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Author Topic: [AVL NOW] Countdown to radeon 7990  (Read 11068 times)
goxed
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July 30, 2012, 11:20:12 AM
 #1

Available for Sale @ Newegg
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131479



It's launched guys!

http://www.techpowerup.com/171009/PowerColor-Devil-13-HD-7990-Revealed.html

http://www.bit-tech.net/news/hardware/2012/07/30/amd-hd-7990-leak/1

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July 30, 2012, 12:46:41 PM
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Good god,  4x 6pin power plugs!?!?  What a power hog this is gonna be.  Roll Eyes

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July 30, 2012, 04:12:24 PM
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Good god,  4x 6pin power plugs!?!?  What a power hog this is gonna be.  Roll Eyes

Huh?

Most normal dual GPU cards feature a 2x8 pin power connector arrangement for input of 150 W each (official, they handle more)

This card has 4x6 pin power connector for input of 75W each (official, they handle more). Notice the math there?

The difference is in how it allows handling of incoming power, the power circuitry is unique to this card. These four 6-pin connectors give the card a multiphase power regulation, which is divided into three groups.

So to say it's a power hog based on it's connector style is wrong.

It will undoubtedly be more power hungry than a 690 from the green team, but it will also be faster. This has nothing to do with how many power plugs featured.
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July 31, 2012, 08:03:33 PM
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Wondering, would mining on it profitable at release date?

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July 31, 2012, 09:35:32 PM
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I have been waiting for these things since march...  i have SeaSonics and mobo ready...  but to waste 4 of my precious gpu power connectors on one card... NO THANKS.     i hate molex connectors.


bummer.......   Angry

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July 31, 2012, 09:37:45 PM
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I have been waiting for these things since march...  i have SeaSonics and mobo ready...  but to waste 4 of my precious gpu power connectors on one card... NO THANKS.     i hate molex connectors.


bummer.......   Angry
Quite so. I can't figure it out, it seems to me that the most logical thing would be 2x 8-pin: 150w each, = 300 watts total, whereas 3x 6-pin: 75w each, = 225 watts total. Huh

Do the PCIe bridge chip and the memory really need as much power as both the GPUs combined? Huh

EDIT: Derp, 4x 6-pins, not 3. Still it works out to the same wattage as 2x 8-pins.

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August 01, 2012, 12:55:31 AM
 #7

I have been waiting for these things since march...  i have SeaSonics and mobo ready...  but to waste 4 of my precious gpu power connectors on one card... NO THANKS.     i hate molex connectors.


bummer.......   Angry
Quite so. I can't figure it out, it seems to me that the most logical thing would be 2x 8-pin: 150w each, = 300 watts total, whereas 3x 6-pin: 75w each, = 225 watts total. Huh

Do the PCIe bridge chip and the memory really need as much power as both the GPUs combined? Huh

EDIT: Derp, 4x 6-pins, not 3. Still it works out to the same wattage as 2x 8-pins.

The PCIe bridge chip should use barely any power. The RAM should not use anywhere near the GPU's lol.... that would be madness

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August 01, 2012, 01:02:43 AM
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I have been waiting for these things since march...  i have SeaSonics and mobo ready...  but to waste 4 of my precious gpu power connectors on one card... NO THANKS.     i hate molex connectors.


bummer.......   Angry
Quite so. I can't figure it out, it seems to me that the most logical thing would be 2x 8-pin: 150w each, = 300 watts total, whereas 3x 6-pin: 75w each, = 225 watts total. Huh

Do the PCIe bridge chip and the memory really need as much power as both the GPUs combined? Huh

EDIT: Derp, 4x 6-pins, not 3. Still it works out to the same wattage as 2x 8-pins.

The PCIe bridge chip should use barely any power. The RAM should not use anywhere near the GPU's lol.... that would be madness
Exactly. And yet, some are postulating that the necessity of 4 connectors is to provide better power or something, and that some of them would be dedicated to the RAM and others to the GPUs. Madness.

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August 01, 2012, 01:22:38 AM
 #9

Maybe has an 8-phase PSU.
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August 01, 2012, 02:08:41 AM
 #10

It's a three group multiphase power regulation...

Not for MORE power, for better power, these chips will clock like crazy. The voltage input on these chips will be very stable.

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August 01, 2012, 02:22:41 AM
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It's a three group multiphase power regulation...

Not for MORE power, for better power, these chips will clock like crazy. The voltage input on these chips will be very stable.



still, dont think it will be worth 4 pci cables...  im not even sure win7 will load 4 of these monsters

16pci plugs..what a clusterfuk

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August 01, 2012, 03:05:37 AM
 #12

+1

"Damn you AMD you designed it to be MORE stable for overclocking but now I have to use these 8 pin to 2x6 pin adapters, YOU BASTARDS!"

It's a three group multiphase power regulation...

Not for MORE power, for better power, these chips will clock like crazy. The voltage input on these chips will be very stable.



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August 01, 2012, 11:49:42 AM
 #13

Wouldn't it be better if they stopped worrying so much about overclockability and all the caveats that entails and just made a fast card out of the box?

