Does the 5800X3D's massive improvement to 1% lows suggest PC has a "memory bottleneck" problem?

Discussion in 'General Hardware' started by BlindBison, Jul 1, 2022.

  1. BlindBison

    BlindBison Ancient Guru

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    RTX 3070
    I noticed in this Hardware Unboxed video that the uplift in 1% lows is pretty staggering (average 22% -- average in general 17%). Some titles saw an uplift much greater than that, like 40-50% better 1% lows:

    Does this suggest there's some kind of a memory bottleneck for a lot of these games that the extra cache helps the system overcome? Occasionally there was a game thrown in that saw virtually no difference at least to the 1% lows (but this was very rare, Apex Legends was one if I recall correctly).

    I've noticed a lot of PC ports lately seem to struggle heavily with asset streaming and have small hitches or just frame time jitter (even with G-Sync). This has been extremely common with UE4 ports in my experience and even games like Hunt Showdown aren't really very "smooth" looking at high framerates unless you cap the framerate very aggressively. My system for context has a 5800X + 3070 + 2 x 8 gig sticks of 3600 MHz DDR4 RAM, an NVMe SSD (with Rebar ON), and a G-Sync 1440p panel so my rig's no slouch, yet I see this problem fairly often these days in a lot of titles. I've even tested many of them on 3 different PCs to confirm the behavior (Outer Worlds for example has some freaking nasty asset streaming stutter -- interestingly this game had a humongous uplift to its 1% lows with the 5800X3D).

    Is it because on console the games are built with unified memory in mind so the devs don't really concern themselves with building an efficient asset streaming system for PC (where the CPU must be responsible for copying memory to and from the different pools?). Or, am I barking up the wrong tree? Games like Cyberpunk 2077 and Red Dead Redemption 2 are proof that we can have extremely high detail open world games that also run smoothly, but devs just seem to throw out slop on PC to be frank and it's gotten pretty annoying. For whatever reason this kind of thing has gotten worse in recent years to my perception when it should be getting better. Here's hoping DirectStorage maybe helps improve things down the line. Thanks,
    eGGroLLiO likes this.
  2. Mufflore

    Mufflore Ancient Guru

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    Aorus 3090 Xtreme
    Its generally a latency issue not bandwidth, otherwise there would be average frame rate issues.

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