Model/ Identifier |
CPU/ Speed/ Screen/ Date/ Designation |
RAM Type & Speed |
Maximum RAM |
Hard Drive/ SSD |
iMac (Intel) iMac4,1 |
Core Duo 1.83 GHz (17″ White Early 2006 MA199LL, A1173, EMC 2104) |
DDR2-667 SODIMM |
2 GB (2 x 1 GB) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac4,2 |
Core Duo 1.83 GHz (17″ Education Integrated Graphics White Mid 2006 MA406LL/A, A1195, EMC 2110) |
DDR2-667 SODIMM |
2 GB (2 x 1 GB) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac5,2 |
Core 2 Duo 1.83 GHz (17″ Integrated Graphics White Late 2006 MA710LL /A, A1195, EMC 2124) |
DDR2-667 SODIMM |
2 GB (2 x 1 GB) |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac5,1 |
Core 2 Duo 2.0 GHz (17″ White Late 2006 MA590LL, A1208, EMC 2114) |
DDR2-667 SODIMM |
4 GB (2x2G) 3.0GB usable |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac5,1 |
Core 2 Duo 2.16 GHz (17″ White Late 2006 BTO, A1208, EMC 2114) |
DDR2-667 SODIMM |
4 GB (2x2G) 3.0GB usable |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac5,1 |
Core 2 Duo 2.16 GHz (20″ White Late 2006 MA589LL, A1207, EMC 2118) |
DDR2-667 SODIMM |
4 GB (2x2G) 3.0GB usable |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac5,1 |
Core 2 Duo 2.33 GHz (20″ White Late 2006 BTA A1207, EMC 2118) |
DDR2-667 SODIMM |
4 GB (2x2G) 3.0GB usable |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac6,1 |
Core 2 Duo 2.16 GHz (24″ White Late 2006 MA456LL, A1200, EMC 2111) |
DDR2-667 SODIMM |
4 GB (2x2G) 3.0GB usable |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac6,1 |
Core 2 Duo 2.33 GHz 24″ White Late 2006 BTO, A1200, EMC 2111) |
DDR2-667 SODIMM |
4 GB (2x2G) 3.0GB usable |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac7,1 |
Core 2 Duo 2.0 GHz (20″ Aluminum SantaRosa Mid 2007 MA876LL, A1224, EMC 2133) |
DDR2-667 SODIMM |
6 GB (4G + 2G) |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac7,1 |
Core 2 Duo 2.4 GHz (20″ Aluminum SantaRosa Mid 2007 MA877LL, A1224, EMC 2133) |
DDR2-667 SODIMM |
6 GB (4G + 2G) |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac7,1 |
Core 2 Duo 2.4 GHz (24″ Aluminum SantaRosa Mid 2007 MA878LL, A1225, EMC 2134) |
DDR2-667 SODIMM |
6 GB (4G + 2G) |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac7,1 |
Core 2 Extreme 2.8 GHz (24″ Aluminum SantaRosa Mid 2007 MB322LL/A, A1225, EMC 2134) |
DDR2-667 SODIMM |
6 GB (4G + 2G) |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac8,1 |
Core 2 Duo 2.4 GHz (20″ Al. Penryn Early 2008 MB323LL/A, A1224, EMC 2210) |
DDR2-800 SODIMM |
6 GB (4G + 2G) |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac8,1 |
Core 2 Duo 2.66 GHz (20″ Al. Penryn Early 2008 MB324LL/A, A1224, EMC 2210) |
DDR2-800 SODIMM |
6 GB (4G + 2G) |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac8,1 |
Core 2 Duo 2.8 GHz (24″ Al. Penryn Early 2008 MB325LL/A, A1225, EMC 2211) |
DDR2-800 SODIMM |
6 GB (4G + 2G) |
3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac8,1 |
Core 2 Duo 3.06 GHz (24″ Al. Penryn Early 2008 MB398LL/A, A1225, EMC 2211) |
