OEM-only & never released Core 2 processors

[Calbris]

Note that a bolded 'S' is an unofficial designation for Core 2 Duo and Core 2 Quad processors, a non-bolded 'S' means it is official and is shown on the heatspreader. One common example of an unofficial 'S' variant is SLAWH, a Core 2 Quad Q9300 built for systems with a Voltage Regulator Down (VRD) 11.1-compatible Voltage Regulator Module (VRM) that only supports 775_VR_CONFIG_06. This means the Q9300 SLAWH has a 65W TDP rating, despite it lacking an 'S' suffix on its heatspreader text. I found this out by looking at the text lasered onto the heatspreader, more specifically '2.50GHZ/6M/1333/06'. The first number is the core clock frequency, the second is the L2 cache, the third is the front-side bus clock frequency, and the fourth is the VR_CONFIG code. That's how I knew its TDP rating wasn't the same when compared with the standard Q9300, since it normally ends with 05A which corresponds to a 95W TDP rating (775_VR_CONFIG_05A).

For Core 2 Quad Q7xxx processors, this might not apply as the non-S processors are given the same VR_CONFIG code. The only possible explanation that I can give is the official 'S' variants may have been rated to run at a TDP lower than 65W, very likely to be 45W in this case. For reference:
• Q7600 - https://www.techpowerup.com/img/09-08-17/9a.jpg
• Q7600S - https://www.hardwareluxx.de/community/attachments/q7600s2-jpg.122003/

For all Core 2 Duo processors with the unofficial 'S' designation, the VR_CONFIG code does not show up on S-Specs with part numbers beginning with AT. Only S-Specs with part numbers beginning with EU will have the VR_CONFIG code shown on the heatspreader. Here are some examples:
• E8500 (SLBB4, AT80570AJ0876M) - https://i.ebayimg.com/images/g/HBkAAOSw06VhGaGt/s-l1600.jpg
• E8400 (SLAPG, EU80570AJ0806M) - https://i.ebayimg.com/images/g/RDIAAOSw7VRgIE1l/s-l1600.jpg
• E7400 (SLG9E, AT80571AH0723M) - https://cdn.cpu-world.com/Images/uploaded/0001/39/L_00013997.jpg
• E7200 (SLAPF, EU80571AH0613M) - https://cdn.cpu-world.com/Images/uploaded/0001/20/L_00012074.jpg
Previously, I stated that these relevant S-Specs with a VR_CONFIG code shown on the heatspreader were not real 'S' variants. That assumption was wrong, since the Xeon L3110 (45W TDP) and the Celeron 450 (35W TDP) VR_CONFIG codes were shown on their heatspreaders. This means that the only determining factor is the S-Spec's part number, A = low voltage, P = standard voltage. I assume low voltage equates to a 45W TDP rating for all Core 2 Duo processors and Core 2 Quad Q7xxx processors, but again I could be wrong.

Intel officially gave these 45W TDP Core 2 Duo processors an 'LV' prefix to differentiate them from standard voltage Core 2 Duo processors, although this was only used in an MDDS document. For example - https://www.intel.com/content/www/us/en/content-details/708949/intel-core2-duo-processors-e7500k-e7600k-e7700k-e7800k-e7400-e7700-e7500-e7600-e7800-e7900-lv-e7600-e8600-e8700-e8400-q9550s-e7300-q9400s-e8500-e7200-e8090-e8190-e8290-e8200-e8300-8867-mdds.html.

