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Is the new 9xxx series compatible with my current PSU mobo? - Page 2

post #11 of 17
Thread Starter 
Quote:
Originally Posted by megajesus View Post

Amps on the 12v rail(s) is the most important issue. Second is if there is a connector compatibility problem, such as only have 6pin when you need 8pin or 20pin when you need 24 pin. But that can be fixed with a simple bridge from spare cable. The two additional pins are both ground in the case of PCIe power connector.

Your PSU is more than enough.
I'm assuming you're guessing. 7950 requires 500W, 7990 requires 750W. logically speaking, 99xx should need 950W or greater but then again AMD is known for GPUs with low relative power consumption. Unfortunately there's no early scoop on the 99xx's power req. I guess we have to wait and see because no one knows really for sure.
Edited by Stealth3si - 8/24/13 at 4:03pm
post #12 of 17
Quote:
Originally Posted by Stealth3si View Post

I'm assuming you're guessing. 7950 requires 500W, 7990 requires 750W. logically speaking, 99xx should need 950W or greater but then again AMD is known for GPUs with low relative power consumption. Unfortunately there's no early scoop on the 99xx's power req. I guess we have to wait and see because no one knows really for sure.

Newer hardware use less power not more

You almost never see newer hardware use more power its almost unheard of
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post #13 of 17
Thread Starter 
Quote:
Originally Posted by shilka View Post

Newer hardware use less power not more

You almost never see newer hardware use more power its almost unheard of
We are actually talking about graphics cards.
post #14 of 17
Quote:
Originally Posted by Stealth3si View Post

We are actually talking about graphics cards.

Yes thats still hardware

They are not going to use more power
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post #15 of 17
Quote:
Originally Posted by Stealth3si View Post


I'm assuming you're guessing. 7950 requires 500W, 7990 requires 750W. logically speaking, 99xx should need 950W or greater but then again AMD is known for GPUs with low relative power consumption. Unfortunately there's no early scoop on the 99xx's power req. I guess we have to wait and see because no one knows really for sure.

 

Before I say anything, I want to point out that this thread is not asking about the 99xx series, but it's asking about the entire 9000 Series.

 

Anyway, the 7990's 750W power supply requirement is due to the fact that the card is two 7970 GHz Edition GPUs on one PCB.

 

Also, don't take the power supply requirements literally because they are for peak-rated PSUs, not continuous-rated PSUs. I don't know of any peak-rated PSUs that are recommendable.

 

So, peak-rated vs. continuous-rated: take the 500W PSU requirement. The typical 500W peak-rated PSU is going to have a +12V capacity of about 360W, or 30A. There are good 400W PSU's that have that +12V capacity (some even have 396W). Then, take the 750W PSU requirement. The typical 750W peak-rated PSU is going to have a +12V capacity of 504-576W (or 42-48A). There are decent 550W PSUs that have a +12V capacity of 504W, and there are decent 650W PSUs that have a +12V capacity of 576W.

 

As for AMD being known for GPUs with relatively low power consumption, that's not what I've found with their most recent offerings. Compare the power consumption card-for-card between AMD and NVIDIA in their latest offerings (excluding the GeForce 700 Series because that will be compared to the retail 8000 Series), and you'll find that NVIDIA's GeForce 600 Series GPUs have a lower power consumption than AMD's 7000 Series, GPU-for-GPU. Just as an example, the 7970 vs. the GTX 680:

 

http://www.guru3d.com/articles_pages/amd_radeon_hd_7970_review,8.html

 

http://www.guru3d.com/articles_pages/geforce_gtx_680_review,9.html

 

Ignore their recommendations for a power supply capacity because they too are talking about peak-rated PSUs. For now, just compare the power consumption differences between these two.

 

However, take a look at the previous generations:

 

http://www.guru3d.com/articles_pages/radeon_6950_6970_review,11.html

 

http://www.guru3d.com/articles_pages/geforce_gtx_580_review,7.html

 

Both consume more power than their newer counterparts (the newer generation requires less power than the older generations), but here we see the GTX 580 requiring more power than the 6970. I won't say that this is predicting the future of how they will compare due to how it seems to be reversing where NVIDIA has lower power consumption, but at least right now this is what we're seeing. However, when the 9000 Series equivalent to the 7990 comes out, I sincerely doubt that they will be recommending a 950W peak-rated PSU! Even if they did, then that would still mean a good quality-made (i.e. continuous-rated) 750W PSU as opposed to the good quality-made 650W PSU that you can use today for a system with one 7990 in it.

 

Therefore, as long as he stays away from the equivalent of the 7990, his PSU should be more than enough, even if he were to get the equivalent to the 7970.


Edited by TwoCables - 8/26/13 at 2:21am
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It's a computer!
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Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (C:) 250 GB Samsung 840 EVO (D:) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
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Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG Filco Majestouch 104-key Cherry MX Blues w/NKRO 
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Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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post #16 of 17
Quote:
Originally Posted by Stealth3si View Post

I'm assuming you're guessing. 7950 requires 500W, 7990 requires 750W. logically speaking, 99xx should need 950W or greater but then again AMD is known for GPUs with low relative power consumption. Unfortunately there's no early scoop on the 99xx's power req. I guess we have to wait and see because no one knows really for sure.

And I know you don't know that the power ratings that AMD and Nvidia for their cards are at best can be construed as suggestions. I don't need to speak on this further as Twocables posted the logic. There is 48 amps~ on your 12v rail for your PSU. You are not a Vulcan, k?

TY Twocables.
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post #17 of 17
Thread Starter 
Quote:
Originally Posted by megajesus View Post

You are not a Vulcan, k? .
I don't know what you're talking about. What's a Vulcan, aside from Star Trek?
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