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The Radeon RX 6800 (XT) Owners Thread.

So what are your settings for overclocks guys?

Mine are:

Max frequency: 2600mhz
Voltage: 1000
VRAM: 'fast timing' option 2000mhz
Power limit: 15
Fans about 75%

This seems like I'm hitting the limit of the card, or does anyone have a better setting arrangement?
 
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Space Monkey said:
Normally to do with the amount of power a single cable can safely pull down, wasn't it 150W? Either way it's something that's been around for a long time now, have a Google and see what comes back :)
Click to expand...

Declaration - I have no electrical qualifications

Okay so I spent some time reading.
I found these quite useful
https://www.gpuminingresources.com/p/psu-cables.html
https://www.tomshardware.com/uk/reviews/graphics-card-power-supply-balance,3979-6.html

My main interest was if the cables aren't rated to that power then why include them together specifically labeled as GPU cables and no warning?


The 8 pin PCIe connection is restricted to and can safely carry 150W max. This is a standardised thing.


My corsair PCIe Y cable is rated at 16 AWG.
It's hard to actually find a proper result for what a specific AWG can handle but...
This calculator states AWG is good for 11.9A.
http://circuitcalculator.com/wordpress/2007/09/20/wire-parameter-calculator/
Also here states I can buy a AWG 16 wire that can at least safely handle 10A
http://assets.bluesea.com/files/resources/newsletter/images/DC_wire_selection_chartlg.jpg


It has an 8 pin connection to the PSU which means 3 direct circuits at +12v
if we consider the cable taking the full 2xPCIe demand
300W/12V/3 = 8.33A

That's easy enough for 16 AWG wire to cope without getting hot.

Since by PCIe standardisation the maximum power you can get from 2x8 slots is 300W, providing the connection to the PSU is an 8 pin and not a 6 pin you should be fine to run dual connectors on 16 AWG. With 18 AWG though you're very near the limit of 8.56A, according the the circuitcalculator above, and with a small voltage drop it would push you over; a 3% drop for example would mean 300W/11.64V/3 = 8.59A.

Problems can arise further I think if you plug a y-splitter into the card and theoretically draw the maximum 300W, since you are telling the sensors in the card it can have that much power by having both 8 connections full, yet the y splitter is attached to only a 6 pin PCIe, which therefore only has 2 circuits so essentially 300W/12V/2 = 12.5A, which would make even the 18 AWG hot. Most cards couldn't probably hit 300W draw, or as a constant requirement so the amps would be generally lower than this.

This all could be wrong but that's where I got with it lol
 
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Anyone else got issue with fan profile on the RX 6800?
I can turn on & off zero fan but that it, all other features do not work.
I re-installed AMD software
Turned off Fast reboot (was one solution in AMD forums)

1hv4QzBUsne7wnEa8

https://photos.app.goo.gl/1hv4QzBUsne7wnEa8
 
Apache14 said:
Got hold of an XFX 319 6800XT :D .... this thing is massive

RMn38cnl.jpg


3kHgEWrl.jpg
Click to expand...


Welcome and on TROH.:)


The Roll of Honour.


LogOGKS.png



Date 16/12/2020, Make XFX Speedster Merc 319 6800XT, Apache14, Link
Date 13/12/2020, Make AMD Reference 6800, Rezident, Link
Date 12/12/2020, Make AMD Reference 6800, Bonjour, Link
Date 11/12/2020, Make AMD Reference 6800, gettothechopper, Link
Date 11/12/2020, Make AMD Reference 6800, silk300, Link
Date 10/12/2020, Make AMD Reference 6800, rolypolyman, Link
Date 10/12/2020, Make AMD Reference 6800, Haggisman, Link
Date 07/12/2020, Make AMD Reference 6800, DynamicOCUK, Link
Date 05/12/2020, Make AMD Reference 6800, Jumper118, Link
Date 27/11/2020, Make AMD Reference 6800, TripleT, Link
Date 27/11/2020, Make AMD Reference 6800, Phat-Bud, Link
Date 27/11/2020, Make AMD Reference 6800, Shuflie, Link
Date 27/11/2020, Make AMD Reference 6800, Heofz, Link
Date 27/11/2020, Make AMD Reference 6800, Kill_Phil, Link
Date 26/11/2020, Make AMD Reference 6800XT, LtMatt, Link
Date 25/11/2020, Make AMD Reference 6800XT, Glanza, Link
Date 24/11/2020, Make AMD Reference 6800, sweenEire, Link
Date 24/11/2020, Make AMD Reference 6800XT, BogEyes, Link
Date 23/11/2020, Make AMD Reference 6800, Milo01, Link
Date 23/11/2020, Make AMD Reference 6800, Sgt_Pepper, Link
Date 23/11/2020, Make AMD Reference 6800, BigJack, Link
Date 22/11/2020, Make AMD Reference 6800, phawk, Link
Date 22/11/2020, Make AMD Reference 6800, AfrogoatST, Link
Date 22/11/2020, Make AMD Reference 6800XT, JCLDJB, Link
Date 21/11/2020, Make AMD Reference 6800, Darren_uk, Link
Date 20/11/2020, Make AMD Reference 6800XT, dante6491, Link
Date 19/11/2020, Make AMD Reference 6800XT, Rastan007, Link
Date 19/11/2020, Make AMD Reference 6800XT, Gears, Link
Date 19/11/2020, Make AMD Reference 6800XT, Chrisola, Link
Date 19/11/2020, Make AMD Reference 6800XT, montymint, Link
Date 19/11/2020, Make AMD Reference 6800XT, almoststew1990, Link
Date 19/11/2020, Make AMD Reference 6800, lovelyhead, Link




To get on the Roll of Honour all you have to do is post a pic with your user name on it of your Radeon RX 6800 (XT).​
 
Joining in with an XFX 6800XT Merc 319 guys. It's awesome never gone above 1300RPM fans a 75C so far


I made a comparison video with my GTX1080 what it replaced:

 
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