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Juhno
Journeyman III
Journeyman III

RX 6800 XT Low GPU Usage

GPU: RX 6800 XT Sapphire Pulse (Fresh from the store)

CPU: Ryzen 7 3800X

RAM: 16GB 2666Mhz DDR4

Motherboard: Asrock B550AM Gaming

PSU: Seasonic 1000W

 

I'm playing in 1080p and I'm getting very low performance out of this card, I got more fps with my old RX 5700 XT.

My GPU usage jumps around a LOT, mostly between 10-60% when playing games. I understand it's not always supposed to be at full usage, but I'm not getting high fps at all. Skyrim, I'm getting 30fps in cities, assassins creed origins, I'm getting 40 fps, lowering graphic settings literally does nothing. I'm even getting stutters in minecraft and truck simulators. People playing in 4k get more fps than me. 

Nothing is overheating, GPU temps never really exceed 70 degrees celcius, CPU temps never exceed 70 degrees celcius either. CPU is not bottlenecking anything as its usage never exceeds 60%. 

I already set my pc displays to High Performance, I overclocked my GPU in AMD software, I am running RAM in XMP and dual channels, I've tested every single possible driver for the GPU, I've messed around in the BIOS, I couldn't find any settings for the gpu. I've triple checked all the PSU cabling, everything is connected perfectly, but no matter what I can't get my GPU usage to be consistent. 

When I run the Kombustor stress test, everything's perfect, GPU usage is at a consistent 99%-100% there. In some games, it only reaches 99% usage in menu screens, but not in the actual game. In some games, it reaches 99% when I alt tab out of the game, but drops once again when I go back in. 

I ran the Userbenchmark test and my CPU is performing above expectations, card's performing WAY above expectations, SSD and HDD are working normally, but each time I run it, RAM is always performing way below potential, warning me I should enable XMP and use dual channel, even though I already do. 

Could this be a problem with RAM? Or did I waste $1300 on a faulty card. 

 

 

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18 Replies
mackbolan777
Forerunner
Forerunner

Re: RX 6800 XT Low GPU Usage

Try running a memory test or just upgrade that RAM to 3600Mhz. 2666Mhz is kind of low, will do the job but if you're going to spend all that on the GPU/CPU combo, why skimp on RAM? That speed can cause the CPU to bottleneck now that you have a high end card. Also, every game you mentioned is CPU intensive, not so much a problem with the 3800X as the CPU. You said you OC'ed the card, did you undervolt it and slide the lower clock to within 100Mhz of the max clock? Change the VRAM to "fast" and slide the "power limit" to max as well. Doing all that might help but that RAM is holding you back. Games should be on the SSD as well(always these days). Yes the difference is huge between 2666 and 3600 as far as FPS goes. These are my results using the RX 6800, so don't copy the settings exactly but you'll get the idea. I use 16GB DDR4 3600 CL16. Notice how my usage line is fairly flat through the test. One final point is those who play those games found going to a 5600X or 5900x improved their games by tons. Your more or less saying you run at 1080p, so RAM should fix you up. 1440p than RAM and moving to a 5000 series will fix you up.TimeSpy RX 6800 best 1_13_2021.pngRX 6800 Settings.png

"It worked before you broke it!"
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Juhno
Journeyman III
Journeyman III

Re: RX 6800 XT Low GPU Usage

Ok I will see about buying faster RAM, I'm also going for a 2k monitor at the same time. Also I did all that performance tuning but sadly it didn't change much. Another thing I forgot to mention, this was a prebuilt PC that came with that slow memory. I only changed the GPU and PSU. 

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mackbolan777
Forerunner
Forerunner

Re: RX 6800 XT Low GPU Usage

Yes, the "AM" on the board is the give away that it's a pre-built unit. Sold to OEM's. I'm not sure what games you're playing but I suspect they are games like Warzone, Fortnite, Decay, Red Dead Redemption 2, FarCry series, CyberPunk 2077, PUBG, basically games written in C++ or known to be CPU intensive. Going to a 2K monitor will make the problem worse due to even more load on the CPU. The only way to actually get out of the CPU bottleneck would be to upgrade to a 5000 series CPU. That could be the lower cost 5600X or if you need 8 cores for work or whatever, the 5900x is the top choice. The 5950X is overkill and not the best gaming CPU vs. the prior choices.

These newer cards whether AMD or Nvidia are requiring CPU upgrades to run some of the newer titles optimally. There's a thread on here where the OP says they literally went form 40-50 FPS at 1440p to the 200 FPS area by going to the AMD 5900X and the OP had the RX 6900 XT. I say this because you remarked how changing your setting gave very little increase in performance. That's a clear indication of a CPU bottleneck. I think the 5600X is the best choice since it will beat any 3000 series CPU and cost ~$300 less than a 5900X at around the $400 mark currently.

That said, it's still worth the effort to do the RAM upgrade. However, you might want to wait on the 2K until you can get into a 5000 series CPU.

"It worked before you broke it!"
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Juhno
Journeyman III
Journeyman III

Re: RX 6800 XT Low GPU Usage

I did upgrade my RAM today to 32GB 3600Mhz, my fps did go up but GPU usage is still low. Skyrim I'm getting 40 fps instead of 30 at a consistent 10-20% usage. Are you absolutely sure this could be a CPU bottleneck? My cpu usage never really exceeds 60%, and mostly hangs around 20-30. 

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dtdman420
Journeyman III
Journeyman III

Re: RX 6800 XT Low GPU Usage

No, the cpu is not the problem.  My 8700k is keeping up just fine with my 6900xt.  

