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[Reddit] RX 480 fails PCI-E specification - Page 50  

post #491 of 1129
This is my personal belief:
Quote:
Originally Posted by magnek View Post


I agree, instead of binning and throwing away who knows how many chips that fail validation, they probably just slapped on a one-size-fits-all (over)voltage, which seems to have backfired tremendously.

I mean, if by undervolting you gain performance while lowering power draw at the same time, RX 480 could've not only looked better in reviews (decisive lead over 970, very close to stock 980), but there likely wouldn't have been an issue with pulling too much power over the PCIe slot. Imagine how much better the launch could've gone then.

As an aside: Intel had the exact same issue with mobile Haswell CPUs. My 4900MQ was a blast furnace at stock voltage, and it wouldn't even run full turbo but 100 MHz less because it was constantly pushing against its TDP limit. I undervolted by 80mV (yes, 80mV), shaved off 7C, and the thing now runs full turbo all the time. But the real kicker for me, was that the stock voltage was enough to get a stable 4GHz OC on my 4900MQ (default turbo = 3.6 GHz). Intel seriously dun goofed there.

Before anyone tells me my statement about Intel is invalid because "hurr durr sample size = 1 trollololol fail", do a search around the web and you'll see that being able to undervolt mobile Haswell CPUs and being able to maintain stability is a pretty general phenomenon. FWIW I also had a 4700MQ and 4800MQ to play with, the 4700MQ could be undervolted by 60mV, and the 4800MQ did 50mV.
Edited by magnek - 7/1/16 at 3:21pm
post #492 of 1129
Quote:
Originally Posted by magnek View Post


Fair enough. I'm just basing my assumptions on what we know about first gen GCN, specifically 270X (Pitcairn XT) and 290 (Hawaii Pro). 290 (non-X) was literally double the specs of 270X chip-wise, and it only ended up being ~1.6x the performance of 270X.

 

It's a sensible way to approach the question, no doubt about that. I remain hopeful that they've learned from the past and will address some of their architectural imbalances with Vega but it's definitely not the betting proposition. That said, I don't invest any emotion in these kinds of hopes and dreams like some of the extreme fan-people do so when the inevitable disappointment strikes I never feel angry or embittered, just a little 'that's too bad'. :D 

 

Quote:
Originally Posted by magnek View Post

This is my personal belief:
 
I'm inclined to think you're on the right track with that. Taken in combination with a chip meant to address mobile, console, and have some leftover juice for desktop, it would explain the efficiency, weird performance, and randomly occurring issues like PCIe overdraw.
     
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Hard DriveHard DriveHard DriveHard Drive
Biostar M200-240 240GB m.2 SATA SSD (Win) Samsung 850 Pro 256GB SSD (Linux) SanDisk Ultra II 480GB SSD (Games) Seagate 2TB SSHD (Storage) 
Optical DriveCoolingCoolingCooling
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Gentle Typhoon 120mm x4 Ubuntu 17.10 w/ custom kernel Windows 10 Pro Pixio PX277 27" 1440p 144Hz DP-Adaptive Sync w... 
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post #493 of 1129
Heh after Intel's "4790K will hit 5GHz on air we promise!!!!111111oneone" and AMD's "Fury X = overclocker's dream", I've learned to only believe it when I see it.

Probably why I wasn't too let down about 480 performance-wise, but more about its efficiency.
post #494 of 1129
Quote:
Originally Posted by EightDee8D View Post

Nope, they said 6tflops of GPU power.

You're right, I was talking 'bout PS4 Neo, as I'm thinking that P10 was designed for it.

Xbox Scorpio is 6 TFLOPS GPU

I'm using c2h5oh right now, so I ask to be forgiven... tongue.gif
post #495 of 1129
Quote:
Originally Posted by SuperZan View Post

drunken.gifcoolsmiley03.png
cheers.gif

As to the topic, I now believe that either P10 was not a desktop designed part or AVFS has some serious bug.
post #496 of 1129
Quote:
Originally Posted by C2H5OH View Post

You're right, I was talking 'bout PS4 Neo, as I'm thinking that P10 was designed for it.

Xbox Scorpio is 6 TFLOPS GPU

I'm using c2h5oh right now, so I ask to be forgiven... tongue.gif

Took me a minute but lachen.gifapplaud.gif

Although as a master chemist I suggest you use the slightly more correct CH3CH2OH formula teaching.gif
post #497 of 1129
Quote:
Originally Posted by KarathKasun View Post

And you skipped the part where I said that you probably arent going to put a load balancing circuit in a mid range GPU due to cost.

You mean this?
Quote:
but they would likely not fit into the budget of this board

I think neither one of knows so this speculating is just that. Do me a favor, if you see the answer to this pm me. I don't have time to keep an eye on this but would like to see the results.
post #498 of 1129
Quote:
Originally Posted by magnek View Post

Took me a minute but lachen.gifapplaud.gif

Although as a master chemist I suggest you use the slightly more correct CH3CH2OH formula teaching.gif

c2h50h I learned as a kid in Chemistry class and there is a very funny saying in Bulgarian related to it, but unfortunately...if I translated it will all be lost smile.gif

Edit:
But you're absolutely right, though....'bout the forumla, I mean formola, formula...damned it!
Edited by C2H5OH - 7/1/16 at 3:37pm
post #499 of 1129
@Mahigan is there a possibility, that AVFS is broken, screwing with power saving options in Polaris 10 or giving wrong power measurements?
post #500 of 1129
Quote:
Originally Posted by EightDee8D View Post

Basically all p/w improvements have came from finfet 14nm, architecture did jack. i have 0 faith in vega now.

only way they can catch nvidia is by ditching that GCN.
Vega 10 will be clocked lower, with a high quantity of SPs, like the trend is with GCN lower clock speed takes much less energy and HBM2 will bring down power consumption even further
Quote:
Originally Posted by magnek View Post

Not gonna lie, I've given up on Vega after 480's launch. frown.gif
Would you speculate performance of a enthusiast grade card like a R9 Fury X(Vega 10 Replacement) with the performance of the R9 280(X)(Rx 480)?
Edited by PontiacGTX - 7/1/16 at 3:54pm
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