AMD RX 6800 RT cores defective or PSU problem?

[Marcus L]

So I bought a 6800 used from eBay in November, it works fine in raster but will crash in most games when I enable ray tracing, is it possible the ray tracing cores are defective?
My PSU is not up to scratch for this GPU it is an EVGA 600 W1 80+ which I knew at the time was likely not going to be good enough to handle the transients of the 6800 though thought with an underclock and undervolt it would be fine, but it never crashes when I am gaming using just rasterization, only when RT is enabled, games that exhibit this behaviour include but are not limited to fortnite, Doom eternal, call of duty MW, and some others, ray tracing will work in the odd game without crashing though they are few and far between and I can't remember off the top of my head which ones, maybe resident evil 4 remake? ressident evil 7 also crashes when RT is enabled. I have tried different drivers to no avail.

 

[3x0]

RT usually causes higher GPU power consumption, PSU might not be up to the task. Can you borrow a better PSU to test?

 

[Onasi]

I second the PSU suggestion. Having a very specific part of the chip be defective would be incredibly unusual. It’s usually all or nothing with them.

 

[Vya Domus]

I doubt it's the PSU, this card does not have transient spikes big enough for that to be the issue.

The chips themselves are hardly if ever defective, you say some games do work so clearly it can't be that. The only thing to try is clean driver/OS reinstall, do not buy second hand GPUs that you can't test in person.

 

[Onasi]

I doubt it's the PSU, this card does not have transient spikes big enough for that to be the issue.

A decent 600W PSU would not be an issue, I agree. The problem is - we are not dealing with a decent PSU here. At all.

 

[Elmaars]

Hello , I've had similar issue with RX 6950XT , when enabling ray tracing the gpu driver crashes. Could you provide a screenshot from MSI afterburner what core clocks are you getting as default ? I managed to fix mine by lowering clocks to 2400MHz.

 

[Marcus L]

I can't test another PSU unfortunately, I do plan on buying a decent 750w when I have the money though can't right now, I thought resident evil. 7 RT worked though I tested that this morning and it doesn't, will have to test some other games to see if I can find any that work with RT, it can pull 200w GPU power in games at 100% without RT and there's never an issue or crash though games won't even load into level when enabled and it crashes during loading

 

[3x0]

Can you post .dmp files from C:\Windows\LiveKernelReports ?

 

[Marcus L]

Can you post .dmp files from C:\Windows\LiveKernelReports ?

Just heading out so will do this when I get home, it's not usually a bsod but a driver crash and I have to manually close the game from taskmgr after that

Just heading out so will do this when I get home, it's not usually a bsod but a driver crash and I have to manually close the game from taskmgr after that

Can you post .dmp files from C:\Windows\LiveKernelReports ?

attached 2 dmp files from this morning

 

[3x0]

Unfortunately he dmp files didn't provide any new details, both indicate GPU related crashes which we already knew. Can you try some really old drivers, like 22.5 and see if the problem exists? It's really rare that specific parts of the GPU core fail, as others have noted, so I'd find a way to borrow a quality 750W PSU somehow and try again. Check the PSU cables, if they're seated properly on both ends or have any burn marks/damage. That is the easiest to check ATM.

 

[Onasi]

@Elmaars above has also encountered the same issue and is also running a PSU that is a known bad apple. Considering that lowering clocks in his case helped, I do believe that this is a PSU issue.
So yeah, source a good, well regarded PSU and see if that solves the issue.

 

[Beginner Macro Device]

Try limiting your framerate to the point you get <200 W usage. Vsync, Rivatuner frame capper, whatever will be fine. Doesn't crash = you're most likely having a PSU issue.

I also had crashes in RT with my 6700 XT but these were caused by incorrect values in my custom RT configs in the specific game.

 

[Shrek]

I don't know about the EVGA 600 W1, but the EVGA 500 W1 has a design flaw

EVGA 500W Review - Another One (PSU) Bites the Dust (youtube.com)

 

[dont whant to set it"']

@Marcus L You can sort of rule out if the psu is the culprit: power tune down the card, say 5% to start while demanding the same out of it .
Mine is tuned this way for a combination of power saving, game limitations(25frames/s internal game tick),monitor 100Hz or 144Hz no 125Hz mode so the 100 it is.

 

[Marcus L]

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

 

[kapone32]

What are the temps like before it crashes?

 

[Marcus L]

It's not a temp issue, can run with a custom curve and the hotspot never exceeds 85c, GPU 65c though the crash happens just after loading, so it could be as soon as the game is launched without having time to build up any heat

 

[Onasi]

I feel like a broken record. It’s a PSU issue. Blatantly. You are using an outdated double-forward platform with bottom of the barrel components that are unlikely to actually even provide the full rated 600W in a stable manner. Forget about handling transient loads. You do not use such a PSU with any modern GPU (Turing and later) and expect any kind of stability. RT puts more of a strain on a GPU. You mentioned Doom crashing with a 100 W draw. This isn’t a good sign you think it is, it means the GPU can’t access the power it needs. Further confirming this is you saying that it runs at 200 W when 100% loaded with a maxed out game. The 6800 actually usually uses more power when not limited by some sort of cap. 220-250 would be the common numbers. Another bad sign here.

