Budget PC build under $750?

Hey everyone, like the title says, I'm looking for a solid build for under $1667.
The plan is to use it for gaming—nothing too crazy, since I'm on a pretty tight budget and can't really swing much more than that
An SSD would be great if we can fit it in, but it’s not a dealbreaker, and I don't need an HDD larger than 1TB.
Thanks a million for any help you guys can give me.👍
Also, quick side question: What do you all think about this assembly? Does everything look properly balanced and compatible, or should I probably steer clear of it?
🙏

LC Power CPU Cooler LC-CC-95 - 90mm
AMD CPU Dell OptiPlex (3.3GHz,16MB,95W,AM3+) box
ASUS motherboard
Seagate hard drive 1TB, 64MB, 7200rpm HDWD110UZSVA
EVGA GeForce RTX graphics card GDDR5 PCI-E DL-DVI-I+DL-DVI-D / HDMI / DP DUAL-X OC W/ExxonMobil (BIOS)
Corsair VS 550w - 80 Plus Bronze power supply
Patriot SSD Blast R560/W425, 120GB, 7mm, 2.5" PBT120GS25SSDR
Mid-Tower Black BitFenix Nova case without PSU P/N: GEBF-172
Kingston DDR3 1600MHz,C11, 8GB, KVR16N11/8

Total: $1645 Centro

The Intel build from the same retailer:

1x Intel i5 4460
1x MSI H81M-P33 iH81
1x Sapphire Nitro R9 380 2GB DDR5
1x Kingston 8GB DDR3 1600MHz
1x Seagate BarraCuda 1TB 3.5''
1x Patriot SSD Blast R560/W425, 120GB, 7mm, 2.5"
1x XFX 500W XT Series 80 Bronze, XFX-P1-500B-XTFR
1x BitFenix Nova Midi-Tower Black P/N: GEBF-172

Total: $1653