The majority of these processors are rare likely because of these reasons, it's not exhaustive but should be sufficient:
• Not meant to be sold to retail or are exclusive to a certain region (Q7xxx), likely sold to OEMs with very special requirements
• Limited production run (E8700), likely sold to OEMs for testing only or was canceled early in production
• Reserved for reviewers (X6900), not supposed to be sold to retail
• Given to Intel employees as a bonus or a gift (QX9750 - https://forums.hexus.net/abit-care-hexus/149415-bios-updates-intel-e0-stepping-5.html#post1605400)

Notes
Please understand that this is not intended to be a complete list of rare S-Specs. I don't know what is considered rare or common, but I do know that Mixeur keeps track of their rarity on his website - https://www.x86-guide.net/en/cpu/Intel-Core+2.html

I consider any Core 2 processor S-Spec that can't be found in Intel's ARK as never released. If they can be found in Intel's ARK, they will not be listed here. Note that S-Specs with a link means it has been added to CPU-World's database; they are linked automatically and are not done manually.

Socket T, LGA775
Product name | Frequency | Part number | S-Spec
Core 2 Extreme QX9770 | 3.20 GHz | EU80569XL088NL | SLAN2 [Not listed in the QDMS, part number is not confirmed]
Core 2 Extreme QX9770 | 3.20 GHz | AT80569XL088NL | SLB8U
Core 2 Extreme QX9750 | 3.16 GHz | AT80569XJ087NL | SLBBU
Core 2 Extreme QX6870 | 3.20 GHz | HH80562XL0888M | SLAJG
Core 2 Extreme QX6800 | 2.93 GHz | HH80562PH0778MP | SLAJH
Core 2 Extreme X6900 | 3.20 GHz | HH80557PH0884M | SL9S4
Core 2 Extreme X6800 | 2.93 GHz | HH80557PH0774M | SL9GA [Might be a Core 2 Duo E6800]
Core 2 Quad Q9850 | 3.33 GHz | AT80569PJ093N | SLGPD
Core 2 Quad Q9800 | 3.33 GHz | AT80580PJ0936M | SLGNP
Core 2 Quad Q9750 | 3.16 GHz | AT80569PJ087N | SLGPE
Core 2 Quad Q9705 | 3.16 GHz | AT80580PJ0876MG | SLGZ2
Core 2 Quad Q9700 | 3.16 GHz | AT80580PJ0876ML | SLGZ6
Core 2 Quad Q9700 | 3.16 GHz | AT80580PJ0876M | SLGNQ
Core 2 Quad Q9650S | 3.00 GHz | AT80569AJ080N | SLGPC
Core 2 Quad Q9605 | 3.00 GHz | AT80580PJ0806MG | SLGZ3
Core 2 Quad Q9600 | 3.00 GHz | AT80580PJ0806ML | SLGZ7
Core 2 Quad Q9600 | 3.00 GHz | AT80580PJ0806M | SLGNR
Core 2 Quad Q9600S | 3.00 GHz | AT80580AJ0806M | SLGPA
Core 2 Quad Q9550 | 2.83 GHz | EU80569PJ073N | SLAN4
Core 2 Quad Q9500 | 2.83 GHz | AT80580PJ0736M | SLB99
Core 2 Quad Q9500S | 2.83 GHz | AT80580AJ0736ML | SLGZ5
