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AMD RX 6800 RT cores defective or PSU problem?

RT hammers any card.

On my 3070 ti, without RT i almost never get more than 200 watts. With RT I can be pulling 300 wats like it's nothing. And these numbers are not the spikes, the spikes are much much higher.
On AMD I suspect its the same or even worse.

The power comsumption increases, the spikes also increase.
For reference a 3080 can have +500 watts spikes, i can almost bet the 6800xt has similar numbers, if the PSU doesnt know or cant deal with those spikes you'll have issues.
In my humble opinion thats what happening here. If the card was faulty you wouldn't be running games and just happen to crash on RT. All you said leads to believe its a PSU problem.
 
Looking at a couple of PSU's



open to other suggestions, budget is £100

lawood said:
RT hammers any card.

On my 3070 ti, without RT i almost never get more than 200 watts. With RT I can be pulling 300 wats like it's nothing. And these numbers are not the spikes, the spikes are much much higher.
On AMD I suspect its the same or even worse.

The power comsumption increases, the spikes also increase.
For reference a 3080 can have +500 watts spikes, i can almost bet the 6800xt has similar numbers, if the PSU doesnt know or cant deal with those spikes you'll have issues.
In my humble opinion thats what happening here. If the card was faulty you wouldn't be running games and just happen to crash on RT. All you said leads to believe its a PSU problem.
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it happens in doom at 60fps with vsync on also, it won't be hitting anything near crazy numbers like that but I am going to buy a PSU anyway to either rule it out or eat some humble pie
 
that corsair model is pretty damn good.

Cant say I know the evga model.

Marcus L said:
it happens in doom at 60fps with vsync on also, it won't be hitting anything near crazy numbers like that but I am going to buy a PSU anyway to either rule it out or eat some humble pie
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believe, even if by some miraculous reason the PSU isnt the problem you're doing yourself a favor by swapping PSU's anyway.

You are bound to find problems nevertheless with that PSU paired with such a strong GPU, it's not a case of if, its a case of when.
 
I have ordered the Corsair RM750x Shift, will be here tomorrow
 
10 year warranty PSU with pretty stellar reviews.
Compare that to the 3 year warranty on your current PSU. :toast:
 
lawood said:
10 year warranty PSU with pretty stellar reviews.
Compare that to the 3 year warranty on your current PSU. :toast:
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TBF I have had this PSU for nearly 5 years so I think I have done pretty well out of it up until now
 
Normally, PSUs last for 2+ decades. But yeah, having nothing exploded in 5 years with such a low-tier one is a sign of good luck.
 
Marcus L said:
TBF I have had this PSU for nearly 5 years so I think I have done pretty well out of it up until now
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You should play the lottery my guy, you clearly like to gamble.
:D
 
Marcus L said:
Happens in doom eternal even at around 100w max GPU load so I don't think it's the PSU even though it's not ideal, this is only with RT on, without RT it can run any game maxed out and 100% 200w+ and never crashes, having googled it there are other cases where the GPU is stable maxed out and regardless of the game, crashes with RT on
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It probably spikes under RT loads more so than under raster, and that spike trips your PSU.

Same wattage will likely run fine on an RDNA3 card. That's worth a test. Testing this with another RDNA2 >200W card isn't doing yourself any favors.

Toothless said:
Or the power supply trips on those spikes which sure, the OCP could be tripping but this isn't the case on better built units. With OP's issue it's most likely junk unit giving junk power however there is no harm in getting a quality unit in case they want to upgrade down the road.

With plenty of data out there where many low end units, and some decent ones still not able to hold up.
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Its very hard to think of it being anything else wrt the PSU, seeing as it does other loads fine.

lawood said:
You should play the lottery my guy, you clearly like to gamble.
:D
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That PSU wasn't bad at all. It offers its stated wattage on the 12V and is within spec. Its not resilient enough for RDNA2. I'd put the blame there rather than on the PSU. An 800W version of this would have been fine most likely. Ofc, its not top tier. But neither is a Corsair CX, but its still fine for 90% of all builds.
 
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Vayra86 said:
That PSU wasn't bad at all. It offers its stated wattage on the 12V and is within spec. Its not resilient enough for RDNA2. I'd put the blame there rather than on the PSU. An 800W version of this would have been fine most likely.
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Just don't...

Its actually one of the worst PSU's money can buy.
Tier D (the worst tier) on LTT tier list and low priority unit on top of that (being D tier isnt enough :wtf:).
It's literal dogshit.
 
lawood said:
Just don't...

Its actually one of the worst PSU's money can buy.
Tier D (the worst tier) on LTT tier list and low priority unit on top of that.
It's literal dogshit.
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And yet it ran fine for many years, they aren't in the news exploding left and right, and they cost half of the replacement that was bought now.

I wouldn't do it myself, but I can see why people buy them. These aren't ticking time bombs, we should not exaggerate so much.
 
Your money, your components. But don't go around saying its a good PSU or even an acceptable PSU.

