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[Reddit] RX 480 fails PCI-E specification - Page 86  

post #851 of 1129
Quote:
Originally Posted by Majin SSJ Eric View Post

He's just wrong about the 480! biggrin.gif

I am focusing on the big picture, you seem to be focused on the idea of making the RX 480 your next card biggrin.gif

I'll agree to disagree unless AMD's Computing and Graphics division starts to drastically move towards profitability within the next couple quarters (Q3 & Q4).

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post #852 of 1129
Quote:
Originally Posted by Slomo4shO View Post

I am focusing on the big picture, you seem to be focused on the idea of making the RX 480 your next card biggrin.gif

I'll agree to disagree unless AMD's Computing and Graphics division starts to drastically move towards profitability within the next couple quarters (Q3 & Q4).


What does someone purchasing a 480 have to do with the profitability of the company?

Also this is a 480 PCIE issue thread, seriously you're off on a tangent.
post #853 of 1129
Quote:
Originally Posted by mark_thaddeus View Post

Unfortunate mind of the masses. Just like when the 970 3.5 GB + 0.5 GB memory was an issue. All of a sudden you see a spike of new accounts come up.
The huge difference is with the 970 you are stuck with 3.5 GB + 0.5 GB memory, AMD can do a simple revision and this thing will be fixed or maybe they can fix it with a software update.
post #854 of 1129
Quote:
Originally Posted by VeritronX View Post

I can answer that.. the fermi cards like 480's and 580's would clock down to 50mhz at idle to stop them chewing too much power.. unless your monitor was running higher than 1080p at 60hz or you had multiple monitors connected, then it ran at full voltage and something like 400mhz.. and when I had two of them (even watercooled which improved their efficiency) the idle power consumption of the system would jump up by something like 120W.

TLDR those cards probably pulled 75W per slot when they were powered on, 150 - 300W (2-4 cards) through the motherboard makes 24pins melt.

Mine never melted, ran a pair of GTX 480's at 850mhz core and 2200mhz memory for a long time with multimonitor.

DrFPS is just full of useless crap as always. When that connector burns its due to a poor connection or a 3x/4x GPU system without extra motherboard PEG power connector. Most of us learned that many years ago, though it seems some havent bothered to retain the knowledge.
post #855 of 1129
Quote:
Originally Posted by STEvil View Post

Mine never melted, ran a pair of GTX 480's at 850mhz core and 2200mhz memory for a long time with multimonitor.

DrFPS is just full of useless crap as always. When that connector burns its due to a poor connection or a 3x/4x GPU system without extra motherboard PEG power connector. Most of us learned that many years ago, though it seems some havent bothered to retain the knowledge.

3/4 card setups without the non standard extra power connector was what I was mostly thinking of, but the cards would run at full load voltage all the time with multimonitor so people with unlocked voltages could also run into problems.
Edited by VeritronX - 7/5/16 at 1:45am
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post #856 of 1129
Well it's in german but I think there will be an english recap later.

Summary: Every thing is fine, no PC will burn until you do stupid things.
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post #857 of 1129
Edit: Not needed anymore wink.gif
Edited by The Stilt - 7/5/16 at 6:54am
post #858 of 1129
Quote:
Originally Posted by NihilOC View Post

*25-50% overdraw.


Read the table at the bottom, 50.07% with slight OC and a little over 25% over spec at stock. Where did that 5% figure come from?

So they test with telling the card to draw 30% over what it is supposed to, and then people are surprised the card draws over what it is supposed to?
In other news, it turns out that water is wet.



Quote:
Originally Posted by C2H5OH View Post

It depends where you're looking, but it depends who (as manufacturer) chose to do (implement) what smile.gif
http://forums.evga.com/System-won39t-power-on-when-VGU-has-power-m2377316.aspx

But those sense pins are tied to ground. When it makes a ground connection that is how the GPU knows that there is a connector plugged in. So technically it is a ground connection as well. Unfortunately, AMD chose to connect the 6 pin PCI-E connectors sense pin to the PCI-E SLOT ground as well...
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post #859 of 1129
The guy in your video measures the voltage drop off from Motherboard 12v connector to two PCIe pins, he moves his small selfmade connector to find "worst case" (aka maximum) voltage drop off in this two PCIe pins and puts through as much current as his PSU is capable of.
He starts off with max 40mV drop off @2.6A current (=104mW) goes on to 4.4A and has a 60mV Voltage (=264mW) and finally increases amps to 5.2A (max of his PSU), the voltage dropped a bit probably because the oxide layer was scrapped off when he moved the connector around, he didn't even bother to calc the heat dissipation through the connector with 5.2A

The board he used was a really old one with a Pentium 4 from an office PC, nothing high end there.

He had this thing running with 2.6A for 60 to 90 minutes in the PCIe slot already before he started that video.

His conclusion: Heat dissipation in the connector is so small nothing will happen.

Remember, the 5.2A go through two pins (or 2.6A through each pin).
PCIe spec is 1.1A maximum through each pin.
post #860 of 1129
The fix I have been talking about was tested by w1zzard (TPU). It lowered the power draw from the bus by 10W, on a card which consumed around 162W of power in total. I have no exact details how AMD themselves were thinking to address the issue, however I'm pretty sure that we were working on two completely different fixes. If the fix by AMD manages to reduce the power draw of the card, these two fixes combined together might end up being quite effective indeed. Anyway with the fix I came up with, the power draw from the PCI-E slot will drop below the specifications on stock cards.
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