AMD Radeon RX 6800 XT vs NVIDIA GeForce RTX 3080

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Radeon RX 6800 XT compared with GeForce RTX 3080

	AMDRadeon RX 6800 XT	NVIDIAGeForce RTX 3080
Overview
Released
Released	November 2020	September 2020
Performance
Chip maker
Chip maker	AMD	NVIDIA
Architecture
Architecture	RDNA 2	Ampere
Shader cores
Shader cores	4,608	8,704 or 8,960
Boost clock
Boost clock	2,250 MHz (better)	1,710 MHz
Architecture
Architecture	AMD reference specification; 72 compute units and 26.8 billion transistors	GA102. NVIDIA reference specifications; the photo shows PNY's stock-clock 10 GB XLR8 Gaming REVEL EPIC-X RGB Triple Fan, whose cooler and dimensions differ from the Founders Edition.
Manufacturing process
Manufacturing process	7 nm	Samsung 8 nm 8N NVIDIA custom process
Ray tracing
Ray tracing	72 Ray Accelerators; DirectX Raytracing support	Second-generation RT Cores
AI cores
AI cores	–	Third-generation Tensor Cores
Upscaling and frame generation
Upscaling and frame generation	AMD FidelityFX Super Resolution (FSR); AMD Radeon Super Resolution	NVIDIA DLSS upscaling; no DLSS Frame Generation
Base clock
Base clock	2015 MHz game frequency; up to 2250 MHz boost, which AMD defines for bursty workloads rather than sustained gaming	1.44 GHz (10 GB); 1.26 GHz (12 GB); both have 1.71 GHz boost
Cache
Cache	128 MB AMD Infinity Cache	–
Memory
Video memory
Video memory	16 GB GDDR6	10 GB GDDR6X or 12 GB GDDR6X
Memory bus
Memory bus	256-bit	320-bit or 384-bit
Memory bandwidth
Memory bandwidth	512 GB/s	760 GB/s or 912 GB/s
Memory detail
Memory detail	Up to 16 Gbps GDDR6; 512 GB/s physical memory bandwidth	19 Gbps GDDR6X on both revisions; the 12 GB card uses a 384-bit bus and 912 GB/s bandwidth (Gainward stock-clock Phoenix specifications)
Connections and power
Board power
Board power	300 W	320 W or 350 W
Interface
Interface	PCIe 4.0	PCIe 4.0
Display outputs
Display outputs	DisplayPort 1.4a, HDMI 2.1 with VRR and FRL, and USB-C (AMD reference)	3 × DisplayPort 1.4a, 1 × HDMI 2.1; up to 4 displays; HDCP 2.3
Maximum resolution
Maximum resolution	–	7680 × 4320; HDMI supports 4K 120 Hz HDR or 8K 60 Hz HDR
Power connector
Power connector	2 × PCIe 8-pin	2 × PCIe 8-pin cables through the included adapter to 1 × 12-pin (10 GB Founders Edition); check the manufacturer for 12 GB partner cards
Recommended power supply
Recommended power supply	750 W	750 W for both revisions, based on NVIDIA's Intel Core i9-10900K test system
Slot width
Slot width	2.5-slot (AMD reference)	2-slot (10 GB Founders Edition); 12 GB partner cards vary
Size (reference card)
Size (reference card)	267 mm long (AMD reference); no reference width or height verified	285 × 112 mm, 2-slot (10 GB Founders Edition); no separate reference geometry verified for the 12 GB revision
Video encode and decode
Video encode and decode	Hardware AV1 decoding; H.264 and H.265/HEVC encode and decode	Seventh-generation NVENC, fifth-generation NVDEC; hardware AV1 decode, no AV1 encode