DDR2-800 SODIMM |
6 GB (4G + 2G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac9,1 |
Core 2 Duo 2.66 GHz (20″ Early 2009 MB417LL/A A1224, EMC 2266) |
DDR3-1066 SODIMM |
8 GB (2x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac9,1 |
Core 2 Duo 2.66 GHz (24″ Early 2009 MB418LL/A A1225, EMC 2267) |
DDR3-1066 SODIMM |
8 GB (2x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac9,1 |
Core 2 Duo 2.93 GHz (24″ Early 2009 MB419LL/A, A1225, EMC 2267) |
DDR3-1066 SODIMM |
8 GB (2x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac9,1 |
Core 2 Duo 3.06 GHz (24″ Early 2009 MB420LL/A, A1225, EMC 2267) |
DDR3-1066 SODIMM |
8 GB (2x4G) |
3.5″ SATA HD 2.5″ SSD with bracket3.5″ SATA HD |
iMac (Intel) iMac9,1 |
Core 2 Duo 2.0 GHz 20″ Mid 2009 Education, MC015LL/A, A1224, EMC 2266) |
DDR3-1066 SODIMM |
8 GB (2x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac9,1 |
Core 2 Duo 2.26 GHz (20″ Education Mid 2009 MC015LL/B, A1224, EMC 2316) |
DDR3-1066 SODIMM |
8 GB (2x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac10,1 |
Core 2 Duo 3.06 GHz (21.5″ Late 2009 MB950LL/A, A1311, EMC 2308) |
DDR3-1066 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac10,1 |
Core 2 Duo 3.33 GHz (21.5″ Late 2009 BTO, A1311, EMC 2308) |
DDR3-1066 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac10,1 |
Core 2 Duo 3.06 GHz (27″ Late 2009 MB952LL/A, A1312, EMC 2309) |
DDR3-1066 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac10,1 |
Core 2 Duo 3.33 GHz (27″ Late 2009 BTO, A1312, EMC 2309) |
DDR3-1066 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,1 |
Core i5 2.66 GHz (27″ Late 2009 MB953LL/A, A1312, EMC 2309) |
DDR3-1066 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,1 |
Core i7 2.8 GHz (27″ Late 2009 BTO, A1312, EMC 2309) |
DDR3-1066 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,2 |
Core i3 3.06 GHz (21.5″ Mid 2010 MC508LL/A, A1311, EMC 2389) |
DDR3-1333 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,2 |
Core i3 3.2 GHz (21.5″ Mid 2010 MC509LL/A, A1311, EMC 2389) |
DDR3-1333 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,2 |
Core i5 3.6 GHz (21.5″ Mid 2010 BTO A1311, EMC 2389) |
DDR3-1333 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,3 |
Core i3 3.2 GHz (27″ Mid 2010 MC510LL/A, A1312, EMC 2390) |
DDR3-1333 SODIMM |
16 GB (4x4G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,3 |
Core i5 2.8 GHz (27″ Mid 2010 MC511LL/A, A1312, EMC 2390) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,3 |
Core i5 3.6 GHz (27″ Mid 2010 BTO A1312, EMC 2390) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac11,3 |
Core i7 2.93 GHz (27″ Mid 2010 BTO A1312, EMC 2390) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac12,1 |
Core i5 2.5 GHz (21.5″ Mid 2011 MC309LL/A, A1311, EMC 2428) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac12,1 |
Core i5 2.7 GHz (21.5″ Mid 2011 MC812LL/A, A1311, EMC 2428) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac12,1 |