Core 2 Quad Q9500S | 2.83 GHz | AT80580AJ0736M | SLGP3
Core 2 Quad Q9450S | 2.66 GHz | EU80569AJ067N | SLAN9 [Not listed in the QDMS, part number is not confirmed]
Core 2 Quad Q9450S | 2.66 GHz | EU80569AJ067N | SLAWY
Core 2 Quad Q9450 | 2.66 GHz | EU80569PJ067N | SLAN6
Core 2 Quad Q9300 | 2.50 GHz | EU80580PJ0606M | SLAMX
Core 2 Quad Q9300 | 2.50 GHz | AT80580PJ0606M | SLGPK
Core 2 Quad Q9300S | 2.50 GHz | EU80580AJ0606M | SLAWH/SLATJ
Core 2 Quad Q9250 | 2.33 GHz | EU80569PJ053N | SLAWS/SLAN8
Core 2 Quad Q9200 | 2.33 GHz | EU80580PJ0536M | SLAWG
Core 2 Quad Q9200 | 2.33 GHz | AT80580PJ0536M | SLGPL
Core 2 Quad Q8700 | 3.16 GHz | AT80580PJ0874ML | SLGUN
Core 2 Quad Q8700 | 3.16 GHz | AT80580PJ0874M | SLGNS
Core 2 Quad Q8600 | 3.00 GHz | AT80580PJ0804ML | SLGUP
Core 2 Quad Q8600 | 3.00 GHz | AT80580PJ0804M | SLGNT
Core 2 Quad Q8500 | 2.83 GHz | AT80580PJ0734ML | SLGUQ
Core 2 Quad Q8500 | 2.83 GHz | AT80580PJ0734M | SLGNU
Core 2 Quad Q8500S | 2.83 GHz | AT80580AJ0734ML | SLGUZ
Core 2 Quad Q8500S | 2.83 GHz | AT80580AJ0734M | SLGPB
Core 2 Quad Q8400S | 2.66 GHz | AT80580AJ0674M | SLGP4
Core 2 Quad Q8400 | 2.66 GHz | AT80580PJ0674MN | SLBA5
Core 2 Quad Q8300S | 2.50 GHz | AT80580AJ0604ML | SLGV2
Core 2 Quad Q8300S | 2.50 GHz | AT80580AJ0604M | SLGP5
Core 2 Quad Q8200S | 2.33 GHz | AT80580AJ0534ML | SLGSS
Core 2 Quad Q8200 | 2.33 GHz | AT80580PJ0534ML | SLGST
Core 2 Quad Q7700S | 2.80 GHz | AT80580AG0722ML | SLGV5
Core 2 Quad Q7700 | 2.80 GHz | AT80580PG0722ML | SLGUT
Core 2 Quad Q7600S | 2.70 GHz | AT80580AG0682ML | SLGV4
Core 2 Quad Q7600 | 2.70 GHz | AT80580PG0682ML | SLGUU
Core 2 Quad Q7600 | 2.70 GHz | AT80580PG0682M | SLGNV
Core 2 Quad Q7500S | 2.60 GHz | AT80580AG0642ML | SLGV3
Core 2 Quad Q7500 | 2.60 GHz | AT80580PG0642ML | SLGUV
Core 2 Quad Q7500 | 2.60 GHz | AT80580PG0642M | SLGNW
Core 2 Quad Q7400 | 2.50 GHz | AT80580PG0602ML | SLGUW
Core 2 Quad Q7400 | 2.50 GHz | AT80580PG0602M | SLGNX
Core 2 Quad Q7300 | 2.40 GHz | AT80580PG0562ML | SLGW9
Core 2 Quad Q7300 | 2.40 GHz | AT80580PG0562M | SLGNY
Core 2 Quad Q7200 | 2.30 GHz | AT80580PG0522ML | SLGUX
Core 2 Quad Q7200 | 2.30 GHz | AT80580PG0522M | SLGNZ
Core 2 Quad Q7100 | 2.20 GHz | AT80580PG0492ML | SLGUY
Core 2 Quad Q7100 | 2.20 GHz | AT80580PG0492M | SLGP2
Core 2 Quad Q6400 | 2.13 GHz | HH80562PH0468M | SL9UN/SLALF
Core 2 Duo E8700 | 3.50 GHz | AT80570PJ1006M | SLB9E
Core 2 Duo E8600S | 3.33 GHz | AT80570AJ0936M | SLGNM
Core 2 Duo E8500S | 3.16 GHz | AT80570AJ0876M | SLBB4
