Best Recording Settings for i7 4th Gen

[Evil Nemesis]

Hey, New here but I'm watching these forums since a year or two. I'm running my YT gaming channel and record gameplays via OBS. I have i7 4th Gen, RX 480 4GB, SSD and 3TB HDD. My question is:
What is the best setting to get maximum gameplay recording quality? (I don't stream)
I usually record with balanced settings and default Bitrage which is 3500 but I get a little bad quality specially in moving pixels. I record directly to mkv (because of random power failures) then later convert it to mp4 on same bitrate and settings like source .mkv then in adobe premiere I export the video (1080p) after editing to 10Mbps or 8Mbps but I feel like i'm increasing the filesize for no reason?
If I choose the preset "Quality" in obs after selecting my graphic card x264 or x265 won't it lag?
Please and thanks in advance.
Note: I just changed the bitrate from 3500 to 10000 ! in screenshot.

 

[Lawrence_SoCal]

A few comments while you await someone responding who can help you more directly
1. I use NVENC, so not something I've researched. But your screen shot shows using AMD's H.265 (HEVC). Does that work on the RX480?
2. at Bitrate of 3500 seems low to me when I'm streaming at 720p30fps at 5,000. I record locally at 1080p at a 1hr video runs about 10GB
3. based on bitrate, your security s/w settings, etc you should watch Disk I/O when writing (recording video) to a HDD. Personally I record to my NVMe OS drive, then move once recording completed so I don't have to think/worry about it.. probably overkill... but not worth my time to research further
4. You can let OBS remux to MP4 which is just swapping at the wrapper (not re-encoding, which means no quality change). Remember, all of these video formats are LOSSY. If you aren't careful, each processing can degrade quality (like VHS generational degradation when copying in days gone by)
5. Hopefully you understand the H.264 is the older, less compressed video format. Using H.265 means smaller file size for same quality, at cost of extra computation (which having an old CPU means you may/may not have). If you can GPU encode offload to RX480 when recording, and CPU utilization remains reasonable, then no worries. Will doing so overload the GPU (cause a lag)? depends, just like not driving blindfolded, you should monitor so you can know. I'm not familiar with GPU encode offload with AMD (other than hearing about bad AMD's H.264 implementation/drivers used for streaming are). With nVidia, the GPU encode is a separate portion of card to driving it near maximum wouldn't effect gameplay, for example (and I'm sure there are edge, but in general, on modern CPU (last couple of generations), that is how it works)

As you are recording only, not streaming. Have you tried upping the quality level and bitrate on the recording (yes, it will getter larger faster) and record to SSD (assuming properly managed and adequate free space)?
Oh, and searching these forums for settings recommendations for AMD GPU recording settings and specifically that RX480 would probably be a good use of your time

 

[Evil Nemesis]

Thanks for the reply mate. I updated the settings now.