Core i7 2.8 GHz (21.5″ Mid 2011 BTO A1311, EMC 2428) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac12,2 |
Core i5 2.7 GHz (27″ Mid 2011 MC813LL/A, A1312, EMC 2429) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac12,2 |
Core i5 3.1 GHz (27″ Mid 2011 MC814LL/A, A1312, EMC 2429) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac12,2 |
Core i7 3.4 GHz (27″ Mid 2011 BTO, A1312, EMC 2429) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac12,1 |
Core i3 3.1 GHz (21.5″ Late 2011 MC978LL/A A1311, EMC 2496) |
DDR3-1333 SODIMM |
32 GB (4x8G) |
2.5″ SSD with bracket |
iMac (Intel) iMac13,1 |
Core i5 2.7 GHz (21.5″ Late 2012 MD093LL/A A1418, EMC 2544) |
DDR3-1600 SODIMM |
16 GB (2x8G) Upgrade is difficult |
2.5″ SSD |
iMac (Intel) iMac13,1 |
Core i5 2.9 GHz (21.5″ Late 2012 MD094LL/A A1418, EMC 2544) |
DDR3-1600 SODIMM |
16 GB (2x8G) Upgrade is difficult |
2.5″ SSD |
iMac (Intel) iMac13,1 |
Core i7 3.1 GHz (21.5″ Late 2012 BTO A1418, EMC 2544) |
DDR3-1600 SODIMM |
16 GB (2x8G) Upgrade is difficult |
2.5″ SSD |
iMac (Intel) iMac13,2 |
Core i5 2.9 GHz (27″ Late 2012 MD095LL/A A1419, EMC 2546) |
DDR3-1600 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac13,2 |
Core i5 3.2 GHz (27″ Late 2012 MD096LL/A A1419, EMC 2546) |
DDR3-1600 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac13,2 |
Core i7 3.4 GHz (27″ Late 2012 BTO A1419, EMC 2546) |
DDR3-1600 SODIMM |
32 GB (4x8G) |
3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac13,1 |
Core i3 3.3 GHz (21.5″ Early 2013 Education ME699LL/A A1418 EMC 2544) |
DDR3-1600 SODIMM |
16 GB (2x8G) Upgrade is difficult |
PCI-e SSD (Fusion/SSD models only) 2.5″ SSD |
iMac (Intel) iMac14,2 |
Core i5 3.2 GHz (27″ Late 2013 ME088LL/A, A1419 EMC 2639) |
DDR3-1600 SODIMM |
32 GB (4x8G) |
PCI-e SSD (Fusion/SSD models only)3.5″ SATA HD 2.5″ SSD with bracket
|
iMac (Intel) iMac14,2 |
Core i5 3.4 GHz (27″ Late 2013 ME089LL/A, A1419 EMC 2639) |
DDR3-1600 SODIMM |
32 GB (4x8G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac14,4 iMac16,2 |
All 21.5″ Mid-2014 to Late-2015 MF883LL/A, MK442LL/A, A1418 EMC 2889 ,2805) |
LPDDR3
|
Not Upgradeable |
PCI-e SSD (Fusion/SSD models only) 2.5″ SSD |
iMac (Intel) iMac15,1 |
Core i5 3.5 GHz (27″ Retina 5K Late 2014 A1419 – EMC 2806) |
DDR3-1600 SODIMM |
32 GB (4x8G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac15,1 |
Core i7 4.0 GHz (27″ Retina 5K Late 2014 BTO/CTO A1419 – EMC 2806) |
DDR3-1600 SODIMM |
32 GB (4x8G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac15,1 |
Core i5 3.3 GHz (27″ Retina 5K Mid-2015 A1419 – EMC 2806) |
DDR3-1600 SODIMM |
32 GB (4x8G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac17,1 |
Core i5 3.2 GHz (27″ Retina 5K Late 2015 A1419 – 2834) |
DDR3-1866 SODIMM |
32 GB (4x8G) |
PCI-e SSD (fusion models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac17,1 |
Core i5 3.3 GHz (27″ Retina 5K Late 2015 A1419 – 2834) |
DDR3-1866 SODIMM |
32 GB (4x8G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac17,1 |
