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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1225

post #12241 of 37078
Hi Everybody, I need a piece of advice: I wanna buy an HD7970 reference to put that under water, i wanna know what's the best reference model out there ? I'd like to have the possibility of changing volages through bios, which referece card have this possibility? Is it possible to put under water with a full cover a NON reference card like ASUS Direct CU II?

I Have also an issue I'm experiengig with Driver 12.4 WHQL: When I visualize a game in a very dark zone, my monitor swith off from itself, i experienced a performance boost disablig GPU Adaptive fuction from catalyst and a partial solution to this problem that unfortunately is still there even if without that fuction is less sensible. WHich is the option I don't need to prevent this kind of problem?
post #12242 of 37078
Quote:
Originally Posted by xNAPx View Post

Hi Everybody, I need a piece of advice: I wanna buy an HD7970 reference to put that under water, i wanna know what's the best reference model out there ? I'd like to have the possibility of changing volages through bios, which referece card have this possibility? Is it possible to put under water with a full cover a NON reference card like ASUS Direct CU II?
I Have also an issue I'm experiengig with Driver 12.4 WHQL: When I visualize a game in a very dark zone, my monitor swith off from itself, i experienced a performance boost disablig GPU Adaptive fuction from catalyst and a partial solution to this problem that unfortunately is still there even if without that fuction is less sensible. WHich is the option I don't need to prevent this kind of problem?


Sapphire HD 7970 Dual X . uses ref HD 7970 PCB. has 5 (GPU) + 2 (memory) phases compared to 5 + 1 for ref HD 7970. you can see pictures here.

http://hardforum.com/showthread.php?p=1038674565

this card is a fantastic overclocker with very good memory overclocking too. comes with dual BIOS. the 2nd BIOS allows aggressive overclocking. With sapphire trixx and voltage tweaking this card can do 1250 Mhz . here is a review

http://www.hardocp.com/article/2012/04/10/sapphire_hd_7970_oc_edition_video_card_review/

This card is also available at a very good price of USD 480.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814102982
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post #12243 of 37078
Quote:
Originally Posted by sena View Post

Hmm, i am in the same boat with mem, dont know is it really stable?
My mem is really stupid, on 1250 MHz i am getting 42.2 fps, on 1260 MHz i am getting 42 fps.

Have a look here bro... I did some testing in Heaven some time ago, might help you (and others) out thumb.gif

http://www.overclock.net/t/1196856/official-amd-radeon-hd-7950-7970-owners-thread/6840#post_16770232
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post #12244 of 37078
Quote:
Originally Posted by sena View Post

Hmm, i am in the same boat with mem, dont know is it really stable?
My mem is really stupid, on 1250 MHz i am getting 42.2 fps, on 1260 MHz i am getting 42 fps.

Well... I would think that such a small jump like that won't be noticeable at all... plus .2 fps would just be left to error of the app monitoring it.

You need to do a huge jump to see a difference.

But yep... I'm on the same boat. No idea how to check it.
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post #12245 of 37078
Quote:
Originally Posted by sena View Post

Now i discovered something funny, on 1400 MHz memory i am getting 0.2 fps less than on 1375 MHz, but if i raise memory speed to 1575 MHz, i get almost one frame over 1375 MHz, my first thought was ECC, but why higher clock is working ok? Tested in Heaven 2.1.
If anyone can give some light on this, i would really appreaciate.

.2 frames is margin of error. Push that thing.
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post #12246 of 37078
One my friend noticed the similar thing, exm. 1775 was faster than 1800.
What hell is happening here?
btw 0.2 is in margin of error, but not in heaven, i can run bench 20 times, and i will always get the same score.
Edited by sena - 6/18/12 at 9:04am
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post #12247 of 37078
Quote:
Originally Posted by raghu78 View Post

Sapphire HD 7970 Dual X . uses ref HD 7970 PCB. has 5 (GPU) + 2 (memory) phases compared to 5 + 1 for ref HD 7970. you can see pictures here.
http://hardforum.com/showthread.php?p=1038674565
this card is a fantastic overclocker with very good memory overclocking too. comes with dual BIOS. the 2nd BIOS allows aggressive overclocking. With sapphire trixx and voltage tweaking this card can do 1250 Mhz . here is a review
http://www.hardocp.com/article/2012/04/10/sapphire_hd_7970_oc_edition_video_card_review/
This card is also available at a very good price of USD 480.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102982

Same card I've got. Unboxed it, flipped the bios switch to 2 before installing, installed it and started overclocking it. Last night, I tweaked it a bit more and ran Heaven DX11 overnight at 1920x1080 with extreme tessellation. Used HWInfo64 to read the stats out of it and checked in on it this morning. Max VRM temp was 72ºC, hottest core temp got up to 69ºC. Only thing is, this unit has some serious vdroop. GUI shows 1206 for vcore but under load drops to 1.051v, and idle is close to 1.174v. Ran stable at 1200/1825 like this with 1.654v going into the vram. I would highly recommend this card. It's fast as all get out, quiet, and is an overclocking beast.
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post #12248 of 37078
Quote:
Originally Posted by raghu78 View Post

Sapphire HD 7970 Dual X . uses ref HD 7970 PCB. has 5 (GPU) + 2 (memory) phases compared to 5 + 1 for ref HD 7970. you can see pictures here.
http://hardforum.com/showthread.php?p=1038674565
this card is a fantastic overclocker with very good memory overclocking too. comes with dual BIOS. the 2nd BIOS allows aggressive overclocking. With sapphire trixx and voltage tweaking this card can do 1250 Mhz . here is a review
http://www.hardocp.com/article/2012/04/10/sapphire_hd_7970_oc_edition_video_card_review/
This card is also available at a very good price of USD 480.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102982
Thanks Mate, nice card, I'll take a look at it, thanks,
post #12249 of 37078
Guys i have some new info, i tested 1375 vs 1575 in Dirt 2, and there were 5-6 fps difference, in other words 1575 was faster for about 5 fps.
Edited by sena - 6/18/12 at 9:45am
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post #12250 of 37078
So you can use the EK reference 7970 block on the Saphire Dual X? If so I may just grab a couple of those instead of waiting on the XT2..
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