There are insane differences between RX 7600 8GB and 16GB:
While 8 GB of VRAM may be enough for 1080p in older titles, it is simply not sufficient for modern titles, especially with ray tracing or high-resolution gaming. This was confirmed by a deep-dive by PC Games Hardware, who pit the Radeon RX 7600 against the RX 7600 XT - two borderline identical...
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In some games, such fps drops can be seen as well with 4060 Ti 8GB and not with 16GB. What Nvidia's drivers do, unlike AMD's, they try to compensate lack of VRAM by allocating a portion of system RAM to be used as additional VRAM. This portion can take 2-3 GB of RAM.
I don't want to argue, people, but there are three things to take into account:
1. RTX 3060 had 12 GB VRAM, while RTX 3070 had 8 GB and RTX 3080 had 10 GB.
2. RTX 4070 has 12 GB VRAM, so does RTX 5070. At least with 4070 Ti (former 4080) Nvidia went from 12 GB to 16 GB with 5070 Ti. 4070 costs around 700€, 5070 is listed for 750€.
3. Intel Arc B580 with price tag of 330€ has 12 GB VRAM. For less than half of 4070/5070 cost.
(I'm talking final retail prices above.)
8 GB for any mid to enthusiast class card sold nowadays is not OK. Unfortunately, expect no more from RTX 5060, which means two gen. older card (3060) had 4 GB more VRAM. 5060 is expected to leverage DLSS4 and MFG often above 1080p and that requires additional memory.