Core i7 4.0 GHz (27″ Retina 5K Late 2015 A1419 – 2834) |
DDR3-1866 SODIMM |
32 GB (4x8G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac18,1 |
Intel i5 2.3GHz 21.5-Inch (21.5″ Mid 2017 ) MMQA2LL/A A1418 – 3068) |
DDR4-2133 SODIMM |
32GB (2x16G) DDR4-2400. Difficult install |
PCI-e SSD (fusion models only) 2.5″ SSD |
iMac (Intel) iMac18,2 |
Intel i5 3.0 GHz 21.5-Inch (21.5″ 4K Retina Mid 2017) MNDY2LL/A A1418 – 3069) |
DDR4-2133 SODIMM |
32GB (2x16G) DDR4-2400. Difficult install |
PCI-e SSD (Fusion/SSD models only) 2.5″ SSD |
iMac (Intel) iMac18,2 |
Intel i5 3.4 GHz 21.5-Inch (21.5″ 4K Retina Mid 2017) MNE02LL/A A1418 – 3069) |
DDR4-2133 SODIMM |
32GB (2x16G) DDR4-2400. Difficult install |
PCI-e SSD (Fusion/SSD models only) 2.5″ SSD |
iMac (Intel) iMac18,3 |
Intel i7 3.6 GHz 21.5-Inch (21.5″ 4K Retina Mid 2017) BTO/CTO A1418 – 3069) |
DDR4-2133 SODIMM |
32GB (2x16G) DDR4-2400. Difficult install |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD |
iMac (Intel) iMac18,3 |
Core i5 3.4 GHz (27″ Retina 5K Mid 2017 A1419 – 3070) |
DDR4-2400 SODIMM |
64 GB (4x16G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac18,3 |
Core i5 3.5 GHz (27″ Retina 5K Mid 2017 A1419 – 3070) |
DDR4-2400 SODIMM |
64 GB (4x16G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac18,3 |
Core i5 3.8 GHz (27″ Retina 5K Mid 2017 A1419 – 3070) |
DDR4-2400 SODIMM |
64 GB (4x16G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac18,3 |
Core i7 4.2 GHz (27″ Retina 5K Mid 2017 A1419 – 3070) |
DDR4-2400 SODIMM |
64 GB (4x16G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac19,2 |
Core i3 3.6 GHz (21.5″ Retina 4K 2019 MRT32LL/A – A2116 – 3195) |
DDR4-2666 SODIMM |
64 GB (2x32G) |
PCI-e SSD (Fusion/SSD models only) 2.5″ SSD |
iMac (Intel) iMac19,2 |
Core i5 3.0 GHz (21.5″ Retina 4K 2019 MRT42LL/A – A2116 – 3195) |
DDR4-2666 SODIMM |
64 GB (2x32G) |
PCI-e SSD (Fusion/SSD models only) 2.5″ SSD |
iMac (Intel) iMac19,2 |
Core i7 3.2 GHz (21.5″ Retina 4K 2019 BTO/CTO – A2116 – 3195) |
DDR4-2666 SODIMM |
64 GB (2x32G) |
PCI-e SSD (Fusion/SSD models only) 2.5″ SSD |
iMac (Intel) iMac19,1 |
Core i5 3.0 GHz (27″ Retina 5K 2019 MRQY2LL/A – A2115 – 3194) |
DDR4-2666 SODIMM |
128 GB (4x32G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac19,1 |
Core i5 3.1 GHz (27″ Retina 5K 2019 MRR02LL/A – A2115 – 3194) |
DDR4-2666 SODIMM |
128 GB (4x32G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac19,1 |
Core i5 3.7 GHz (27″ Retina 5K 2019 MRR12LL/A- A2115 – 3194) |
DDR4-2666 SODIMM |
128 GB (4x32G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
iMac (Intel) iMac19,1 |
Core i9 3.6 GHz (27″ Retina 5K 2019 BTO/CTO – A2115 – 3194) |
DDR4-2666 SODIMM |
128 GB (4x32G) |
PCI-e SSD (Fusion/SSD models only) 3.5″ SATA HD 2.5″ SSD with bracket |
You do not seem to have the Memory Modules I need
I have an iMac late 2017 27″ with the following SO-DIMM memory modules,
PC4-2400 (192000)
Unbuffered
Nonparity
260-pin
2400GHz DDR4 SDRAM
Do you 2 x 4GB Memory modules of this type available?