Make sure you use 2 separate power cables coming from your psu to gpu. Do NOT daisy chain one power wire. You can also download GPU z and make sure you are in pcie X16

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mackbolan777
Forerunner
Forerunner

Re: RX 6800 XT Low GPU Usage

Yes, the CPU is causing it. The OP replying saying "no" is running an Intel CPU, they work much differently. Ryzen's have a poor single thread performance compared to something like his 8700k and other disadvantages when pairing the RX 6800 XT to the 3000 series CPU's. That game is very CPU intensive. The fact it ever hits 60% tells me that. Your FPS tells me that too. Probably running at 1440p or 4K as well, which will make things worse since the CPU/GPU need to work harder to draw more pixels. 

Check out a few Warzone posts on here about low FPS and see what most did. Many went to the 5950X(extreme and more for work), others went to the 5900X(great for work and play), most go with the 5600X for pure gaming reasons and light work loads.

In my opinion and many others, you cannot go wrong with the ~$370 5600X for a gaming rig. Now add video editing, Adobe type stuff, folding, you want the 5900X-5950X. The 5800X is just not worth the bang for the buck, when the others out perform or come real close to it, like the 5600X does. The 5800X is ~$180 more than the 5600X putting you in the 5900X 's price range, a far better CPU if you're spending money.

FYI, I looked at my GPU usage in BF4 on Ultra at 1080p X 32" 185Hz and it doesn't go much above 40%/130W, average 189 FPS. That seems to be with most games I have, so I wouldn't go by the usage as much as the experience. I may go to the 5600X eventually but 130 FPS is my worst in FarCry 5/New Dawn, so not complaining. Skyrim isn't a game I have but it's heavy with scripts which slow it down. Here's a read on that and why Intel would run it better in the other OP's rig: Stupid question, can the skyrim engine be a bottleneck? : skyrimmods (reddit.com)

An Intel 8700k would go through scripts faster and the GPU you have isn't the best for handling that by itself. You're dipping into more IPC's and that is something that matching a 5000 series to that GPU would solve. Connecting the CPU L3 cache to the GPU and SAM does amazing things.

"It worked before you broke it!"
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Joelacosta15p
Journeyman III
Journeyman III

Re: RX 6800 XT Low GPU Usage

I saw you helping this fellow out - I was wondering if you could possibly do the same for me? 

I’m having the identical situation, but this time with a 6900XT and a 5950x (so no bottleneck on the CPU). I’m getting extremely low GPU usage that’s fluctuating anywhere from 5-89 (according to the Radeon Software) my FPS on Battlefield V have been around 130+ on ultra settings 1440 however, i’ve been receiving tons of stuttering. COD: Cold War? Virtually unplayable. Im topping out at roughly 80FPS on ultra settings and the stuttering is 10x worse than that of Battlefield.

This is honestly kind of upsetting because I purchased the 6900XT as a back up to my blown RTX 3090 and I was expecting virtually the same improvement (if not - better in some instances). however i’m not feeling the hype too much. 

 

My build is as follows:

ASUS TUF RX6900XT

Ryzen 9 5950x

ROG Crosshair VIII (Wi-Fi) x570

GSKILLZ Trident Z Royal (32GB) OC’d to 3200MHZ

EVGA Supernova 1000W Gold

Any advice would help our tremendously. Everything is running stock minus OC the RAM 

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WallabyMaster
Journeyman III
Journeyman III

Re: RX 6800 XT Low GPU Usage

Same I need some help as well. I have the samm issue as them with a sapphire nitro + 6800XT and a 5800x (so not bottleneck on cpu as well). I get good performance at 1080p in games like Red Dead, Ark, even cyberpunk. But when playing gta v, battlefront 2, COD and some other titles my gpu usage bounces from 90-30% resulting in very poor performance 50ish fps. I have the same problem with AC Odyssey and Origins, terrible performance. This is upsetting and frustrating when you spend this kind of money.  Already ran ram tests and they are fine.

My build

Sapphire nitro + RX6800XT

Ryzen 7 5800x

ROG b550 F gaming

Crucial ballistix DDR4 3600mhz (16gb)

NZXT 850W Gold.

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mackbolan777
Forerunner
Forerunner

Re: RX 6800 XT Low GPU Usage

@Joelacosta15p , @WallabyMaster 

So it could well be the CPU. I just got the 5600X and my Far Cry 5 went down, way down. Far Cry New Dawn goes way up, then eventually goes down to 90 then levels off at the 160 area. I'm still experimenting, but for starters, make sure both of your CPU's are set PBO disabled not auto. There may be some CPU related issues to iron out and I will be spending the next few days trying to figure out the enigma. 

I my testing so far, my 5600x will drop core 5 in the middle of an all core, heavy load. Some cores fail to boost like they should and it sticks to boosting only the 2 best cores. Weird stuff. So stay de-tuned or try jumping into the fray! I found SAM to be pretty ueless and the "curve optimizer" as well. Might be the new BIOS 1.2.0.0, so I may try going back to 1.0.8.0, pre curve, lol. 

You can test to see if cores are dropping by getting the 4.63 Beta version of HWiFO, since it's patched to not cause shutdowns with the RX 6000 cards. Run the game(s) in question, when FPS goes to fodder, close the game or "alt/tab" to view HWiNFO and look at the CPU max and min clock speeds per core. You'll probably find one to 3 even that just stop or "sleep" at the time of the slow down.

How to fix that, is the question.

"It worked before you broke it!"
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