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AMD Radeon RX 580 vs AMD Radeon RX 6600

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

AMDRadeon RX 580AMDRadeon RX 6600
Overview
ReleasedApril 2017October 2021
Performance
Chip makerAMDAMD
ArchitectureGCN 4RDNA 2
Shader cores2,304 or 2,0481,792
Boost clock1,340 MHz or –2,491 MHz
ArchitectureAMD original 8 GB reference baseline uses fourth-generation GCN (Polaris), 36 compute units, 32 ROPs and 144 texture units. Photo shows MSI's factory-overclocked ARMOR 8G OC, not a reference card. Later 2048SP configurations below identify specific Chinese-market Sapphire boards.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.
Manufacturing process14 nm–
Ray tracingNo hardware ray accelerators28 ray accelerators
Upscaling and frame generation–AMD FidelityFX Super Resolution
Base clockOriginal AMD baseline is 1,257 MHz base and 1,340 MHz boost. Pictured MSI ARMOR 8G OC boosts to 1,366 MHz. Sapphire's 2048SP pages state core frequencies of 1,306 MHz (4 GB) and 1,284 MHz (8 GB V2) without a boost label, so numeric boost is omitted for those configurations.AMD publishes a 2,044 MHz game clock; the 2,491 MHz boost is the maximum frequency for burst workloads
Cache–32 MB Infinity Cache
Memory
Video memory8 GB GDDR5 or 4 GB GDDR58 GB GDDR6
Memory bus256-bit128-bit
Memory bandwidth256 GB/s or –224 GB/s
Memory detailOriginal stock Sapphire Pulse 8 GB SKU 11265-06 has 8,000 MHz effective memory; original stock 4 GB SKU 11265-10 and the named 2048SP boards have 7,000 MHz. AMD publishes 256 GB/s only for the 8 GB baseline; bandwidth is omitted for the others. Sapphire's original 4 GB power is only stated as less than 225 W, so its numeric power remains unpublished.14 Gbps GDDR6; 224 GB/s bandwidth
Connections and power
Board power185 W, – or 150 W132 W
InterfacePCIe 3.0PCIe 4.0
Display outputsPictured MSI ARMOR has 2 × DisplayPort, 2 × HDMI and dual-link DVI-D. Sapphire 2048SP 4 GB SKU 11265-65-18 has DVI-D only; 8 GB Pulse V2 SKU 11265-70-48 has one HDMI 2.0b, one DisplayPort 1.4 and DVI-D. AMD's reference feature table lists DVI as No; partner outputs vary.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
Maximum resolutionMSI ARMOR specifies 7680 × 4320 and five displays; Sapphire's named 2048SP 4 GB board is limited to 1920 × 1200 at 60 Hz over DVI-D. Its 8 GB V2 board lists DisplayPort 5120 × 2880 at 60 Hz and HDMI 4096 × 2160 at 60 Hz.7680 × 4320 and up to four displays on MSI's specification
Power connectorOne 8-pin on the pictured MSI ARMOR, original Sapphire Pulse and both named 2048SP boards1 × 8-pin
Recommended power supplyAMD and MSI specify 500 W for the original model; Sapphire specifies 500 W for original Pulse and 450 W for the named 2048SP boardsAMD specifies 450 W; MSI recommends 500 W for its pictured MECH 2X. Requirements depend on the rest of the system.
Slot widthOriginal Sapphire Pulse and named 2048SP designs occupy two slots; pictured MSI ARMOR is 38 mm thickPartner card designs vary; MSI MECH 2X is 46 mm thick
Size (reference card)Pictured MSI ARMOR is 269 × 125 × 38 mm and 653 g. Original Sapphire Pulse is 230 × 125 × 40 mm; named 2048SP 4 GB is 241 × 120 × 42 mm and 8 GB V2 is 212 × 111 × 40 mm.No retail AMD reference card; pictured MSI MECH 2X is 235 × 125 × 46 mm and 710 g
Video encode and decodeAMD publishes H.264 and H.265/HEVC encoding and decoding; Sapphire specifies PCIe 3.0 for the named variantsAMD publishes AV1 decoding; MSI confirms PCIe 4.0 x8

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