Nvidia Reflex and Boost in CoD MW
In a private multiplayer game on the Hackney Yard map, I made my following measurements. Due to the static image, you should not transfer the FPS values to a real game round with the set graphics settings. However, the validity of the measurements in relation to the real FPS values in the game remains unaffected.
Test 1: Graphics settings (1080p low settings, RTX off)
The game just looks humble in these settings. But the FPS values are suitable for a 240 Hz monitor. After all!
Neither Reflex nor Ultra Low Latency Mode bring an advantage here, but also no disadvantage. Why is that? For one thing, Ultra Low Latency Mode only does something in DX 11 play, and for another, we’re in the CPU limit. You should remember that! Reflex only gives you an advantage when you’re in the GPU limit, according to Nvidia. Boost, on the other hand, works great. Boost keeps the maximum possible clock, despite the heavy CPU bottleneck! Attention, Boost increases your power consumption and also the temperatures. Thus, air-cooled cards can also become significantly louder! One more note, anything within a millisecond difference is within the range of measurement tolerance! Now I need to crank up the settings.
Test 2: Graphics settings (1080p max. settings, RTX on)
So you can put the FPS in relation to the latencies.
Here, too, Reflex cannot yet make its appearance. We are still in the CPU limit, albeit slightly. So that means I need to crank up the resolution to 1440p.
Test 3: Graphics settings (1440p max. settings, RTX on)
The FPS are still enough for a 144 Hz monitor!
Hmm, at that point I was surprised myself! But my Ryzen 7 3800X is just too weak on the chest for an RTX 3080, even in WQHD, for CoD MW. Since I don’t currently have a UHD monitor to finally get out of the CPU limit, I had to figure something out.
Test 4: Graphics settings (1440p max settings, RTX on, 150% render scaling at 3840 x 2160 pixels)
Now we got out of the CPU limit by the skin of our teeth. Nvidia Reflex can hint at its potential here. After all, a 10% reduction in latency.
Short interim conclusion and the problem with the CPU limit
An Nvidia RTX 3080 has extremely high performance and needs a strong CPU to unleash its full potential. Goodbye AMD Ryzen 7 3800X! Nvidia Reflex works just as Nvidia advertised, once you are in GPU limit, but really only then, Reflex and Boost can reduce latency! What does that actually mean? For years I’ve had to listen to myself say the GPU must be running at 99% capacity. Honestly, does it have to be like this? Everything was just about getting the highest FPS possible.
In simplified terms, the following happens in GPU limit vs. CPU limit. If your Nvidia graphics card is currently at its GPU limit, you can significantly reduce its latency with Nvidia Reflex. This is even retroactively supported up to the 900 series (Maxwell). I think that should suffice as a little digression at this point. Now let’s take a look at Nvidia Reflex in Overwatch. Please turn the page!
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