Please advise
Hi John
Thanks for the note, CanadaRAM does carry the memory for your machine, and I have updated this page with the latest models of iMac now
I have a late 2015 21.5 iMac, do you have 32 go Ram and screen removal tool for this?
From EveryMac.com : The iMac “Core i5” 2.8 21.5-Inch Aluminum (Late 2015/Broadwell) features a 14-nm “Broadwell” Quad Core 2.8 GHz Intel “Core i5” processor (5575R) with four independent processor “cores” on a single chip, a 4 MB shared level 3 cache, 8 GB of onboard 1867 MHz LPDDR3 SDRAM (which could be upgraded to 16 GB at the time of order, but cannot be upgraded after system purchase at all),
Do you have the RAM to upgrade my iMac 27 late 2013
from 8GB to 16GB? How much is that? and can you do the installation?
Hi Richard
You can contact sales@canadaram.com for the quote. You have 4 memory sockets, if you have 8 now, is it 2 x 4 GB modules? As of Nov 25 2019, the DDR3-1600 RAM for the Late 2013 for 2 x 4 GB additional is $64 in DMS Certified brand, $54 in OWC brand,
for 2 x 8 GB (16 GB additional to your 8 ) it would be $91 DMS or $97 OWC plus tax and shipping depending on your location.
Hi.
My computer is a iMac Retina 4K, 21.5-inch from 2019. Processor is a 3GHz 6-Core Intel Core i5. 8 GB 2667 MHz Memory DDR4.
It’s slow as hell. Can anything be done to speed it up or should I dump it and make a smarter purchase? In the past I added memory myself to a laptop without problems, but I basically have five thumbs instead of fingers.
Many thanks.
Hi Bob
The iMac 2019 is a fine machine, with a nice screen. The Intel i5 6 core 3.0 GHz processor is the entry level for iMac, but it is quite sufficient for office and personal work. If you are editing videos or 3D modelling on the machine, I would suggest trading up for a faster model, which comes at a price of course.
Your first issue is 8 GB RAM – this is barely enough for OSX and if you are multitasking a lot, or using the Adobe image programs, or even opening a lot of tabs in Chrome, you’re going to run into heavy virtual memory use, which slows the machine dramatically. The second thing we don’t know is what your drive set up is, do you have a “Fusion” drive set, with a spinning hard drive and a very small SSD cache?
You can upgrade the RAM in this machine as far as 64 GB. Without knowing what you do with the machine, I cant say but 16 GB or 32 GB may be appropriate.
https://www.canadaram.com/apple_imac_intel.htm#iMac2019
Canadaram.com also carries the tools and the special adhesive kit for reinstalling the screen
If you have a Fusion drive set, you can back up the drive (Mandatory) then break the Fusion set which severs the connection between the cache SSD drive and the spinning hard drive (and deletes all data). Then you can upgrade the SSD to a larger, high speed PCI-e NVMe SSD drive, and use that as your main drive, while keeping the spinning 1 TB drive as a secondary volume. This will improve drive access speed substantially, for faster performance boooting, loading programs and saving data. SSD NVMe drives are here https://canadaram.com/ssd_mac10.htm. While you could also replace the hard drive with a 2.5 inch SATA SSD drive, the improvements would be a bit more modest.
Upgrading the machine is not a walk in the park, the screen has to be delaminated from the body to access the internals. This is recommended to be left to an experienced professional. Video instructions here: https://eshop.macsales.com/installvideos/iMac-21-inch-2019/?filter=memory