CPU coolers / Compare
ARCTIC Liquid Freezer III Pro 280 vs Thermalright Grand Vision 360 ARGB
Product A: ARCTIC
30 of 54 known
ARCTIC Liquid Freezer III Pro 360
MSI MAG CoreLiquid A13 360
ASUS ROG Ryujin III 360 ARGB Extreme
CORSAIR NAUTILUS 360 RS ARGB
ID-COOLING FX360 INF
be quiet! Silent Loop 3 420mm
NZXT Kraken Elite 360 RGB (2024)
be quiet! Pure Loop 3 360mm
ARCTIC Liquid Freezer III Pro 420
MSI MPG CoreLiquid P13 360
NZXT Kraken Plus 280
NZXT Kraken Plus 240
Change ARCTIC Liquid Freezer III Pro 280
Compare the Thermalright Grand Vision 360 ARGB with
ARCTIC Liquid Freezer III Pro 360
MSI MAG CoreLiquid A13 360
ASUS ROG Ryujin III 360 ARGB Extreme
CORSAIR NAUTILUS 360 RS ARGB
ID-COOLING FX360 INF
be quiet! Silent Loop 3 420mm
NZXT Kraken Elite 360 RGB (2024)
be quiet! Pure Loop 3 360mm
ARCTIC Liquid Freezer III Pro 420
MSI MPG CoreLiquid P13 360
NZXT Kraken Plus 280
NZXT Kraken Plus 240Product B: Thermalright
30 of 54 known
NZXT Kraken Plus 280
NZXT Kraken Plus 240
ARCTIC Liquid Freezer III Pro 360
be quiet! Pure Loop 3 360mm
ARCTIC Liquid Freezer III Pro 420
MSI MPG CoreLiquid P13 360
DeepCool LT360 VISION ARGB
Phanteks Glacier One 360M25-LCD
NZXT Kraken Plus 360 RGB
Lian Li HydroShift II LCD-S 360 CL
ARCTIC Liquid Freezer III Pro 240
MSI MAG CoreLiquid A13 360
Change Thermalright Grand Vision 360 ARGB
Compare the ARCTIC Liquid Freezer III Pro 280 with
NZXT Kraken Plus 280
NZXT Kraken Plus 240
ARCTIC Liquid Freezer III Pro 360
be quiet! Pure Loop 3 360mm
ARCTIC Liquid Freezer III Pro 420
MSI MPG CoreLiquid P13 360
DeepCool LT360 VISION ARGB
Phanteks Glacier One 360M25-LCD
NZXT Kraken Plus 360 RGB
Lian Li HydroShift II LCD-S 360 CL
ARCTIC Liquid Freezer III Pro 240
MSI MAG CoreLiquid A13 36023 of 46 fields differ
- 15 different values
- 8 known for one only
- 7 the same
- 16 missing for both
Biggest differences
Each bar uses the scale of all 66 CPU coolers.
- Radiator sizeA: 280mmB: 360mmThermalright is 80 mm higher.
All 54 fields
Every value links to where we found it.


General
3 of 12 differ
Series
Model numbers
ACFRE00179A, ACFRE00183A, ACFRE00187A1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 20262Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 20265Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280-A-RGB/ACFRE00183ARead 14 October 2026ACFRE00183A is the A-RGB edition in black.6Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280-A-RGB-White/ACFRE00187ARead 14 October 2026ACFRE00187A is the A-RGB edition in white.
GTIN / EAN
4895265000317, 840033402989, 4895265000324, 840033402996, 4895265000331, 8400334030091Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 20262Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 2026Shipping Information: SKU ACFRE00179A, EAN 4895265000317, UPC 840033402989.5Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280-A-RGB/ACFRE00183ARead 14 October 2026EAN 4895265000324 and UPC 840033402996 for ACFRE00183A.6Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280-A-RGB-White/ACFRE00187ARead 14 October 2026EAN 4895265000331 and UPC 840033403009 for ACFRE00187A.
