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AMD RX 480 Fails PCI-E Specification

Kaapstad said:
My motherboard is quite happy running Trifired RX480s so if a M/B can not run a single RX480 it does raise a few questions about the motherboard.

I hate to think how some of these motherboards would get on if they ran power hungry Kingpins or similar.:D
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I think I just let a little bit of wee out in sadness..
 
shankly1985 said:
Believe it happens on every GPU the problem here is the crashing depends on the motherboard quality. Cheap motherboard seems to be effected more than more premium quality products.
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I don't know what you mean but the 480 is the only known cards that consistently pull more than 75w average from the motherboard under normal gaming conditions
 
Rroff said:
Normally though those Kingpins, etc. would be pulling that extra load from the additional connectors not the PCI-e socket itself. Even heavily overclocked the draw from the socket is usually under 55 watt on most GPUs.
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When you are using 4 of them you still have to beef up the power to the motherboard with extra connectors.
 
D.P. said:
I don't know what you mean but the 480 is the only known cards that consistently pull more than 75w average from the motherboard under normal gaming conditions
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Not getting into this back and forth. But I have seen and watched videos showing they is more GPUs that do pull more power. It gets even worse the more you overclock.

YouTube is your friend right now DP.
 
Kaapstad said:
When you are using 4 of them you still have to beef up the power to the motherboard with extra connectors.
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Yup, I remember those connectors started appearing in 2009 with X58 and more so later when the GTX 480 came out.

There were quite a few "cheap" motherboards where the ATX connector melted the 12v pins if you had two or more GTX 480's in; and your motherboard didn't have those extra molex connectors to help balance the power load.
 
shankly1985 said:
Not getting into this back and forth. But I have seen and watched videos showing they is more GPUs that do pull more power. It gets even worse the more you overclock.

YouTube is your friend right now DP.
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Pull more power than what? are you talking the 300 watt thing?
 
Got a link? all the ones I've seen tested so far when people claimed they draw over spec from the lanes showed around 35 watt at stock and upto 55 watt overclocked. (Other than spikes which are within regulation).
 
Rroff said:
Problem is not everyone builds in sufficient margins - unfortunately seems that the better made boards are capable of ridiculously more current than you are ever likely to encounter while the basic 1oz boards are cutting it fine.



Excess current generates more heat which can over time degrade most electronics including interconnects - there is quite a range between nominal current conditions and a short circuit and likewise a range in the effect from long term degradation to burn up in a fire.



I believe MXM is a bit different doing more of the power conversion off board? with around 7 connectors spreading the load over 1 or 2 high voltage pins and several low voltage pins - most of the core is fed from what 4-6x 1.8v rather than the one 12v connection.
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MXM is fed a lower voltage yes but that only increases the current that the connector has to deal with.
 
Meaker said:
MXM is fed a lower voltage yes but that only increases the current that the connector has to deal with.
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But it is split over a load of connections not just 3 as in the case of a PCI-e x16 slot off the top of my head there is 1 high voltage lane (2 on some designs), 2x 5v or something? (but they are low amperage) and 4-6x high amperage connections - depending on revision.
 
shankly1985 said:
Not getting into this back and forth. But I have seen and watched videos showing they is more GPUs that do pull more power. It gets even worse the more you overclock.

YouTube is your friend right now DP.
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Can you provide any links? I'v not found any card to have an average draw anything close to what the 480 is doing.
A lot of uninformed people made claims about 750Ti, 960s extra that have all been widely dis-proven. Heck, even the graphs from Toms Hardware people were posting as proof actually showed the complete opoiste of what they were claiming
 
Failure of AMD fanboys to see facts is strong in this thread.

AMD ****ed up and have admitted it. The consequences for those with the 480's is unknown at this time.

nVidia ****ed up too with the 970, fact and they paid for it.
 
Are them extra pcie power connectors only needed for 3way+ or summat? I was running 2x290x cards over 1.4v for months before i realised i hadnt plugged that back in. Im guessing its not needed for only 2 cards.
 
BluD said:
Are them extra pcie power connectors only needed for 3way+ or summat? I was running 2x290x cards over 1.4v for months before i realised i hadnt plugged that back in. Im guessing its not needed for only 2 cards.
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Depends on the cards, and motherboard, how much they draw, and how well the MB can handle that draw without the extra power.
 
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