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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1542

post #15411 of 38701
Quote:
Originally Posted by raghu78 View Post

your core clock can definitely be pushed to 1150 Mhz . monitor both core and VRM temps. Try with 1175 VDDC you should be able to easily hit 1150 - 1200 Mhz. the max VDDC is around 1.3 - 1.35v. But you don't need to worry. What matters is the temperatures of the chip and VRM. good luck thumb.gif

1175 VDDC and 1150Mhz doesn't even load Heaven 3.0 - gonna try with 1100Mhz now

Edit: it booted with 1100Mhz but got some artifacts a few minutes into it, suggestions?
Edited by gamesandstuffs - 9/5/12 at 7:47am
post #15412 of 38701
Quote:
Originally Posted by gamesandstuffs View Post

1175 VDDC and 1150Mhz doesn't even load Heaven 3.0 - gonna try with 1100Mhz now
Edit: it booted with 1100Mhz but got some artifacts a few minutes into it, suggestions?

try 1.2v and 1150 Mhz and then 1.225. if heaven runs stable make sure core temps are below 75c and VRM temps below 95c. after heaven try BF3.
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post #15413 of 38701
Quote:
Originally Posted by Kitarist View Post

So can anyone achieve 1050mhz of OC on stock voltage?

my card does 1100mhz table on stock voltage. I tested it in heaven 3.0 twice.
Quote:
Originally Posted by EliteReplay View Post

Im glad i didnt got the 7950 VaporX or the Sapphire OC version as it was suggested by other since there are ppl having issue with then, sorry for those of you that went into that , and i got my sweet XFX R7950 DD BlackEdition Warning: Spoiler! (Click to show)

4 out of 5 people between this and another forum who bought the xfx 7950 at $300 2 months ago got DOA out of box. then there'sthe issue of dealing with xfx if the need arises. not the best choice one can make.
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post #15414 of 38701
You need to do at least 45 minutes of Heaven 3.0 to check an overclock. My cards can do 1150 on stock voltage, but only 1140 on stock voltage in sleeping dogs. Even crysis 2 max out is fine at 1150.
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post #15415 of 38701
Quote:
Originally Posted by raghu78 View Post

try 1.2v and 1150 Mhz and then 1.225. if heaven runs stable make sure core temps are below 75c and VRM temps below 95c. after heaven try BF3.

Thanks for the help, although I tried 1.225 vddc at both 1150Mhz and then at 1100Mhz.


Both times there's a specific scene in Heaven 3.0 (the grass close up and then the focus change) where there are alot of artifacts flashing all over the screen.

Lowering it to 1075Mhz gets rid of those artifacts redface.gif



Not sure how to proceed, 1075 is a nice overclock, it scored me 1118 :3
post #15416 of 38701
Yeah, every card is different. I can do 1110MHz / 1575MHz stable on stock voltage with my Sapphire 7970 Dual-X. It runs okay at 1125MHz for a while, but crashes in games and sometimes even in Windows. 1110MHz is completely stable though. I wish I could do 1150MHz on stock, but then it's only a tiny bit more...

(I'm using a 1440p monitor, not sure if it makes a difference - definitely seems to in terms of VRM temperatures at least).
   
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post #15417 of 38701
Quote:
Originally Posted by gamesandstuffs View Post

Thanks for the help, although I tried 1.225 vddc at both 1150Mhz and then at 1100Mhz.
Both times there's a specific scene in Heaven 3.0 (the grass close up and then the focus change) where there are alot of artifacts flashing all over the screen.
Lowering it to 1075Mhz gets rid of those artifacts redface.gif
Not sure how to proceed, 1075 is a nice overclock, it scored me 1118 :3

check 1075 in BF3. if its stable stick with that. 1075 is ok, not good. But still performance will be very close to HD 7970 Ghz, maybe 3 - 5% slower.
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post #15418 of 38701
Quote:
Originally Posted by Ragsters View Post

What do you guys think of this card from XFX?
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150616
I've seen a FPS in games test between exactly that XFX 7950 card and GTX 670 and 680!
When they overclocked the XFX 7950 it outperformanced the GTX 670 easily and even the GTX 680 got beaten up in some game titles, so it's proberly a great card! biggrin.gif
    
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post #15419 of 38701
what is the max safe memory volt ?
i heard that BF3 love high clocked memory i am now it 1550 stock volt i want to push it to 1600
Edited by mltms - 9/5/12 at 9:07am
post #15420 of 38701
Quote:
Originally Posted by pioneerisloud View Post

And if you use another cooler.....say goodbye to any warranty you had before, because XFX puts stickers over the screws to tell if you've messed with the card or not.
I hate on XFX, yes. But I do so with good reason. tongue.gif
Here's a chat I had with an XFX rep I talked to when I had to RMA my 6850 earlier this year.

Me: I do have all the original parts however on 2 of the screws that held the heatsink in place there were little stickers saying something along the lines of "Void warranty if removed" and they were a real pain to get off so I basically just tore them up so I could get to the screws underneath.

XFX rep: Hi John, Breaking those seals wont void you warranty in north america,

They sent me a 6870 a week or so later. Also, I didn't have the double lifetime warranty they usually offer since I didn't register the card within 30 days of purchase.
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