Not available
Announced
Not available
Not available
Status
Predecessor
Not available
Not available
Successor
Not available
Not available
Launch price (US)
From $123.991Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 20265Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280-A-RGB/ACFRE00183ARead 14 October 20266Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280-A-RGB-White/ACFRE00187ARead 14 October 20267Press articleclub386.com/arctic-launches-liquid-freezer-iii-pro-in-280mm-and-420mm-flavoursRead 14 October 2026
Launch price (EU)
Not available
Not available
Markets
US, EU1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 2026The arctic.de store sells in EUR incl. VAT. The US market comes from Club386's USD launch table.7Press articleclub386.com/arctic-launches-liquid-freezer-iii-pro-in-280mm-and-420mm-flavoursRead 14 October 2026USD launch prices in the article.
Not available
Colours
Black, White1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 20265Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280-A-RGB/ACFRE00183ARead 14 October 20266Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280-A-RGB-White/ACFRE00187ARead 14 October 2026
Black, White1Maker product pagethermalright.com/product/grand-vision-360-black-argbRead 15 October 2026Black on this page. White on the Grand Vision 360 ARGB WHITE page.2Maker product pagethermalright.com/product/grand-vision-360-white-argbRead 15 October 2026The white edition has its own page, Grand Vision 360 ARGB WHITE.9Retailer pagecomputerlounge.co.nz/products/thermalright-grand-vision-360-argb-white-360mm-lcd-aio-cpu-liquid-coolerRead 15 October 2026White edition sold with the same pump, 403 mm radiator and a TL-H12W-X28-S fan.
Cooler type
Air cooler layout
Not available
Not available
Rated TDP (claimed)
Not available
Not available
Base material
Thermal paste
Included1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 2026Feature text: Includes MX-6 Thermal Paste, applied by the user. The spec sheet lists TIM MX-6 (0.8 g).2Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 2026
Included3Owner's manualdownload.thermalright.com/manuals/GRANDVISION360ARGBBLACK.pdfRead 15 October 2026Component list item E: Thermal Compound X1, drawn as a syringe. It is a separate tube. Tom's Hardware names it TF7 paste.5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026Review: included with the AIO is a small tube of Thermalright TF7 thermal paste.
Compatibility
2 of 3 differ
CPU sockets
AM5, AM4, LGA1851, LGA17001Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 2026The product information block and the spec sheet name LGA1851, LGA1700, AM5 and AM4 in the specifications. The shop filter line also lists Intel 115X and 1200, but the spec sheet and manual do not, so they are not stored.2Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 20263Owner's manualsupport.arctic.de/liquid-freezer-III-pro-280Read 14 October 2026Select your CPU Socket: AMD AM5, AM4 and Intel LGA1851, LGA1700.
AM5, AM4, LGA1851, LGA1700, LGA1200, LGA1150, LGA1151, LGA1155, LGA1156, LGA2011, LGA20661Maker product pagethermalright.com/product/grand-vision-360-black-argbRead 15 October 2026Page header: Intel LGA115X/1200/1700/1851/2011/2066 and AMD AM4/AM5. LGA115X is written as LGA1150, LGA1151, LGA1155 and LGA1156. The page says 2011 with no suffix, so it is stored as LGA2011. The manual includes the LGA20XX screws in the box. Tom's Hardware lists only 1851, 1700, 1200, 115x, AM5 and AM4.3Owner's manualdownload.thermalright.com/manuals/GRANDVISION360ARGBBLACK.pdfRead 15 October 2026Installation pages show AMD AM4/AM5, Intel LGA1700/1851, LGA115X/1200 and LGA20XX with the 2011 mounting hole.5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026Specification table: Intel LGA 1851/1700/1200/115x and AMD AM5/AM4. It does not name 2011 or 2066.8Retailer pageldlc.com/en/product/PB00661511.htmlRead 15 October 2026Processor support lists AMD AM4/AM5 and Intel 1150, 1151, 1155, 1156, 1200, 1700, 1851, 2011, 2011-v3 and 2066. Only the sockets Thermalright names are stored, so 2011-v3 is not.
RAM height clearance
Not available
Not available
Offset mounting
Yes1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 2026Feature text: Offset Mounting for Intel and AMD shifts the cold plate to the CPU hotspot.3Owner's manualsupport.arctic.de/liquid-freezer-III-pro-280Read 14 October 2026AM4 step: the offset mounting leaves parts of the heatspreader visible because the CPU hotspot is off-centre.
