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Is it time to update my HD 6870 CrossFireX? - Page 3

post #21 of 33
Quote:
Originally Posted by Raven.7 View Post


I ordered the Twin Frorz 3 OC from Amazon.
They were offering me free next day shipping! Will I still get the 7970 PCB?
Also, seeing that we have the same cards, what standard OC speeds should I be shooting for? I know for example that my 6870s can sit at 930/1150 without even having to change the voltage, then I would be able to start bumping up all factors accordingly.

We can't say for sure if you will get the HD 7970 PCB. So let us know when you get it. Without any voltage increase and by just maxing out power option to +20% in AMD CCC you can hit 1 Ghz. For hitting 1.1 - 1.15 Ghz you would need sapphire trixx and a bit of voltage increase. The most important thing you need to achieve is a balance of clock speed, voltage, heat and temps , fan speed and noise. Core temps below 70c and VRM temps below 90c should be your goal. You can use HWinfo32 for logging temps. For stability testing use Heaven 3.0, 3D Mark 11, BF3 and Crysis 2 .As for fan speed and noise you need to work out whats comfortable for you. thumb.gif
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post #22 of 33
Thread Starter 
Quote:
Originally Posted by raghu78 View Post

We can't say for sure if you will get the HD 7970 PCB. So let us know when you get it. Without any voltage increase and by just maxing out power option to +20% in AMD CCC you can hit 1 Ghz. For hitting 1.1 - 1.15 Ghz you would need sapphire trixx and a bit of voltage increase. The most important thing you need to achieve is a balance of clock speed, voltage, heat and temps , fan speed and noise. Core temps below 70c and VRM temps below 90c should be your goal. You can use HWinfo32 for logging temps. For stability testing use Heaven 3.0, 3D Mark 11, BF3 and Crysis 2 .As for fan speed and noise you need to work out whats comfortable for you. thumb.gif

It should be here in the next few hours. Will let you guys know thumb.gif
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post #23 of 33
Thread Starter 
Someone on HardOCP mentioned the cards they got from Amazon both had 7970 PCB.
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post #24 of 33
Thread Starter 
Mail lady just dropped by and left me a mysterious package...

biggrin.gif
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post #25 of 33
Quote:
Originally Posted by Raven.7 View Post

Mail lady just dropped by and left me a mysterious package...
biggrin.gif
Are you ready for disapoitment?
There are no significant performance improvements going from 2x HD6870 to a HD7950 @1080p or 1200 in a single monitor. Bad investment, imo. Is just for the sake of having a 7000 series card. Get an Eyefinity setup or a 30" display or play in S-3D if you want to make your HD7950 investment worthy!
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post #26 of 33
I feel your crossfire pain. Crossfire is horrible. To the above poster, the 7950 will be an upgrade just because its a single card. My 670 probably doesn't have as much power as my unlocked 6950's did, but I see better performance in most games because its only one card.

Kind of off topic, do you really notice heat from your computer? I've never noticed a change in room temperature from my computer, but I don't live in Florida either.
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post #27 of 33
This thread is relevant to me.. Crossfire'd 6870's here too. I just upgraded to a 1440p screen, what was a pretty steady 100fps in BF3 at 1080p is now ~60 with drops into low 40's (All High detail, no AA).. I want my old frame rate back lol. I dont think there is an economical way to do that at the moment, if i was to get a 7950 i would still only be looking at ~60fps?? i would really need to buy 2 of them to get back to where i was tiredsmiley.gif which the wallet is definitely not ready for.. I believe the answer lye's in waiting for the next gen, 7990 performance at the 8970 (hopefully 8950 but wishful thinking) price!
Edited by Garvani - 9/26/12 at 2:54pm
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post #28 of 33
Quote:
Originally Posted by magic8ball88 View Post

I feel your crossfire pain. Crossfire is horrible. To the above poster, the 7950 will be an upgrade just because its a single card. My 670 probably doesn't have as much power as my unlocked 6950's did, but I see better performance in most games because its only one card.
The only game where I felt the "Crossfire pain" was Metro 2033, mostly the micro-stuttering and I could b*tch a little about Batman: AC lack of CF and SLi support in vanilla version. Other than that, I don't know why people moan about CF or SLi so much, I really don't. For me and my games, CF works just fine. Maybe I'm not a picky costumer, I don't know...
Quote:
Originally Posted by Garvani View Post

This thread is relevant to me.. Crossfire'd 6870's here too. I just upgraded to a 1440p screen, what was a pretty steady 100fps in BF3 at 1080p is now ~60 with drops into low 40's (All High detail, no AA).. I want my old frame rate back lol. I dont think there is an economical way to do that at the moment, if i was to get a 7950 i would still only be looking at ~60fps?? i would really need to buy 2 of them to get back to where i was tiredsmiley.gif which the wallet is definitely not ready for.. I believe the answer lye's in waiting for the next gen, 7990 performance at the 8970 (hopefully 8950 but wishful thinking) price!
Yeah, for 1440p, a HD7950 is worthy. I don't know if it can keep the FPS were you want but, maybe with some overclocking it can. Check out some reviews dude...
I really doubt there will be a HD7990 other than the custom PC HD7990 Devil 13 model.
All things consider, and if the HD7950 doesn't deliver the FPS you want, you should wait for next generation cards.
Edited by Johnny Rook - 9/26/12 at 4:52pm
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post #29 of 33
Thread Starter 
Quote:
Originally Posted by Johnny Rook View Post

Are you ready for disapoitment?
There are no significant performance improvements going from 2x HD6870 to a HD7950 @1080p or 1200 in a single monitor. Bad investment, imo. Is just for the sake of having a 7000 series card. Get an Eyefinity setup or a 30" display or play in S-3D if you want to make your HD7950 investment worthy!

Not sure what you mean by that, considering I'm now actually able play Borderlands 2 at 100FPS comfortably with all the settings maxed out compared to 50-60 FPS with FXAA OFF, ambient occlusion OFF, medium textures and a 90F room temperature.

biggrin.gif
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post #30 of 33
Thread Starter 
Quote:
Originally Posted by magic8ball88 View Post

I feel your crossfire pain. Crossfire is horrible. To the above poster, the 7950 will be an upgrade just because its a single card. My 670 probably doesn't have as much power as my unlocked 6950's did, but I see better performance in most games because its only one card.
Kind of off topic, do you really notice heat from your computer? I've never noticed a change in room temperature from my computer, but I don't live in Florida either.

I agree with you on that point. I'm sure in raw performance, the CrossFire setup is faster, but in-game...I can tell tell you the difference in smoothness is extremely significant, something I attribute to the massive increase in vRam and bandwidth.

As for the heat: I have a oscillating fan blowing at max in front of the case and I could still feel the stream of boiling air coming out into the room. Both cards would spin up to 80% fan speed and still blow out air at 100-110F, quickly ramping up the room temperature to around 90-92F from 81F~. Open the windows you say? It either be would be 100F outside or we'd be in the middle of a tropical storm.

For me, just a decrease in the heat created makes a difference in the world. The increase in performance is a bonus, an awesome, awesome bonus
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