Core 2 Duo E8400S | 3.00 GHz | AT80570AJ0806M | SLBB5
Core 2 Duo E8400S | 3.00 GHz | EU80570AJ0806M | SLAPG
Core 2 Duo E8400 | 3.00 GHz | EU80570PJ0806M | SLGBM
Core 2 Duo E8390 | 3.00 GHz | AT80570PJ0806MN | SLG8S
Core 2 Duo E8300S | 2.83 GHz | EU80570AJ0736M | SLAPJ
Core 2 Duo E8290 | 2.83 GHz | EU80570PJ0736MN | SLAQQ
Core 2 Duo E8200S | 2.66 GHz | EU80570AJ0676M | SLAPH
Core 2 Duo E8090 | 2.50 GHz | EU80570PJ0606MN | SLAQS
Core 2 Duo E7900 | 3.46 GHz | AT80571PH0993ML | SLGTA
Core 2 Duo E7900 | 3.46 GHz | AT80571PH0993M | SLGN5
Core 2 Duo E7800K | 3.33 GHz | AT80571XH0933ML | SLGYR
Core 2 Duo E7800 | 3.33 GHz | AT80571PH0933ML | SLGTB
Core 2 Duo E7800 | 3.33 GHz | AT80571PH0933M | SLGN6
Core 2 Duo E7700K | 3.20 GHz | AT80571XH0883ML | SLGYS
Core 2 Duo E7700S | 3.20 GHz | AT80571AH0883ML | SLGTM
Core 2 Duo E7700S | 3.20 GHz | AT80571AH0883M | SLGNH
Core 2 Duo E7700 | 3.20 GHz | AT80571PH0883ML | SLGTC
Core 2 Duo E7700 | 3.20 GHz | AT80571PH0883M | SLGN7
Core 2 Duo E7600K | 3.06 GHz | AT80571XH0833ML | SLGYT
Core 2 Duo E7600S | 3.06 GHz | AT80571AH0833ML | SLGTN
Core 2 Duo E7600S | 3.06 GHz | AT80571AH0833M | SLGNJ
Core 2 Duo E7600 | 3.06 GHz | AT80571PH0833M | SLGH3
Core 2 Duo E7500K | 2.93 GHz | AT80571XH0773ML | SLGYU
Core 2 Duo E7500S | 2.93 GHz | AT80571AH0773ML | SLGTP
Core 2 Duo E7500S | 2.93 GHz | AT80571AH0773M | SLGNK
Core 2 Duo E7400S | 2.80 GHz | EU80571AH0723M | SLAT8
Core 2 Duo E7400S | 2.80 GHz | AT80571AH0723M | SLG9E
Core 2 Duo E7400 | 2.80 GHz | AT80571PH0723M | SLGQ8
Core 2 Duo E7300S | 2.66 GHz | AT80571AH0673M | SLB9P
Core 2 Duo E7300S | 2.66 GHz | EU80571AH0673M | SLATA
Core 2 Duo E7300 | 2.66 GHz | EU80571PH0673M | SLAVP
Core 2 Duo E7300 | 2.66 GHz | AT80571PH0673M | SLB9X
Core 2 Duo E7200S | 2.53 GHz | EU80571AH0613M | SLAPF
Core 2 Duo E7200 | 2.53 GHz | AT80571PH0613M | SLB9W
Core 2 Duo E7100 | 2.40 GHz | EU80571PH0563M | SLAPD
Core 2 Duo E7000 | 2.26 GHz | EU80571PH0513M | SLARC
Core 2 Duo E6750 | 2.66 GHz | HH80557AJ0674MG | SLAAR
Core 2 Duo E6700 | 2.66 GHz | HH80557PH0674MG | SL9S6/SL9PP
Core 2 Duo E6700 | 2.66 GHz | HH80557PH0674M | SL9GB
Core 2 Duo E6600 | 2.40 GHz | HH80557PH0564M | SL9GC
Core 2 Duo E6550 | 2.33 GHz | HH80557AJ0534MG | SLAAT
Core 2 Duo E6400 | 2.13 GHz | HH80557PH0462M | SL9GD/SLA5D
Core 2 Duo E6300 | 1.86 GHz | HH80557PH0362M | SL9GE/SLA2L/SLA5E
Core 2 Duo E4400 | 2.00 GHz | HH80557PG0412M | SLA5F
Core 2 Duo E4300 | 1.80 GHz | HH80557PG0332M | SL9UG/SL9TX/SLA5G