Not available
Heatsink
None of 3 known
Heat pipes
Not available
Not available
Heat pipe diameter
Not available
Not available
Direct-contact heat pipes
Not available
Not available
Liquid cooling
5 of 7 differ
Radiator size
Radiator dimensions
Length317Width138Thickness38mm(12.5 × 5.4 × 1.5 in)1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 20262Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 2026General specifications: radiator dimensions 317 (L) x 138 (W) x 38 (H) mm, material aluminium. The 2D drawing shows two 140 mm fan positions.
Length403Width120Thickness27mm(15.9 × 4.7 × 1.1 in)1Maker product pagethermalright.com/product/grand-vision-360-black-argbRead 15 October 2026Radiator Dimensions: L403 mm x W120 mm x H27 mm. The blueprint on the page prints 403.00 +/-2.00, 120.00 +/-1.00 and 27.00 +/-1.00. Some retailers print 55 mm, which is the thickness with fans.
Radiator material
Tube length
450mm1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 20262Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 20269Press articlefunkykit.com/news/pc-computers/arctic-introduces-liquid-freezer-iii-pro-all-in-one-cpu-water-coolingRead 14 October 2026Article of 31 March 2025 on the series launch: tubes are 450 mm for the 240, 280 and 360 mm models and 500 mm for the 420. The same article said the 280 mm cooler would follow in Q2 2025.
400mm1Maker product pagethermalright.com/product/grand-vision-360-black-argbRead 15 October 2026The blueprint drawing on the page prints 400.00 +/-10 for the tube side view. LDLC France lists a hose length of 400 mm. The page does not label the figure as the tube length.8Retailer pageldlc.com/en/product/PB00661511.htmlRead 15 October 2026Key features: hose length 400 mm.
Max pump speed
Pump power connector
Fans
2 of 2 differ
Included fans
AARCTIC Liquid Freezer III Pro 280
| Model | Size (mm) | Fans | Min speed (rpm) | Max speed (rpm) | Airflow (CFM) | Static pressure (mmH₂O) | Bearing | Connector |
|---|---|---|---|---|---|---|---|---|
| P14 Pro | 140 | 2 | 400 | 2,500 | 110 | 5.2 | Fluid dynamic (FDB) | 4-pin PWM |
Source1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 2026Radiator Fan: 2x P14 Pro, 400-2500 rpm, 110 cfm | 186 m3/h, 5.2 mmH2O, fluid dynamic bearing, 4-pin fan plug. The page and the spec sheet state no fan noise level, so noise_dba is left out. The standalone P14 Pro page says 25 dB(A) for low-speed operation, which is not the full-speed figure.2Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 2026Radiator fan specifications: 2 x P14 Pro, 400-2500 rpm, 110 cfm, 5.2 mmH2O, fluid dynamic bearing, 4-pin fan plug. The VRM fan (400-2500 rpm) is not in the table. The sheet states no noise level.
BThermalright Grand Vision 360 ARGB
| Model | Size (mm) | Fans | Max speed (rpm) | Airflow (CFM) | Static pressure (mmH₂O) | Noise (claimed) (dB(A)) | Bearing | Connector |
|---|---|---|---|---|---|---|---|---|
| TL-H12-X28-S | 120 | 3 | 2,150 | 80.45 | 2.65 | 29.4 | Fluid dynamic (FDB) | 4-pin PWM |
Source1Maker product pagethermalright.com/product/grand-vision-360-black-argbRead 15 October 2026TL-H12-X28-S SPECIFICATION: 120 x 120 x 28 mm, rated speed 2150 RPM +/-10% (MAX), noise 29.4 dBA (MAX), air flow 80.45 CFM (MAX), air pressure 2.65 mm H2O (MAX), 4 PIN PWM connector, S-FDB V2 bearing. S-FDB is stored as fluid dynamic. The page does not state the fan count. The count of 3 comes from the manual. No minimum speed is published.3Owner's manualdownload.thermalright.com/manuals/GRANDVISION360ARGBBLACK.pdfRead 15 October 2026Component list: Fan 240X2, 280X2, 360X3, 420X3. The 360 has three fans.5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026Review fan table: TL-H12-X28-S, 120 x 120 x 28 mm, up to 2150 RPM, up to 80.45 CFM, up to 2.65 mmH2O, S-FDB V2. Three fans.8Retailer pageldlc.com/en/product/PB00661511.htmlRead 15 October 2026Three TL-H12-X28-S fans listed with 2150 RPM, 80.45 CFM, 2.65 mm H2O and 29.4 dB.
