Nvidia G-Sync:
NVIDIA G-SYNC is groundbreaking new display technology that delivers the smoothest and fastest gaming experience ever.
G-SYNC’s revolutionary performance is achieved by synchronizing display refresh rates to the GPU thus eliminating screen tearing, input lag and stuttering.
With current monitors, the GPU has a feature (V-sync) which locks the frames to 60 to provide a stable image, but when the frame rate drops, V-sync would generate additional frames to compensate and this creates a lot of stress on the GPU and creates lag.
AMD Mantle:
Mantle is a driver within the AMD Catalyst™ software suite that lets applications speak directly to the Graphics Core Next architecture.
Mantle reduces the CPU’s workload by giving developers a way to talk to the GPU directly with much less translation. With less work for the CPU to do, programmers can squeeze much more performance from a system, delivering the greatest benefits in gaming systems where the CPU can be the bottleneck.
By shifting work to the GPU, a mid-range or older CPU isn’t the same handicap it was before. With Mantle, the GPU becomes the critical part of the system, and GPU upgrades will have a bigger impact than before.
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