3D Printing InfoPrinter comparison
Original Prusa i3 MK3S+ vs QIDI i-Fast
Compare hardware, build volume, printing specifications, dated prices and sources.
2 selected · all documented properties
Open these two in the interactive comparisonMore Original Prusa i3 MK3S+ comparisonsMore QIDI i-Fast comparisons
| Property | Original Prusa i3 MK3S+BEDSLINGER | QIDI i-FastIDEX |
|---|---|---|
| Identity | ||
| Brand | Prusa Research | QIDI |
| Class | BEDSLINGER | IDEX |
| Identity & Market | ||
| Manufacturer & exact marketed model name (verify the exact product identity first) | Original Prusa i3 MK3S+. The only version still listed in Aug 2026 is the "Original Prusa i3 MK3S+ 10th Anniversary Edition"[1] | QIDI Tech i-Fast, also written iFast and "I-Fast"[2][3] |
| Release date (announcement and actual shipping) | Not documented | Not published on the listings checked (Aug 2026)[2][3] |
| Street price (USD; dated snapshot per entry) | $1,199.00 assembled, $899.00 as a kit, for the 10th Anniversary Edition on prusa3d.com, Aug 2026. This is above the price the standard MK3S+ sold at, so do not read it as the MK3S+ street price[1] | $1,899.00 at Top 3D Shop, listed as discontinued with a 5-10 business-day lead time, checked Aug 2026. 3DJake no longer sells it[3][2] |
| Variants & sibling models — and how to tell them apart (spec-contamination risk) | Only the 10th Anniversary Edition remains on sale; the standard MK3S+ is gone from Prusa's printer listing. Two official upgrade paths change the machine substantially and are frequently confused with it: MK3.5 (xBuddy board and new LCD, keeps the MK3 extruder) and MK3.9 (adds the Nextruder). A caution on Prusa's own pages: the "Awards & Press Reviews" paragraph about the MK3S is reproduced verbatim on the MINI+ product page, so award text found on a Prusa page does not necessarily belong to the printer on that page[1][4][5][6] | Ships with two interchangeable dual-extruder assemblies — a standard dual head and a high-temperature dual head rated to 350 °C. Specifications quoted for one head do not apply to the other. Not to be confused with QIDI's i-Mate or the X-CF Pro[3][2] |
| Market position: superseded? successor announced? | Superseded by the MK4/MK4S line. Prusa cut MK3S+ prices at the MK4 launch in March 2023 and said it would keep selling the MK3S+ at a lower price and hold spare parts in stock[5][6] | Discontinued; QIDI's current line is the Q, Plus and Max series[3][7] |
| Physical & Frame | ||
| Build volume X×Y×Z (mm) — advertised vs actually usable | 25 x 21 x 21 cm = 250 x 210 x 210 mm (manufacturer figure)[1] | 330 x 250 x 320 mm advertised[2][3] |
| Machine footprint (mm) & clearance needed (cable/spool overhang) | 500 x 550 x 400 mm (X x Y x Z), without the spool holder[1] | 710 x 510 x 670 mm[3] |
| Net weight (kg) | 7 kg (without spool)[1] | 33 kg net[3] |
| Frame construction & material | Cut aluminium frame - Prusa's MK4 announcement contrasts "the cut aluminum frame we used so far" with the MK4's new die-cast frame[5] | Fully assembled enclosed metal-frame machine[2] |
| Enclosure: open / enclosed; panel material; door/lid | Open frame; the Original Prusa Enclosure is an optional separate product[5] | Fully enclosed with a heated chamber[2][3] |
| Kinematics & Motion Hardware | ||
| Kinematics (bedslinger i3 / CoreXY / other) | Cartesian i3 bed-slinger. Prusa's MK4 announcement notes the MK3S+ Y-axis profiles and heatbed were among the few parts carried into the MK4[5] | Dual independent extruders in an enclosed Cartesian gantry[2][3] |
| Stepper drivers (exact model e.g. TMC2209; UART/SPI; sensorless homing?) | Trinamic 2130 drivers at 256 microstepping on the EINSY RAMBo 8-bit board, co-developed with UltiMachine; sensorless homing on X and Y[1] | Not documented |
| Speed & Acceleration | ||
| Max print speed (claimed, mm/s) | Not documented | 30-150 mm/s print speed range (manufacturer figure — a working range, not a peak marketing number)[3] |
| Max travel speed | "200+ mm/s" max travel speed (manufacturer figure, no measurement basis given)[1] | Not documented |
| Extruder | ||
| Type (direct drive / bowden) & design name | Direct drive with Bondtech gears and an E3D V6 hotend[1] | Direct-drive, two extruders. MK10-style nozzle[2][3] |
| Hotend & Nozzle | ||
