The Radeon RX 6900/6950 XT Owners Thread.

Godhand007 · 30 Dec 2020 at 15:41

Nugsy88 said:
Have been trying to get a 6800 XT but not seen anything so when the 6900 XT came up for £1100 I couldn't resist! Bought a new PSU with the same order as I'm running a 550w at the moment but that got sent separately and has not turned up yet!

https://i.imgur.com/dEqfu10.jpg

Just and FYI regarding PSU and power with this card, I was going with 375 TGP + ~50W for board components on two pice 8 pins running Port Royal stress test and got an abrupt shutdown. I am using an RM1000i. So everyone, please keep the limits of PSU and power cables in mind especially for cards with only two 8 pin connectors.

Nugsy88 · 30 Dec 2020 at 15:45

I have not been keeping up with PSU supply issues as not needed one only to find pretty much everything I want is out of stock, I've ended up with a EVGA Nova G3 850W which is not what I wanted but only thing I could find.

Godhand007 · 30 Dec 2020 at 15:48

Nugsy88 said:
I have not been keeping up with PSU supply issues as not needed one only to find pretty much everything I want is out of stock, I've ended up with a EVGA Nova G3 850W which is not what I wanted but only thing I could find.

It should not be an issue if the PSU is 80+ certified and you are not using MPT. Normal power limit overclock should be fine. And please use two separate 8 pin cables, that was also causing issues. My 2080ti Zotac AMP didn't have such issues even with just one 8 pin cable (x2). Power consumption on newer generation cards is going overbroad, me thinks.

JediFragger · 30 Dec 2020 at 17:01

Abhishek Shukla said:
Just and FYI regarding PSU and power with this card, I was going with 375 TGP + ~50W for board components on two pice 8 pins running Port Royal stress test and got an abrupt shutdown. I am using an RM1000i. So everyone, please keep the limits of PSU and power cables in mind especially for cards with only two 8 pin connectors.

No problem with my RM650x here, 3080 too tried. 5900X sys

LtMatt · 30 Dec 2020 at 17:20

JediFragger said:
No problem with my RM650x here, 3080 too tried. 5900X sys

Yep, no issues with my 6800 XT using a Seasonic 650W Plat with my 6800 XT overclocked.

That said, It can't quiet handle a 6900 XT overclocked (unless overclocked and undervolted) which was honestly a surprise.

JediFragger · 30 Dec 2020 at 18:14

LtMatt said:
That said, It can't quiet handle a 6900 XT overclocked (unless overclocked and undervolted) which was honestly a surprise.

Wow, good to know though (I'm prob fairly close to the edge, but do run 2620/1.025v so well undervolted)

Overclocked settings also holding now I've set them on a game-by-game basis, thanks for the tip Matt

LtMatt · 30 Dec 2020 at 18:17

JediFragger said:
Wow, good to know though (I'm prob fairly close to the edge, but do run 2620/1.025v so well undervolted)

Overclocked settings also holding now I've set them on a game-by-game basis, thanks for the tip Matt

Pleasure mate, that's how i do it.

Godhand007 · 30 Dec 2020 at 21:40

JediFragger said:
No problem with my RM650x here, 3080 too tried. 5900X sys

LtMatt said:
Yep, no issues with my 6800 XT using a Seasonic 650W Plat with my 6800 XT overclocked.

That said, It can't quiet handle a 6900 XT overclocked (unless overclocked and undervolted) which was honestly a surprise.

JediFragger said:
Wow, good to know though (I'm prob fairly close to the edge, but do run 2620/1.025v so well undervolted)

Overclocked settings also holding now I've set them on a game-by-game basis, thanks for the tip Matt

Just to be clear I have no issues with running my card through normal overclock, i.e power slider full and messing with frequencies and voltages. It's when I punch in extra 75W above that using morepowertool, I get this issue cause the total power consumption goes up to 330W TGP + 49.5W (15% of TGP for power slider) + ~50 W for board components i.e. my GPU is pulling in ~ 430 W which is 55 W above the power limit of 2 * 8 PCIE + 75 W form PIC express slot. If you stand by your PSUs you can try this, I wouldn't recommend it though as you will most probably see PSU failure of one kind or another.

BTW my current oc settings are rock solid with various kinds of stress tests and torture tests being passed with flying colours.
OC settings : 2675 Mhz, 1100mv and 345 max TGP + ~ 50 W for board

Also, those voltages don't adhere to what you set in Radeon settings. It usually will go up to full 1175mv during 3d load.

JediFragger · 30 Dec 2020 at 22:21

Abhishek Shukla said:
It's when I punch in extra 75W above that using morepowertool

Ahhhh right, gotcha.

Godhand007 · 30 Dec 2020 at 22:40

Was able to breach 11k barrier in Port Royal which is the most demanding test in 3d mark 11 with a little more tinkering. Haven't stress tested these settings though. Would like to hear what you guys are getting. I didn't win silicon lottery or could have pushed this more.

https://www.3dmark.com/3dm/55877006?

