作者freaky

這是因為980出的時候根本feature level都還沒訂出來，並非GM204不支援。
3C一向是早買早享受，晚買有折扣。
D3D 12_0和12_1並沒有任何需要符合Tier 3的feature，短期內應該也不會有這樣的卡。

# 12_0
- Resource Binding Tier 2
- Tiled Resources Tier 2 (Texture2D)
- Typed UAV Tier 1

# 12_1
- Conservative Rasterization Tier 1
- Rasterizer Ordered Views

# Optional
- Resource binding (three tiers)
- tiled resources (three tiers)
- conservative rasterization (three tiers)
- stencil reference in Pixel Shader
- rasterizer ordered views
- typed UAV (two tiers)
- UMA/hUMA support