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Poll: ** The AMD VEGA Thread **

On or off the hype train?

  • (off) Train has derailed

    Votes: 207 39.2%

  • (on) Overcrowding, standing room only

    Votes: 100 18.9%

  • (never ever got on) Chinese escalator

    Votes: 221 41.9%
  • Total voters
    528
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Steampunk said:
AMD's problem is that their livestreams are boring because their presentations are boring. They need to have a bit of showmanship and make it more entertaining, give actual useful information instead of just a few people with no skills in public speaking flapping their mouths and saying nothing of any consequence.
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They need to get some t|ts up on the stage that'll do it. :) :p (and i'm not talking about Lisa Su's)
 
FoxEye said:
Errrrrr, what?
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Lol. There is a small theoretical benefit if I remember my physics properly, electrons more excited at higher temperatures resulting in higher resistance (probably need someone who knows their stuff).

It's hilarious someone has managed to convince him that it is meaningful in any way.
 
muon said:
Lol. There is a small theoretical benefit if I remember my physics properly (probably need someone who knows their stuff).

It's hilarious someone has managed to convince him that it is meaningful in any way.
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Semiconductors act differently at different temperatures in regard to conductance, switching frequency, etc. but yeah in respect to watercooling you aren't going to change the properties in any way significant to power consumption - at the very least nothing like any level that would offset the additional power use of the pump.
 
FoxEye said:
Errrrrr, what?
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the general understanding is that the temperature is a measure of kinetic energy...
and kinetic energy is basically a scalar quantity.. so all particles in a system can be moving in random directions but still the energy can add up

so you'd need additional external energy to order the flow in the system thats behaving randomly at high energy levels - the basic intuition behind it.. rest can be covered under an introductory course in statistical mechanics :D
 
Lowering temperature won't lower power consumption in any meaningful way directly.

However, indirectly, if you can lower temperature enough to significantly reduce leakage, then you will likely be able to reduce the voltage supplied to the chip, which WILL reduce power consumption in a meaningful way, which in turn will further reduce temperature etc etc.

Until people have exhaustively over and underclocked a range of Vega chips, we're not going to know much, though. The launch, and likely even initial reviews won't tell us either.
 
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muon said:
No chance it uses less power than the air cooled version either though. It will be on far higher volts given the massive clock difference.
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Rroff said:
Semiconductors act differently at different temperatures in regard to conductance, switching frequency, etc. but yeah in respect to watercooling you aren't going to change the properties in any way significant to power consumption - at the very least nothing like any level that would offset the additional power use of the pump.
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"Increasing the fan RPM to 51dBA and sustaining about 80-83C on the core, we see that power consumption is around 26A from the PSU, whereas the Hybrid card’s power consumption – with temperatures around 43C – sits closer to the 23.4A mark. This is also largely unchanging from the start of the test to the end, while the air-cooled card scales from about 22A to 26A over the period of the test. After the relatively short burn-in period, the air-cooled card is drawing an additional 2.6A over the hybrid mod, resulting in a power leakage of 31W due to heat."

From: http://www.gamersnexus.net/guides/2986-amd-vega-hybrid-mod-results-overclocking-liquid-vs-air/page-2

Does make a small difference, but yeah the pump is probably going to eat into that reduction in power consumption.
 
Toss3 said:
"Increasing the fan RPM to 51dBA and sustaining about 80-83C on the core, we see that power consumption is around 26A from the PSU, whereas the Hybrid card’s power consumption – with temperatures around 43C – sits closer to the 23.4A mark. This is also largely unchanging from the start of the test to the end, while the air-cooled card scales from about 22A to 26A over the period of the test. After the relatively short burn-in period, the air-cooled card is drawing an additional 2.6A over the hybrid mod, resulting in a power leakage of 31W due to heat."

From: http://www.gamersnexus.net/guides/2986-amd-vega-hybrid-mod-results-overclocking-liquid-vs-air/page-2

Does make a small difference, but yeah the pump is probably going to eat into that reduction in power consumption.
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Pump in those AIOs probably draws 5-8W tops. Certainly not 30W.
 
Toss3 said:
"Increasing the fan RPM to 51dBA and sustaining about 80-83C on the core, we see that power consumption is around 26A from the PSU, whereas the Hybrid card’s power consumption – with temperatures around 43C – sits closer to the 23.4A mark. This is also largely unchanging from the start of the test to the end, while the air-cooled card scales from about 22A to 26A over the period of the test. After the relatively short burn-in period, the air-cooled card is drawing an additional 2.6A over the hybrid mod, resulting in a power leakage of 31W due to heat."

From: http://www.gamersnexus.net/guides/2986-amd-vega-hybrid-mod-results-overclocking-liquid-vs-air/page-2

Does make a small difference, but yeah the pump is probably going to eat into that reduction in power consumption.
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I'd like to see some more tests of that.

EDIT: As below wonder if the fans/watercooling were included in the calculations in the same way.
 
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Toss3 said:
"Increasing the fan RPM to 51dBA and sustaining about 80-83C on the core, we see that power consumption is around 26A from the PSU, whereas the Hybrid card’s power consumption – with temperatures around 43C – sits closer to the 23.4A mark. This is also largely unchanging from the start of the test to the end, while the air-cooled card scales from about 22A to 26A over the period of the test. After the relatively short burn-in period, the air-cooled card is drawing an additional 2.6A over the hybrid mod, resulting in a power leakage of 31W due to heat."

From: http://www.gamersnexus.net/guides/2986-amd-vega-hybrid-mod-results-overclocking-liquid-vs-air/page-2

Does make a small difference, but yeah the pump is probably going to eat into that reduction in power consumption.
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From the video I believe they are comparing an air cooled card where the fans are powered by the card (so will show up in power draw) against an AIO externally powered.

31W is way too much simply as a consequence if temperature.

What would have been smarter is to just run the AIO card at different fan speeds and then measured the power draw difference.

Increasing the fan RPM to 51dBA and sustaining about 80-83C on the core, we see that power consumption is around 26A from the PSU, whereas the Hybrid card’s power consumption – with temperatures around 43C – sits closer to the 23.4A mark. This is also largely unchanging from the start of the test to the end, while the air-cooled card scales from about 22A to 26A over the period of the test. After the relatively short burn-in period, the air-cooled card is drawing an additional 2.6A over the hybrid mod, resulting in a power leakage of 31W due to heat.
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Flawed test imo. Not like for like.
 
five8five said:
A Displayport to DVI adaptor is included with the Special Edition Air version so would expect the Water version to be the same. See the unboxing vid (4:10 min)

Obviously it doesn't mean the standard versions of the card include it.
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FeQGm85.png


Behold. I dont think its a big deal to include that in any edition. Displayport is unlimited so the dvi output then would not be capped in any way ?

The holocube is absolutely tiny but that is pretty unique, I can see people paying 50 extra if thats possible

The hype tram is back on??
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http://i.imgur.com/hyqdo2q.gifv

The three games on the horizon that interest me are new Metro
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Supposedly Star Citizen is releasing a playable version around now but I'd really dislike to be waiting like them
 
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