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[Official] AMD HD 69xx Owners Club - Page 198

post #1971 of 3890
Quote:
Originally Posted by snow cakes View Post
If I bought 2x 6950's in xfire, would it be better performance than a single 6970?
2x 6950's should be able to easily outperform a 6990.
    
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post #1972 of 3890
Quote:
Originally Posted by iRaiden View Post
2x 6950's should be able to easily outperform a 6990.
A single 6950 can EASILY be overclocked to perform like a 6970. 2 6950s can be overclocked to be similar to two 6970s.
post #1973 of 3890
Quote:
Originally Posted by Dr.GumbyM.D. View Post
Dunno if you've seen CallsignVega's thread on his quad 580s or whatever monstrosity of awesomeness it is, but in his quest for the best, he had gone through quad 6970s IIRC, and the long discussion (I was following his build thread on HardOCP, before I knew of OCN) came across the interconnects between ATI cards, that people were thinking that for watever reason they just couldn't push the bandwidth through CF links that was necessary to get that fourth card scaling. Of course, that was just speculation (though they had some pretty good reasoning to support that claim, but it was just a claim).

Now, quad crossfire with 6990s may be different since the interconnects between the Cayman chips are onboard for each pair, so they may be able to move more data that way, but with separate 6970s, I believe it was a no-go.

Wermad, welcome to the club! I've been following your troubles in the other thread about the nickle plating. It's a real shame. The nickel is nice since you don't get the tarnishing that copper gets, but oh well, not worth the hassle to me after seeing this whole debacle. I'm very happy with Razor 6970s, though I'm sure you've been/you will research the heck out of your next waterblock. I sincerely hope you have better luck going forward!
Vega's rig is wild and crazy, wish I had a rig like that
post #1974 of 3890
I'm planning to buy a HIS HD6950 1GB reference card. Any reasons not to? There is a cheaper Powercolor option but the red PCB is a no-no for me.

For the same price I can get a GTX560 Ti as well - thoughts?

Edit: Decided on getting the 2GB version instead for an addition $34 and attempting the unlock. Wish me luck
Edited by NrGx - 6/3/11 at 2:50pm
post #1975 of 3890
How far can I go with memory overclock (without damaging it and shortening it's life span by much)? I overclocked my mem 1400 and it seems to work fine, should i push it more?

Another question - how can i disable the overclocking function in MSI AB? I prefer to overclock through CCC, but MSI always restores the settings to the ones stored in it's profile
Edited by Akusho - 6/3/11 at 7:09am
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post #1976 of 3890
Quote:
Originally Posted by Akusho View Post
How far can I go with memory overclock (without damaging it and shortening it's life span by much)? I overclocked my mem 1400 and it seems to work fine, should i push it more?

Another question - how can i disable the overclocking function in MSI AB? I prefer to overclock through CCC, but MSI always restores the settings to the ones stored in it's profile
I would say until you get unstable overclock or until your performance starts decreasing instead of increasing.
post #1977 of 3890
Quote:
Originally Posted by Tuxi View Post
I would say until you get unstable overclock or until your performance starts decreasing instead of increasing.
Thanks! 1450 seems to be stable too, will try 1500.
Thought that 880 1.1v core was ok(looped 3dmark 11 for 1.5hours), but Crysis 2 kept crashing until i lowered the clock to 855 =( was ok with 1450 on mem though.

Does anybody know how to disable overclock in AB?
Edited by Akusho - 6/3/11 at 12:19pm
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post #1978 of 3890
Quote:
Originally Posted by Akusho View Post
Thanks! 1450 seems to be stable too, will try 1500.
Thought that 880 1.1v core was ok(looped 3dmark 11 for 1.5hours), but Crysis 2 kept crashing until i lowered the clock to 855 =( was ok with 1450 on mem though.

Does anybody know how to disable overclock in AB?
I've been having no problem @ 900/1375 on both of my 6950s with stock voltage during gaming. I don't really bother overclocking currently because I'm not playing any heavy-duty games recently.

Every card is different, but you're sure the crashing was due to the clocks? Nothing else changed between running the game? Have you re-tried launching the game, maybe something messed it up the first time? What was the symptom of the crash?

Also, for disabling overclock, you just set it at stock speeds? Or don't run afterburner and don't have it run at startup.
post #1979 of 3890
The symptom? System freeze
Lowered the clocks from 880 to 865 = freeze, 855 - worked OK.
My previous 6950ref couldn't handle 880 even in 3dmark, so i guess you are just lucky with your cards =)
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post #1980 of 3890
Quote:
Originally Posted by Akusho View Post
The symptom? System freeze
Lowered the clocks from 880 to 865 = freeze, 855 - worked OK.
My previous 6950ref couldn't handle 880 even in 3dmark, so i guess you are just lucky with your cards =)
I only ask because I've seen that at least with battlefield Bad company 2 there are problems often blamed on overclocks, drivers, etc that have been demonstrated (mostly) to be due to problems with Punkbuster that hard-lock systems up. If it went away for you, then that's excellent. I guess your card just doesn't like higher clocks. Sorry to hear it. My 2600k is under water, but it will not go above 4.7 and stay stable, regardless of temps, voltage, etc, but I'm also not a professional overclocker, so I'm sure sure someone more 1337 than I could make it beg for mercy.
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