Factually it's not.
And btw, forum etiquette indicates to not quote the latest post posted if you are responding directly to that post, a small pet peeve. :toast:
 
Vayra86 said:
That PSU wasn't bad at all. It offers its stated wattage on the 12V and is within spec. Its not resilient enough for RDNA2. I'd put the blame there rather than on the PSU. An 800W version of this would have been fine most likely. Ofc, its not top tier. But neither is a Corsair CX, but its still fine for 90% of all builds.
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Exactly, the 6800 spikes to 344w maximum according to TPU, and yes it is not complete garbage that advertises 600w and delivers 400w on the +12v rail, granted it is a budget orientated unit from EVGA though it has done fine and powered all manor of GPU's without any issues including a 6700xt before the 6800 and a 2080 super. I did know I was getting close to it's limits with this GPU purchase and as mentioned previously a PSU upgrade was always part of my plan, just it is now sooner rather than later, though truth be told if I didn't have an issue with the GPU/PSU I guess I would have no reason to upgrade it anyway

Anyway PSU is ordered shall see what happens when it arrives regarding the GPU, I will gladly eat my words if it is a PSU issue as I don't mind admitting when I am wrong, I am still inclined to think it isn't until I can prove otherwise
 
Marcus L said:
I have ordered the Corsair RM750x Shift, will be here tomorrow
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The RM750x is a great PSU, you need only to be careful of the side connector position on the Shift.
 
Wait, they put the connectors on the side now?
it's the same internals as the non shift version? Hopefully i didn't give a bad recommendation.

I need to get on with times I guess.
 
wNotyarD said:
The RM750x is a great PSU, you need only to be careful of the side connector position on the Shift.
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Lot's of room in my 4000D case, would be a bit embarrassing if it wouldn't go into one of their own cases :laugh:
 
lawood said:
Wait, they put the connectors on the side now?
it's the same internals as the non shift version? Hopefully i didn't give a bad recommendation.

I need to get on with times I guess.
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Yeah, they have the RM-x and RM-x Shift series. The Shift has the same internals, so the recommendation is solid, just that Corsair decided to prove a concept commercially. Theoretically, it allows for easier handling of the connectors on the PSU. Trade-off: you can't turn the PSU upside down.
 
Fellas this conversation is literally pointless, the second you spotted "Navi 21 + low capacity EVGA N1 unit" the conversation ended right there. There's literally nothing you can do to make that GPU run on that power supply without exhibiting major issues, it's like trying to power an EV on a couple of triple A's.

Marcus L said:
Looking at a couple of PSU's



open to other suggestions, budget is £100

it happens in doom at 60fps with vsync on also, it won't be hitting anything near crazy numbers like that but I am going to buy a PSU anyway to either rule it out or eat some humble pie
Click to expand...

Glad to see you've come to your senses, pickup the RM750x and enjoy. Even if the problem turns out to be the card that N1 power supply is a timebomb on a system like yours
 
wNotyarD said:
Yeah, they have the RM-x and RM-x Shift series. The Shift has the same internals, so the recommendation is solid, just that Corsair decided to prove a concept commercially. Theoretically, it allows for easier handling of the connectors on the PSU. Trade-off: you can't turn the PSU upside down.
Click to expand...

Thats weirdly a good idea, I dread everytime I need to acess my PSU to connect new disks or whatever.
Need to uscrew it or play roullete with the tip of my fingers.
Might catch on.
 
I did come across this thread, so I am not the only one who has experienced this issue with games crashing only in RT in AMD cards

https://community.amd.com/t5/driver...on-as-ray-tracing-enabled-7900-xtx/m-p/579911

That being said, since I posted this I've opened a ticket with XFX and done a bunch of troubleshooting.... to find out I have a defective card. I tried the card in another system and it worked fine, then we tried a 7900 XT in my system and it worked perfectly. Symptoms followed the card.
Click to expand...
 
Would be funny if the PSU wasn't the problem, lots of certainties being thrown around by some members when the problem is very unclear.
 
Replacing the PSU is a good step regardless the outcome.

Prevents futures failures. That PSU should never power a dedicated GPU, much less a 6800.
 
3x0 said:
Would be funny if the PSU wasn't the problem, lots of certainties being thrown around by some members when the problem is very unclear.
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I have said this from the beginning and I am still almost certain the GPU is faulty, arrogance plays a part, being talked to like a 14yo who doesn't know what he is doing has led me to ignoring some people who assume they are correct and I am a noob cause I disagree, I'm 43, been building PC's for 20 years and have no time for such attitude
lawood said:
Replacing the PSU is a good step regardless the outcome.

Prevents futures failures. That PSU should never power a dedicated GPU, much less a 6800.
Click to expand...
Bro stop being such a drama queen, yes it's a budget unit, we have established that though saying it shouldn't power any dedicated GPU is being a tad bloody dramatic, it has lasted almost 5 years through quite a few different GPU's, it's not a $10 chinglish unit that is likely to blow up under any serious load and take out half your components with it
 
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