4 case & a dual 60mm ramsink), the fan controller, one of the 6990s, and my secondary "backup" pump off a 2nd PSU. Built a nifty little switch to operate & maintain it's operation without direct mobo interfacing. Much easier, imo, than implementing a single uber capacity device. Although both of mine are 1220 watt, thankfully my home business required a flash drier & conveyor oven installed & thus warranted massive electrical infrastructure upgrades. When your GPU tandem is pushing 1200 watts under load, don't overlook the fundamentals
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post #2038 of 4103
Mafia II doesn't scale well with 2 x 6990 even with a GTX 465 PhysX card. Have to disable Crossfire to get good frames. Catalyst 11.5b + CAP4.

If I remember correctly, it worked pretty good with 2 x 5970s 4GB version.
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post #2039 of 4103
Quote:
Originally Posted by HiLuckyB View Post
Has anyone had a 6990 block with this problem yet? I havn't looked at my block yet
I've no issues. I use RO/DI water and G12 coolant though
     
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post #2040 of 4103
Quote:
Originally Posted by Ken1649 View Post
Mafia II doesn't scale well with 2 x 6990 even with a GTX 465 PhysX card. Have to disable Crossfire to get good frames. Catalyst 11.5b + CAP4.

If I remember correctly, it worked pretty good with 2 x 5970s 4GB version.
What FPS are you getting?
     
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