Thread: Older Mainboard and CPU to slow down AMD RX480 ?

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  1. #1 Older Mainboard and CPU to slow down AMD RX480 ? 
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    I want to replace a GTX 750 Ti 2GB with a AMD RX480 8GB, will the outdated CPU and Mainboard be a bottle neck when editing in Resolve?

    I don't need fast export times ect, just fluid editing with simple grades (raw tab adjustments + output LUT) for raw 1080p BMPCC footage + audio.


    Currently it's working but only with "optimized media" and the 250GB cache SSD is full when editing a 3 minute piece.

    CPU:
    Intel i5 2500K

    MAINBOARD:
    Gigabyte GA-Z77P-D3

    Intel® Z77 Express Chipset - 1155
    L3 cache
    4 x 1.5V DDR3 DIMM sockets
    1 x PCI Express x16 slot, running at x16 (PCIEX16)
    Support for AMD CrossFireX™ technology
    2 x SATA 6Gb/s connectors (SATA3 0/1) supporting up to 2 SATA 6Gb/s devices
    3 x SATA 3Gb/s connectors (SATA2 2/3/4) supporting up to 3 SATA 3Gb/s devices
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  2. #2  
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    Which format are your optimized media?
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  3. #3  
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    Hopefully you used the proxy setting at the lowest quality. Also turn off your waveforms for the audio bars.
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  4. #4  
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    Quote Originally Posted by Nomad View Post
    Which format are your optimized media?
    Resolve's default settings, I can't check right now.
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  5. #5  
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    Quote Originally Posted by vicharris View Post
    Hopefully you used the proxy setting at the lowest quality. Also turn off your waveforms for the audio bars.
    Would a significant GPU update like the RX 480 reduce my needs for optimized media or would the poor CPU still be a bottle neck?
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  6. #6  
    Assuming you have no other cards in the motherboard slowing the x16 slot, the new GPU will probably assist for some formats. Anything though that's is very heavy CPU bound, like decompressing long GOP MP4/H.264 images will be CPU limited. The DNxHD and ProRes will probably be ok even with the 5 year old 4Core CPU. Remember that debaying raws images is a GPU task. Ultimately, if you buy the 480 and it improves but not enough, then the card can still go into a new motherboards with a 8-12 core CPU.
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  7. #7  
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    Quote Originally Posted by Peter Chamberlain View Post
    Assuming you have no other cards in the motherboard slowing the x16 slot, the new GPU will probably assist for some formats. Anything though that's is very heavy CPU bound, like decompressing long GOP MP4/H.264 images will be CPU limited. The DNxHD and ProRes will probably be ok even with the 5 year old 4Core CPU. Remember that debaying raws images is a GPU task. Ultimately, if you buy the 480 and it improves but not enough, then the card can still go into a new motherboards with a 8-12 core CPU.
    Thank you Peter! That answers all my questions, great!
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  8. #8  
    Senior Member ugafan's Avatar
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    my cpu is about as old as yours. i'm interested to hear your before and after results.
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  9. #9  
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    Quote Originally Posted by ugafan View Post
    my cpu is about as old as yours. i'm interested to hear your before and after results.
    Ok, I'll report back.
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  10. #10  
    Senior Member ugafan's Avatar
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    i finally upgraded to the rx480. without upgrading the other parts, i'm able to playback bmcc footage smoothly. 4.6k playback also improved, but is still choppy. but my cpu is like 6 years old so there is a bottleneck there. will probably go with ryzen 1700 for the next upgrade.

    for anyone else who has an rx 480, i definitely recommend tuning it with the amd wattman app. i've had great results improving performance in a couple of benchmarks by undervolting and increasing the frequency. once you find a stable overclock, bump up the frequency of state 6 to match state 7 to make sure your gpu core clock doesn't drop during playback in davinci resolve.
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