Socket J, LGA771
Product name | Frequency | Part number | S-Spec
Core 2 Extreme QX9875 | 3.40 GHz | AT80574XL096N | SLBB8
Core 2 Extreme QX9775 | 3.20 GHz | AT80574XL088N | SLBB9
Core 2 Duo E6405 | 2.13 GHz | HH80556KH046F | SLAGG
Core 2 Duo E6305 | 1.86 GHz | HH80556KH036F | SLAGF

Socket P, PGA478MN
Product name | Frequency | Part number | S-Spec
Core 2 Extreme QX9400 | 2.66 GHz | AW80581ZH067003 | SLGEF
Core 2 Quad Q9200 | 2.40 GHz | AW80581GH056003 | SLGEG
Core 2 Duo E8435 | 3.06 GHz | AW80576GH0836ML | SLGEA
Core 2 Duo E8435 | 3.06 GHz | AW80576GH0836M | SLG8M
Core 2 Duo E8435 | 3.06 GHz | FF80576GH0836M | SLAQD
Core 2 Duo E8335 | 2.93 GHz | AW80576GH0776ML | SLGEB
Core 2 Duo E8335 | 2.93 GHz | AW80576GH0776M | SLG8V
Core 2 Duo E8335 | 2.66 GHz | FF80576GH0776M | SLAQC
Core 2 Duo E8235 | 2.80 GHz | AW80576GH0726ML | SLGEC
Core 2 Duo E8235 | 2.80 GHz | AW80576GH0726MA | SLG8N [The ARK incorrectly listed this S-Spec as a T9600]
Core 2 Duo E8235 | 2.80 GHz | FF80576GH0726M | SLAQB
Core 2 Duo E8135 | 2.66 GHz | AW80576GH0676ML | SLGED
Core 2 Duo E8135 | 2.66 GHz | AW80576GH0676M | SLG8W
Core 2 Duo E8135 | 2.40 GHz | FF80576GH0676M | SLAQA
Core 2 Duo T8300 | 2.40 GHz | FF80577GG0563MB | SLAY6
Core 2 Duo T8100 | 2.10 GHz | FF80577GG0453MB | SLAY5
Core 2 Duo T7500 | 2.20 GHz | LF80537GG0494M | SLKY7
Core 2 Duo T7450 | 2.20 GHz | LF80537GG0492M | SLGG2 [T7350 or T7450, likely the latter since the T7250 exists, replacing the T7200]
Core 2 Duo T7300 | 2.00 GHz | LF80537GG0414M | SLAMD
Core 2 Duo T7250 | 2.00 GHz | LF80537GG0412M | SLAXH
Core 2 Duo T6970 | 2.50 GHz | AW80577GG0602MH | SLGLJ
Core 2 Duo T6900 | 2.50 GHz | AW80577GG0602ML | SLGMB
Core 2 Duo T6900 | 2.50 GHz | AW80577GG0602MA | SLGHZ
Core 2 Duo T6870 | 2.40 GHz | AW80577GG0562MH | SLGLG
Core 2 Duo T6800 | 2.40 GHz | AW80577GG0562ML | SLGMC
Core 2 Duo T6800 | 2.40 GHz | AW80577GG0562MA | SLGJ2
Core 2 Duo T6770 | 2.30 GHz | AW80577GG0522MH | SLGLH
Core 2 Duo T6700 | 2.30 GHz | AW80577GG0522ML | SLGMD
Core 2 Duo T6700 | 2.30 GHz | AW80577GG0522MA | SLGJ3/SLGJ8
Core 2 Duo T6600 | 2.20 GHz | AW80577GG0492ML | SLGN3
Core 2 Duo T6600 | 2.20 GHz | AW80577GG0492MA | SLGJ9
Core 2 Duo T6500 | 2.10 GHz | AW80577GG0452ML | SLGF4/SLGN2
Core 2 Duo T6500 | 2.10 GHz | AW80577GG0452MA | SLGJA
Core 2 Duo T6400 | 2.00 GHz | AW80577GG0412ML | SLGMZ
Core 2 Duo T6400 | 2.00 GHz | AW80577GG0412MA | SLGQ4
Core 2 Duo T6300 | 1.90 GHz | FF80577GG0372M | SLAVK
Core 2 Duo T5970 | 2.20 GHz | LF80537GG0492MN | SLB7G
Core 2 Duo T5950 | 2.33 GHz | LF80537GF0532M | SLA4B
Core 2 Duo T5900 | 2.20 GHz | LF80537GG049F | SLB6D
Core 2 Duo T5870 | 2.00 GHz | LF80537GG0412MN | SLAZR
Core 2 Duo T5850 | 2.16 GHz | LF80537GF0482M | SLA4C
Core 2 Duo T5750 | 2.00 GHz | LF80537GF0412M | SLA4D
Core 2 Duo T5670 | 1.80 GHz | LF80537GG0332MN | SLAJ5
Core 2 Duo P8700 | 2.53 GHz | AW80577SH0613MA | SLGLU
Core 2 Duo P8600 | 2.40 GHz | AW80577SH0563MA | SLGLV
Core 2 Duo P7450 | 2.13 GHz | AW80577SH0463MA | SLGLX
Core 2 Duo P7450 | 2.13 GHz | AW80577SH0463M | SLG8Y/SLGFB/SLGF7/SLGCK
Core 2 Duo P7370 | 2.00 GHz | AW80577SH0413ML | SLG8X/SLGFA
Core 2 Duo P7350 | 2.00 GHz | AW80577SH0413MA | SLGLY
Core 2 Duo P7350 | 2.00 GHz | AW80577SH0413M | SLGF6/SLGCN