Fans
2
3
Display and lighting
7 of 7 differ
RGB lighting
Yes1Maker product pagethermalright.com/product/grand-vision-360-black-argbRead 15 October 2026The fan specification lists an ARGB Connector of 3 PIN 5V, and the product name says ARGB. Tom's Hardware lists ARGB on the fans and a diffused lighting strip on the CPU block.5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026Specification table: Lighting ARGB on fans, diffused lighting strip on CPU block.
Lighting standard
Not available
Built-in screen
LCD3Owner's manualdownload.thermalright.com/manuals/GRANDVISION360ARGBBLACK.pdfRead 15 October 2026The cover says Customizable LCD Screen, High Performance Fan and Pump, Addressable RGB Lighting. A Grand Vision Display User Guide follows, with a rotatable waterblock panel and an LCD screen wiring page.5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026
Screen size
Not available
3.4in(8.6 cm)5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026Review: a 3.4-inch, 480x480-resolution screen. Computer Lounge, 01comp and a Japanese retailer also say 3.4 inch. LDLC France prints 3.95 inch, which cannot fit a square panel inside a 70.5 mm wide water block, so 3.4 is stored. The maker states no size.9Retailer pagecomputerlounge.co.nz/products/thermalright-grand-vision-360-argb-white-360mm-lcd-aio-cpu-liquid-coolerRead 15 October 2026Page text: 3.4 Inch LCD Screen, IPS square screen.
Screen resolution
Not available
480 × 480px5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026Review: 480x480. LDLC France and Computer Lounge print the same.9Retailer pagecomputerlounge.co.nz/products/thermalright-grand-vision-360-argb-white-360mm-lcd-aio-cpu-liquid-coolerRead 15 October 2026Page text: IPS LCD display with 480x480 resolution.
Software
Not available
TRCC4Maker product pagethermalright.com/support/downloadRead 15 October 2026TRCC Control Software, applicable to new V2 series and liquid coolers with digital displays, version V2.1.8 on the access date, with Grand Vision in its list of compatible models. Windows only. Tom's Hardware says the cooler runs without it and the software is needed to customize the display.5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026
Needs a USB header
Yes3Owner's manualdownload.thermalright.com/manuals/GRANDVISION360ARGBBLACK.pdfRead 15 October 2026Display guide step 1 and the LCD wiring page: connect the 9 pin USB cable to the 9 pin USB socket on the motherboard, and the screen power cable to a SATA socket on the power supply. The USB cable is in the box.5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026Installation step 5: to use the display, connect the USB cable to the CPU block on one end and to a USB and SATA power header on the other ends.
Measured
1 of 6 differ
Cybenetics THETA, AMD AM5
Not available
Not available
Cybenetics THETA, Intel LGA1851
Not available
Not available
Overall performance at 30 dB(A), AM5 (measured)
Not available
Not available
Overall performance at 30 dB(A), LGA1851 (measured)
Not available
Not available
Noise at 100% fan setting (Cybenetics)
Not available
Not available
Thermal tests (measured)
AARCTIC Liquid Freezer III Pro 280
Not availableBThermalright Grand Vision 360 ARGB
| Test CPU | Load | CPU power (W) | Fan setting | Noise (dB(A)) | CPU temperature (°C) |
|---|---|---|---|---|---|
| Intel Core i7-14700K | Power limits removed | Not available | maximum | 48.9 | 88 |
| Intel Core i7-14700K | Power limits removed, average watts cooled with noise normalized | 258 | 38.9 dB(A) | 38.9 | Not available |
| Intel Core i7-14700K | Heavy gaming workload, 165 W CPU plus 275 W GPU, CPU temperature after 10 minutes | 165 | default motherboard fan curve | 42.9 | 67 |
| Intel Core Ultra 9 285K | Cinebench R23 multi-core, power limits removed | Not available | Not available | Not available | 89 |
| Intel Core Ultra 9 285K | Cinebench R23 multi-core, 253 W power limit | 253 | Not available | Not available | 76 |
| Intel Core Ultra 9 285K | 135 W CPU plus 290 W GPU | 135 | default motherboard fan curve | 40.3 | 59 |
| Intel Core Ultra 9 285K | 85 W CPU plus 290 W GPU | 85 | default motherboard fan curve | 39.3 | 50 |
Dimensions and weight
1 of 4 differ
Dimensions
Not available
Not available
Heatsink dimensions
Not available
Not available
Weight
1,905g(4.2 lb)1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 2026General specifications: weight 1905 g for the black model. Packaging weight is 2.322 kg, and the spec sheet gross weight is 2322 g.2Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 2026General specifications: weight 1905 g.