Looking at around average score in Port Royal for Oced RTX 3080 (stable not just one run), they hover around at 12200 and my stable clocks give me 11000. That 's just a difference of ~11 %, This means DXR is not a lost cause on AMD. They just need more games like Dirt 5 and Godfall to showcase their tech.

LtMatt · 31 Dec 2020 at 13:37

Well, i can safely say that I didn't win the silicon lottery with my 6800 XT or my 6900 XT.

Both top out, bench stable, at around 2680Mhz set in Radeon Software. which is around 2500-2560Mhz in benches.

Godhand007 · 31 Dec 2020 at 14:38

LtMatt said:
Well, i can safely say that I didn't win the silicon lottery with my 6800 XT or my 6900 XT.

Both top out, bench stable, at around 2680Mhz set in Radeon Software. which is around 2500-2560Mhz in benches.

I am in top 20 for score with my card in Port Royal with same clocks as your's. What you need is MPT and power, more power, unlimited power :cool:

. My card only power consumption is at around ~420Ws.

LtMatt · 31 Dec 2020 at 14:41

Abhishek Shukla said:
I am in top 20 for score with my card in Port Royal with same clocks as your's. What you need is MPT and power, more power, unlimited power . My card only power consumption is at around ~420Ws.

That is with MPT and no power limits.

Godhand007 · 31 Dec 2020 at 14:42

LtMatt said:
That is with MPT and no power limits.

Do you have a 3*8 pin pcie card?

LtMatt · 31 Dec 2020 at 14:54

Abhishek Shukla said:
Do you have a 3*8 pin pcie card?

No, I'm using the reference coolers on both.

@Kaapstad updated pic for the roll of honour please.

Godhand007 · 31 Dec 2020 at 15:00

LtMatt said:
No, I'm using the reference coolers on both.

Then how is your PSU not tripping? Max power for 2* 8 pin PCIE connectors is 300 W (rated)+ 75W from mobo. Do a complete Port Royal stress test and tell me your power consumption on GPU-Z. HX1000 is not that different from RM1000I so PSU quality shouldn't be an issue on my end.

LtMatt · 31 Dec 2020 at 15:02

Abhishek Shukla said:
Then how is your PSU not tripping? Max power for 2* 8 pin PCIE connectors is 300 W (rated)+ 75W from mobo. Do a complete Port Royal stress test and tell me your power consumption on GPU-Z. HX1000 is not that different from RM1000I so PSU quality shouldn't be an issue on my end.

I just set the power limits in MPT and was able to draw around 400W peak according to the monitoring overlay. Typically the usage was around 325-350W though for 95% of the 3DMark benches.

I don't have Port Royal and i can't be bothered to pay to unlock it.

Godhand007 · 31 Dec 2020 at 15:26

LtMatt said:
I just set the power limits in MPT and was able to draw around 400W peak according to the monitoring overlay. Typically the usage was around 325-350W though for 95% of the 3DMark benches.

I don't have Port Royal and i can't be bothered to pay to unlock it.

Hmm, that is strange. Maybe PSU can support high power draw for short periods of time. Your total board power at peak must be over 450W. Still without any proper stress test it's a fluke like situation and your OC and subsequently your PC can't be trusted as full 24/7 stable. Since most 3d apps won't come close to that limit you should be good for normal gaming usage.

LtMatt · 31 Dec 2020 at 15:33

Abhishek Shukla said:
Hmm, that is strange. Maybe PSU can support high power draw for short periods of time. Your total board power at peak must be over 450W. Still without any proper stress test it's a fluke like situation and your OC and subsequently your PC can't be trusted as full 24/7 stable. Since most 3d apps won't come close to that limit you should be good for normal gaming usage.

Yep this is only bench stable. I would never try to game like this as I like the fan quiet.

gaming is 2570/2012Mhz, which results in a core speed of 2500Mhz (minimum) in game and a memory speed of 2000Mhz at 60% fan speed which is quiet, this is at 1.087-1.106v.

I find the voltage increases as the temperature rises and it peaks at 1.106v

Godhand007 · 31 Dec 2020 at 15:44

LtMatt said:
Yep this is only bench stable. I would never try to game like this as I like the fan quiet.

gaming is 2570/2012Mhz, which results in a core speed of 2500Mhz (minimum) in game and a memory speed of 2000Mhz at 60% fan speed which is quiet, this is at 1.087-1.106v.

I find the voltage increases as the temperature rises and it peaks at 1.106v

Are you sure about the voltages? Radeon voltage limits are not adhered by the card. You can check in GPU-Z. Also, if performance chasing is not your concern you should reduce the TGP, it is just wasted power unless you really need it at 4k for some power hungry game.
My max voltage is manually set to 1162mv. Fans don't bother me as I am a headphone gamer so let the jet engine rip !