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[Reddit] RX 480 fails PCI-E specification - Page 4  

post #31 of 1129
Just when I thought AMD was doing something good, they do this. One really can't blame a person who hates AMD.
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post #32 of 1129
Quote:
Originally Posted by ProclusLycaeus View Post

That's not true. The 6-pin power PEG is rated for 75 watts. The 8-pin power PEG is rated for 150 watts.


http://www.tomshardware.co.uk/power-supply-specifications-atx-reference,review-32338-12.html

He's not talking about what they're rated for, he said what they were capable of. The power delivery pins on a 6-pin and 8-pin are identical, an 8-pin just has an extra ground and sense pin.
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post #33 of 1129
Quote:
Originally Posted by ProclusLycaeus View Post

That's not true. The 6-pin power PEG is rated for 75 watts. The 8-pin power PEG is rated for 150 watts.


http://www.tomshardware.co.uk/power-supply-specifications-atx-reference,review-32338-12.html

Yes, but any PSU worth its salt can easily tolerate the 6 pin going over 100W. IIRC JonnyGuru once drew more than 200W from a 6 pin and it didn't melt.

Likewise, I bios modded my 980 Ti to draw 165W from each 8 pin, and I didn't experience any issues even after a Furmark session.
post #34 of 1129
Thread Starter 
Quote:
Originally Posted by FallenFaux View Post

He's not talking about what they're rated for, he said what they were capable of. The power delivery pins on a 6-pin and 8-pin are identical, an 8-pin just has an extra ground and sense pin.

Ah, ok. Either way, this card is out of spec. Some reviewers are showing it's pulling 200 watts while playing Witcher 3. Regardless of how the fire starts and burns down your house, because it is pulling too much power via the PCIe slot or from the 6-pin connector, you will still be homeless. biggrin.gif

Looks like I'll be waiting for the AIB's to buy the kids their Christmas gifts.
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post #35 of 1129
My 8pins on my GPU pull easily 200w each when under overclocked high load. Mobo is probably also over 75w. Its really no issue if you dont have a trash PSU.
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post #36 of 1129
Thread Starter 
Quote:
Originally Posted by magnek View Post

Yes, but any PSU worth its salt can easily tolerate the 6 pin going over 100W. IIRC JonnyGuru once drew more than 200W from a 6 pin and it didn't melt.

Likewise, I bios modded my 980 Ti to draw 165W from each 8 pin, and I didn't experience any issues even after a Furmark session.

Yeah, and I once got a Prius up to 110mph and it wasn't pretty and I'm sure if I blew the engine, Toyota wouldn't honor the warranty.

Again, we aren't talking overclocking, this is just stock speeds here.

Odds are that is why the OC's vary in the reviews ... some PSU's could handle it and they got 15-20% OC's ... others couldn't and that is why they only got 2-5% OC.

This will be a PR mess.

Quote:
Originally Posted by Alex132 View Post

My 8pins on my GPU pull easily 200w each when under overclocked high load. Mobo is probably also over 75w. Its really no issue if you dont have a trash PSU.

Yes, but if you don't have a trash PSU, are you really going to buy an RX 480 and not something with a little more umph? This was a card designed for budget builds and the masses, not people who buy top end PSU's and read OCN all day long.
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post #37 of 1129
Quote:
Originally Posted by ProclusLycaeus View Post

Yeah, and I once got a Prius up to 110mph and it wasn't pretty and I'm sure if I blew the engine, Toyota wouldn't honor the warranty.

Again, we aren't talking overclocking, this is just stock speeds here.

Odds are that is why the OC's vary in the reviews ... some PSU's could handle it and they got 15-20% OC's ... others couldn't and that is why they only got 2-5% OC.

This will be a PR mess.

I'll juice mine as much as I can when they get here. Anyone handy at modding AMD bios?
Quote:
Originally Posted by ProclusLycaeus View Post

Yes, but if you don't have a trash PSU, are you really going to buy an RX 480 and not something with a little more umph? This was a card designed for budget builds and the masses, not people who buy top end PSU's and read OCN all day long.

wave2.gif
Edited by nagle3092 - 6/29/16 at 6:04pm
 
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post #38 of 1129

Sensationalist news is sensationalist. I wonder what some of the other high end cards are pulling from PCI-E slots. People seem to forget about the GTX 480. Maybe using the number 480 is a bad idea period.

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post #39 of 1129
Quote:
Originally Posted by ProclusLycaeus View Post

Yeah, and I once got a Prius up to 110mph and it wasn't pretty and I'm sure if I blew the engine, Toyota wouldn't honor the warranty.

Again, we aren't talking overclocking, this is just stock speeds here.

Odds are that is why the OC's vary in the reviews ... some PSU's could handle it and they got 15-20% OC's ... others couldn't and that is why they only got 2-5% OC.

This will be a PR mess.
Yes, but if you don't have a trash PSU, are you really going to buy an RX 480 and not something with a little more umph? This was a card designed for budget builds and the masses, not people who buy top end PSU's and read OCN all day long.

I'm just pointing out 6 pins are capable of pulling more than 75W, regardless of what they're rated for.
post #40 of 1129
Quote:
Originally Posted by ProclusLycaeus View Post

I'm surprised to see with all the RX 480 talk today, this isn't even in the rumors section.

https://www.reddit.com/r/pcmasterrace/comments/4qg4p7/rx_480_fails_pcie_specification/
If true, this could be a huge issue and may cost AMD a lot of money they don't have. I would imagine to correct the issue, they would either that to intentionally gimp the BIOS, do a recall and put an 8-pin connector on it, or something. Again, if true, this would make the 3.5GB issue the nVidia 970 had look tiny. Especially since there is a potential to cause damage to motherboards.

Uh... The motherboard connection is good for 96 watts peak with 54 sustained, if you don't have a good power supply to operate the 6-pin, you've got MAJOR issues.

An 8 pin is the same as a 6 pin with 2 more grounding wires, it doesn't supply any more power than a 6. Technically a 6 pin equipped card isn't supposed to use PCIE slot power at all. Each PCIE power cable 12v wire (of which there are ONLY EVER 3 on a connector, whether 6 or 8 pin) can handle 6amps at 12v.
Quote:
EDIT: UPDATE FROM AMD:

1) The RX 480 has passed PCIe compliance testing with PCI-SIG. This is not just our internal testing. I think that should be made very clear. Obviously there are a few GPUs exhibiting anomalous behavior, and we've been in touch with these reviewers for a few days to better understand their test configurations to see how this could be possible.

2) Update #2 maybe the OP is confused. There is a difference between ASIC power, which is what ONLY THE GPU CONSUMES (110W), and total graphics power (TGP), which is what the entire graphics card uses (150W). There has been no change in the spec, so I would ask that incorrect information stop being disseminated as "fact."

We will have more on this topic soon as we investigate, but it's worth reminding people that only a very small number of hundreds of RX 480 reviews worldwide encountered this issue. Clearly that makes it aberrant, rather than the rule, and we're working to get that number down to zero.

Basically it looks like Tomshardware is using a damaged testing rig, the 80w draw on the PCIE cable is laughable... that's a single 12v wire on the 6pin's capability. It looks like they have a damaged supply or molex.

I'd place my bets on it being MSi having broken rules. Again.
Edited by prjindigo - 6/29/16 at 6:12pm
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