Not available
Heatsink weight
Not available
Not available
In the box
1 of 1 differ
In the box
VRM fan module, CPU contact frame (Intel), PWM cable (all in one), PWM cable (individual control), Metal flat washers, Screws, Shoulder screws (Intel), Mounting clips set (AMD), Spacers (AMD), T20 driver, MX-6 thermal paste (0.8 g)4Owner's manualsupport.arctic.de/products/liquid-freezer-iii-pro-280/techdocs/Quick_Manual_Intel_r1b.pdfRead 14 October 2026Packaging Content of the Intel quick start guide for the Liquid Freezer III Pro series: VRM fan module, CPU contact frame, two PWM cables, metal flat washers, screws (x8 or x12 by radiator size), shoulder screws, T20 driver and MX-6 (0.8 g). The AMD guide replaces the contact frame and shoulder screws with a mounting clips set and four spacers. The guides are shared by the series and list no item that only an A-RGB edition has.
Fan x3, INTEL Bracket x2, INTEL 115X/1700 Backplate x1, AMD Bracket x2, Thermal Compound x1, 115X Plastic Stands x4, 1700 Plastic Stands x4, LGA20XX Screw x4, INTEL nuts x4, Fan screw x12, Radiator screw x12, USB Cable x1, Fan ARGB Splitter Cable x1, AM4 Screw x4, AM4 Plastic Stands x43Owner's manualdownload.thermalright.com/manuals/GRANDVISION360ARGBBLACK.pdfRead 15 October 2026Component list items A to O for the 360: fan x3, Intel bracket x2, Intel 115X/1700 backplate x1, AMD bracket x2, thermal compound x1, 115X and 1700 plastic stands x4 each, LGA20XX screw x4, Intel nuts x4, fan screw x12, radiator screw x12, USB cable x1, fan ARGB splitter cable x1 for the 360, AM4 screw x4 and AM4 plastic stands x4. The labels are small and were read from an image. The page is the series guide, so the 240, 280 and 420 counts differ.5Reviewtomshardware.com/pc-components/liquid-cooling/thermalright-grand-vision-360-reviewRead 15 October 2026Review contents: three 120 mm fans, 360 mm radiator and CPU block, thermal paste, LCD screen and mounting accessories. The manual gives the item list.
Links
Not compared
Product page
Spec sheet
www.arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdf2Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 2026
Not available
Manual
support.arctic.de/liquid-freezer-III-pro-2803Owner's manualsupport.arctic.de/liquid-freezer-III-pro-280Read 14 October 2026
download.thermalright.com/manuals/GRANDVISION360ARGBBLACK.pdf3Owner's manualdownload.thermalright.com/manuals/GRANDVISION360ARGBBLACK.pdfRead 15 October 2026Grand Vision series user manual, REV 1.1, one long page of drawings with small English labels, read from an image. It covers the 240, 280, 360 and 420 sizes.
EPREL registration number
Not available
Not available
Warranty
1 of 1 differ
Manufacturer warranty (source market)
6years1Maker product pagearctic.de/en/Liquid-Freezer-III-Pro-280/ACFRE00179ARead 14 October 2026Spec sheet and page state 6 years. The page names no market.2Maker spec sheet (PDF)arctic.de/media/8d/54/b6/1748955792/Spec_Sheet_Liquid_Freezer_III_Pro_280_EN.pdfRead 14 October 2026General specifications: warranty 6 Years.
Both are also in the API. Back to all CPU coolers.