Maybe even make it run off of two 8pin cables, that would be so cool. Roll Eyes Roll Eyes

Tired of substandard power distribution in your ASIC setup???   Chris' Custom Cablez will get you sorted out right!  No job too hard so PM me for a quote
Check my products or ask a question here: https://bitcointalk.org/index.php?topic=74397.0
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August 01, 2012, 02:56:21 PM
 #14


yeah, it'll finally beat the 5970 in gaming performance

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August 01, 2012, 03:00:22 PM
 #15

Doesn't powercolor's card have 3x8-pin PCI-e?

You could run 3 of those off an enermax platimax without any additional connectors... would be good for something like 3.7Ghash.
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August 03, 2012, 02:27:40 AM
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Wouldn't it be better if they stopped worrying so much about overclockability and all the caveats that entails and just made a fast card out of the box?

Maybe even make it run off of two 8pin cables, that would be so cool. Roll Eyes Roll Eyes

It is a fast card out of the box...

Here's the "thing". In order to comply to the PCI-e official specifications, the card has to remain within a 300W (or less) power envelope out of the box. So when you take it out of the box and plug it in it's fast, but only 300W (or less) worth of fast. That means if Joseph Ding Dong with his shiny whitebox home built PC and FANCY Diablotek 650 W Firestarter (err I mean power supply) plugs in this card, it might actually work without blowing up in flames. Might (It's a diablotek after all) Conforming to the PCI-e spec means these things can be certified for use in OEM machines like Dell and HP etc...

Now Jo Over Clocker with his 80 plus Gold rated 1500W monster plugs in two of these beasts and decides to feed them every watt they can handle to the tune of 450+ watts a piece and squeeze every single pixel out of them... well the cards are wired up for that too... beyond the PCi-e spec.

A lot of big PSU's have multiple rails and it's nice to be able balance something like this across them.

tl dr: the card is made for gamers and gamers rigs we are a secondary market only.
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August 03, 2012, 03:04:39 AM
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I guess my sarcastic point was that for the costs associated and the grief in engineering they should have just made a more 'normal' dual gpu card and be damned about all the extra bells and whistles for super overclockers as they hold even less market share than miners do.

Tired of substandard power distribution in your ASIC setup???   Chris' Custom Cablez will get you sorted out right!  No job too hard so PM me for a quote
Check my products or ask a question here: https://bitcointalk.org/index.php?topic=74397.0
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August 03, 2012, 03:09:14 PM
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I guess my sarcastic point was that for the costs associated and the grief in engineering they should have just made a more 'normal' dual gpu card and be damned about all the extra bells and whistles for super overclockers as they hold even less market share than miners do.

That's an interesting point. These particular cards are the top of the line extreme items and will carry hefty price tags. This kind of mark up demands superior engineering.

IF board partners (like Powercolor or Sapphire etc) wanted to make 7870x2 , 7950x2 or even simpler 7970x2 etc... then they COULD. It's entirely within their scope and they'd do it if there was a market that they could latch onto. I'd say by the absence of such products, there is little market that they feel they could capture outside of the existing product lines.

The assertion that more people mine than overclock doesn't ring true with me in any case. The big forums like H and Xtremesystems and so on definitely add up to more enthusiasts than BTC miners.

So a nice dual card that undervolts and is easy to manage could be aimed squarely at the miners, but I think dedicated mining hardware from places like BFL is showing that this particular ship has sailed.

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August 03, 2012, 05:42:03 PM
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Don't get me wrong, I am not asserting that there are more miners than 'general' overclockers, but I am saying that there are probably more miners than 'super' overclockers that know what multiphase power is going to get them and how best to turn that into a competitive advantage for the benchmarks. (as I don't think they actually play games like that)

Your general enthusiast will probably OC their card a bit for better framerates and some e-peen but they will probably not be able to fully utilize these new multiphase power setups to their upmost as 1) they don't care and 2) they are not going to mod their card aside from maybe a water block.

I fall into this 'general' overclocker family as I will OC my card(s) for better framerates but I will probably not utilize "three group multiphase power regulation" to its fullest ever. I am sure I will not want to deal with the extra heat and noise that OCing my card to the roof will avail me. Most games its diminishing returns anyway.

Tired of substandard power distribution in your ASIC setup???   Chris' Custom Cablez will get you sorted out right!  No job too hard so PM me for a quote
Check my products or ask a question here: https://bitcointalk.org/index.php?topic=74397.0
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August 04, 2012, 09:45:45 AM
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Don't get me wrong, I am not asserting that there are more miners than 'general' overclockers, but I am saying that there are probably more miners than 'super' overclockers that know what multiphase power is going to get them and how best to turn that into a competitive advantage for the benchmarks. (as I don't think they actually play games like that)

Your general enthusiast will probably OC their card a bit for better framerates and some e-peen but they will probably not be able to fully utilize these new multiphase power setups to their upmost as 1) they don't care and 2) they are not going to mod their card aside from maybe a water block.

I fall into this 'general' overclocker family as I will OC my card(s) for better framerates but I will probably not utilize "three group multiphase power regulation" to its fullest ever. I am sure I will not want to deal with the extra heat and noise that OCing my card to the roof will avail me. Most games its diminishing returns anyway.

The heat is a boon in the winter, considering most "portable space heaters" run around 1500 watts, a PC can easily replace one in a cold room.

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