 

[Marcus L]

I feel like a broken record. It’s a PSU issue. Blatantly. You are using an outdated double-forward platform with bottom of the barrel components that are unlikely to actually even provide the full rated 600W in a stable manner. Forget about handling transient loads. You do not use such a PSU with any modern GPU (Turing and later) and expect any kind of stability. RT puts more of a strain on a GPU. You mentioned Doom crashing with a 100 W draw. This isn’t a good sign you think it is, it means the GPU can’t access the power it needs. Further confirming this is you saying that it runs at 200 W when 100% loaded with a maxed out game. The 6800 actually usually uses more power when not limited by some sort of cap. 220-250 would be the common numbers. Another bad sign here.

It is not a PSU issue if it does it under a 100w load, it can run any game with the GPU maxed without any issue whatsoever, whenever RT is enabled it crashes, how does that make sense at 100w though can run the same game at over 200w without RT and not have an issue

 

[Shrek]

That is an average and it may glitch and if the supply can't react fast enough...

Take a look at 3GHz, in one cycle light travels 10cm; i.e. even the best supply could not even be aware of an issue.
Of course things normally don't vary this quickly.

 

[Onasi]

…I just explained it to you. 100 W is just the final reading you see before the crash. It’s meaningless. What is important is that it SHOULD be higher and isn’t, if the game runs at 200 W without RT it sure is hell will pull more WITH it if everything works properly. Clearly, it doesn’t.

 

[Dr. Dro]

I don't know about the EVGA 600 W1, but the EVGA 500 W1 has a design flaw

EVGA 500W Review - Another One (PSU) Bites the Dust (youtube.com)

EVGA N1/W power supplies series should not be used with dedicated GPUs, or if it can be helped, used at all. These power supplies are really really bad.

It is not a PSU issue if it does it under a 100w load, it can run any game with the GPU maxed without any issue whatsoever, whenever RT is enabled it crashes, how does that make sense at 100w though can run the same game at over 200w without RT and not have an issue

You have an $25 power supply that's got about the worst components a power supply can be built out of, mate. Before we even delve into the abhorrent efficiency and myriad other problems, it's painfully obvious your power supply can't handle the current, wattage isn't everything. There's transients, ripple, etc. all to take into account... not to mention the operating temperature, which is a real concern since this thing is rated for 30°C... it was literally not meant to be used on anything but basic office computers with integrated graphics and as little peripherals as possible. In fact, this is a product that EVGA should never have tainted their brand with... you are not running a watt guzzling Navi 21 card in that.

 

[Marcus L]

…I just explained it to you. 100 W is just the final reading you see before the crash. It’s meaningless. What is important is that it SHOULD be higher and isn’t, if the game runs at 200 W without RT it sure is hell will pull more WITH it if everything works properly. Clearly, it doesn’t.

Just cause you repeat yourself doesn't make it any less true, that's not what's happening, I have tested at 60fps vsync to get the 100w number, seriously, thanks for your input though you don't have to reply with the same wrong information over and over

EVGA N1/W power supplies series should not be used with dedicated GPUs, or if it can be helped, used at all. These power supplies are really really bad.



You have an $25 power supply that's got about the worst components a power supply can be built out of, mate. Before we even delve into the abhorrent efficiency and myriad other problems, it's painfully obvious your power supply can't handle the current, wattage isn't everything. There's transients, ripple, etc. all to take into account... not to mention the operating temperature, which is a real concern since this thing is rated for 30°C... it was literally not meant to be used on anything but basic office computers with integrated graphics and as little peripherals as possible. In fact, this is a product that EVGA should never have tainted their brand with... you are not running a watt guzzling Navi 21 card in that.

I know it's crap that doesn't automatically make it the problem as at any load with RT this happens, again, thanks for your input, I don't need to keep hearing the same thing when it is clear it only happens in one scenario and that is with RT on even on low graphical settings, resolution, power, etc

 

[Dr. Dro]

Just cause you repeat yourself doesn't make it any less true, that's not what's happening, I have tested at 60fps vsync to get the 100w number, seriously, thanks for your input though you don't have to reply with the same wrong information over and over

He's not wrong, you are. But you've already made it clear you have no intention of replacing your power supply, which means you should sell your RX 6800 to someone who can actually use it and install something more appropriate, like an RX 6400 or a GT 1030. I'm outta here.

I know it's crap that doesn't automatically make it the problem as at any load with RT this happens, again, thanks for your input, I don't need to keep hearing the same thing when it is clear it only happens in one scenario and that is with RT on even on low graphical settings, resolution, power, etc

It literally IS the problem. Take the time to understand what a load line is and what are the effects of transient spikes, ripple, etc. and you'll quickly understand that PSU is actually hazardous to your system.

 

[Onasi]

You are welcome to bash your head against a brick wall when presented with an obvious solution, sure. You came with an issue seeking advice. In the very first posts you were advised sourcing a better PSU, if even temporarily, and testing with that. You decided that you don’t like this option. But you not liking it won’t change the fact that it IS the most obvious and effective solution that can be provided given the information you gave.
But suit yourself.