I am looking to build a gaming computer. My laptop just can't handle it anymore lol. I am not a hardcore gamer but I want the games I run to run well. I usually play RPG with open world type interactions and high graphics. I am trying to stay as low budget as I can so my spouse doesn't have a cow. Specifically I am wondering about my graphics card 8GB vs 12GB what role that would play for me I do want to stay with NVIDIA (I think) I have heard better reviews. Also the power supply I have 850 W but would an 750 W work? any other advice is appreciated too.
Case: SAMA Sama-M2-BK Black USB3.0 Steel ATX Mid Tower Gaming Computer Case w/4 x 120mm Autoflow Rainbow LED Fans (Pre-Installed)
Processor: Intel Core i5-13400F Desktop Processor 10 cores (6 P-cores + 4 E-cores) 20MB Cache, up to 4.6 GHz - Box
Motherboard: ASRock B760M-HDV/M.2 LGA 1700 DDR4 Micro ATX Motherboard
Graphics card: ZOTAC GAMING GeForce RTX 4070 Twin Edge OC Spider-Man: Across the Spider-Verse Inspired Graphics Card Bundle, ZT-D40700H-10SMP
Memory: G.SKILL Ripjaws V Series 32GB (2 x 16GB) 288-Pin PC RAM DDR4 3200 (PC4 25600) Desktop Memory Model F4-3200C16D-32GVK
Storage: SAMSUNG 970 EVO PLUS M.2 2280 1TB PCIe Gen 3.0 x4, NVMe 1.3 V-NAND Internal Solid State Drive (SSD) MZ-V7S1T0B/AM
Power Supply: SAMA 850W Power Supply 80 Plus Gold Full Voltage Full Modular FDB Silent Fan ECO Mode 12V PSU ATX Power Supply for ALL Graphics Cards Black
Monitor: Acer 27" 100 Hz IPS FHD gaming monitor 1ms FreeSync (AMD Adaptive Sync), 1920 x 1080, 99% sRGB, VGA, HDMIx2, QG271 Ebii
Case: SAMA Sama-M2-BK Black USB3.0 Steel ATX Mid Tower Gaming Computer Case w/4 x 120mm Autoflow Rainbow LED Fans (Pre-Installed)
Processor: Intel Core i5-13400F Desktop Processor 10 cores (6 P-cores + 4 E-cores) 20MB Cache, up to 4.6 GHz - Box
Motherboard: ASRock B760M-HDV/M.2 LGA 1700 DDR4 Micro ATX Motherboard
Graphics card: ZOTAC GAMING GeForce RTX 4070 Twin Edge OC Spider-Man: Across the Spider-Verse Inspired Graphics Card Bundle, ZT-D40700H-10SMP
Memory: G.SKILL Ripjaws V Series 32GB (2 x 16GB) 288-Pin PC RAM DDR4 3200 (PC4 25600) Desktop Memory Model F4-3200C16D-32GVK
Storage: SAMSUNG 970 EVO PLUS M.2 2280 1TB PCIe Gen 3.0 x4, NVMe 1.3 V-NAND Internal Solid State Drive (SSD) MZ-V7S1T0B/AM
Power Supply: SAMA 850W Power Supply 80 Plus Gold Full Voltage Full Modular FDB Silent Fan ECO Mode 12V PSU ATX Power Supply for ALL Graphics Cards Black
Monitor: Acer 27" 100 Hz IPS FHD gaming monitor 1ms FreeSync (AMD Adaptive Sync), 1920 x 1080, 99% sRGB, VGA, HDMIx2, QG271 Ebii