AMD Radeon RX 6600 vs AMD Radeon RX 6700 XT

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Radeon RX 6600 compared with Radeon RX 6700 XT

	AMDRadeon RX 6600	AMDRadeon RX 6700 XT
Overview
Released
Released	October 2021	March 2021
Performance
Chip maker
Chip maker	AMD	AMD
Architecture
Architecture	RDNA 2	RDNA 2
Shader cores
Shader cores	1,792	2,560
Boost clock
Boost clock	2,491 MHz	2,581 MHz (better)
Architecture
Architecture	AMD GPU specification baseline with 28 compute units, 64 ROPs and 112 texture units. Photo shows MSI's stock-clock MECH 2X 8G partner card.	AMD reference specification; 40 compute units and 17.2 billion transistors. AMD's current product table labels 1 March 2021 as the launch date, but its announcement specifies 18 March as the first on-sale date used here.
Manufacturing process
Manufacturing process	–	7 nm
Ray tracing
Ray tracing	28 ray accelerators	40 Ray Accelerators; DirectX Raytracing support
Upscaling and frame generation
Upscaling and frame generation	AMD FidelityFX Super Resolution	AMD FidelityFX Super Resolution (FSR); AMD Radeon Super Resolution
Base clock
Base clock	AMD publishes a 2,044 MHz game clock; the 2,491 MHz boost is the maximum frequency for burst workloads	2321 MHz base, 2424 MHz game frequency and up to 2581 MHz boost; AMD defines boost for bursty workloads rather than sustained gaming
Cache
Cache	32 MB Infinity Cache	96 MB AMD Infinity Cache
Memory
Video memory
Video memory	8 GB GDDR6	12 GB GDDR6 (better)
Memory bus
Memory bus	128-bit	192-bit (better)
Memory bandwidth
Memory bandwidth	224 GB/s	384 GB/s (better)
Memory detail
Memory detail	14 Gbps GDDR6; 224 GB/s bandwidth	Up to 16 Gbps GDDR6; 384 GB/s physical memory bandwidth. AMD separately claims up to 1278 GB/s effective bandwidth including Infinity Cache; this is not used as the physical bandwidth figure.
Connections and power
Board power
Board power	132 W (better)	230 W
Interface
Interface	PCIe 4.0	PCIe 4.0
Display outputs
Display outputs	Pictured MSI MECH 2X has 3 × DisplayPort 1.4 and 1 × HDMI 2.1; AMD specifies DisplayPort 1.4a and HDMI 2.1 with variable refresh rate and FRL	DisplayPort 1.4a and HDMI 2.1 supporting 4K 120 Hz or 8K 60 Hz with VRR
Maximum resolution
Maximum resolution	7680 × 4320 and up to four displays on MSI's specification	–
Power connector
Power connector	1 × 8-pin	1 × PCIe 8-pin and 1 × PCIe 6-pin
Recommended power supply
Recommended power supply	AMD specifies 450 W; MSI recommends 500 W for its pictured MECH 2X. Requirements depend on the rest of the system.	650 W
Slot width
Slot width	Partner card designs vary; MSI MECH 2X is 46 mm thick	2-slot (AMD reference)
Size (reference card)
Size (reference card)	No retail AMD reference card; pictured MSI MECH 2X is 235 × 125 × 46 mm and 710 g	267 mm long (AMD reference); no reference width or height verified
Video encode and decode
Video encode and decode	AMD publishes AV1 decoding; MSI confirms PCIe 4.0 x8	Hardware AV1 decoding; H.264 and H.265/HEVC encode and decode