| Max nozzle temp claimed AND firmware max temp limit (both values) | 300 C claimed max nozzle temperature[1] | 350 °C on the high-temperature extruder assembly[2][3] |
| Stock nozzle size & sizes included in box | Not documented | 0.4 mm nozzle diameter[3] |
| Heated Bed & Surface | ||
| Max bed temp claimed AND firmware limit | 120 C max heatbed temperature[1] | Not documented |
| Bed surface (material, texture, coating), single/double-sided | Removable magnetic spring-steel sheets in several finishes; heatbed with cold-corner compensation[1] | Not documented |
| Leveling & Z-Offset | ||
| Auto bed leveling: probe technology (inductive / strain gauge / load cell / touch probe) | SuperPINDA inductive probe (Prusa's temperature-drift-free replacement for the original PINDA), driving automatic mesh bed levelling and a self-test routine[1] | Not documented |
| Filament Handling & Detection | ||
| Filament runout sensor (type, location) | IR filament sensor built in, supporting filament auto-loading; the print pauses when filament runs out[1] | Not documented |
| Electronics & Power | ||
| Mainboard model & MCU (exact chip markings if teardowns exist) | EINSY RAMBo 8-bit board, co-developed with UltiMachine[1] | Not documented |
| Input voltage (110/220 V, switch or auto) | Custom Delta PSU with hardware-based power panic[1] | 110-220 V[3] |
| Total rated power draw | Power consumption 80 W on PLA settings, 120 W on ABS settings[1] | 700 W rated[3] |
| Firmware & Openness | ||
| Firmware base & current version (Klipper fork / Marlin fork / proprietary) | prusa3d/Prusa-Firmware on GitHub, GPL-3.0, whose README states it is "proudly based on Marlin 1.0.x" and covers the MK3S/MK3/MK2.5S/MK2.5 line; last pushed August 2025. Updated over USB from a PC[8] | Not documented |
| Connectivity, UI & Camera | ||
| WiFi (band/standard), Ethernet, USB ports, SD/flash-drive | SD card (16 GB card included); Ethernet and Wi-Fi only via an optional Raspberry Pi[1] | Wi-Fi, LAN, USB flash drive[2][3] |
| Materials Support | ||
| Officially supported filament list | PLA, PETG, ASA, ABS, PC, CPE, PVA/BVOH, PVB, HIPS, PP, Flex, nGen, Nylon, carbon-filled, woodfill and other filled materials[1] | Carbon fibre, nylon, PETG, TPU, PC, ABS, PLA[3] |
| Safety | ||
| Thermal runaway protection (verify in firmware source if at all possible) | Prusa shipped Thermal Model protection to the MK3 line as a firmware update shortly before the MK4 launch; the firmware is open-source and auditable[5][8] | Not documented |
| Reliability, Support & Ecosystem | ||
| Warranty length & support reputation (evidence, not vibes) | 2-year warranty for consumers in the EU, Liechtenstein, Switzerland, Norway and Iceland; 1 year for EU enterprises and 1 year for the rest of the world, which includes the United States. A printer bought from a reseller or privately carries 1 year from the original delivery date and is handled by the reseller. Prusa advertises 24/7 chat and e-mail support in seven languages[9][10] | Not documented |
Manufacturer claims, independent measurements, packages and test conditions retain their source wording. FDM linear speed and resin vertical speed use different units and are not directly comparable. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.
Sources for this comparison
- Original Prusa i3 MK3S+ 10th Anniversary Edition product page (Technical Parameters + Full Features List) prusa3d.com · 2026-08 · vendor
- QIDI Tech i-Fast technical data table 3djake.com · 2026-08 · vendor
- QIDI Tech i-Fast Dual Extruder FDM 3D Printer listing top3dshop.com · 2026-08 · vendor
- Original Prusa MINI+ Semi-assembled 3D Printer product page (Technical Parameters + Full Features List, January 2025 Edition) prusa3d.com · 2026-08 · vendor
- Prusa blog - Original Prusa MK4 is here (published 29 March 2023), including the MK4 specification table and launch prices blog.prusa3d.com · 2026-08 · doc
- Prusa 3D printers category listing with live e-shop prices, Aug 2026 prusa3d.com · 2026-08 · vendor
- QIDI US store full product collection us.qidi3d.com · 2026-08 · vendor
- GitHub - prusa3d/Prusa-Firmware (MK3 line, GPL-3.0, based on Marlin 1.0.x) github.com · 2026-08 · doc
- Prusa Knowledge Base - Warranty help.prusa3d.com · 2026-08 · doc
- Original Prusa MK4S 3D Printer product page (Technical Parameters + CORE One+/MK4S/XL comparison table) prusa3d.com · 2026-08 · vendor