Socket M, PGA478MT
Product name | Frequency | Part number | S-Spec
Core 2 Duo T7600G | 2.33 GHz | LF80537GF0534MU | SL9U5
Core 2 Duo T7400 | 2.16 GHz | LF80537GF0484M | SLKY8
Core 2 Duo T5500 | 1.66 GHz | LF80537GF0282M | SLKY9
Core 2 Duo T5200 | 1.60 GHz | LF80537GE0252M | SL9VP

EDIT: This should be the last edit as I can no longer check S-Specs or part numbers for confirmation due to Intel's removal of its QDMS. Note that some special S-Specs don't exist in the QDMS (when it still existed), but the RoHS topics listed below may contain them. Have a look if you're interested in finding out more of these unreleased S-Specs and other non-Core 2 processors.

RoHS Docs - 80579 Tolapai SoC - https://www.cpu-world.com/forum/viewtopic.php?t=15408
RoHS Docs - Knights Corner - https://www.cpu-world.com/forum/viewtopic.php?t=17633
RoHS Docs - Ivy Bridge - https://www.cpu-world.com/forum/viewtopic.php?t=17632
RoHS Docs - Vermilion Range SoC - https://www.cpu-world.com/forum/viewtopic.php?t=17635
RoHS Docs - Arrandale 80617 parts - https://www.cpu-world.com/forum/viewtopic.php?t=17939
RoHS Docs - Cedarview / Penwell / Cloverview (Atom) - https://www.cpu-world.com/forum/viewtopic.php?t=17634
RoHS Docs - Nehalem Core Xeons - https://www.cpu-world.com/forum/viewtopic.php?t=16312
RoHS Docs - Banias Dothan Merom Yonah Core - https://www.cpu-world.com/forum/viewtopic.php?t=15392
RoHS Docs - Coppermine & Tualatin Cores - https://www.cpu-world.com/forum/viewtopic.php?t=15396
RoHS Docs - Atom Processor - https://www.cpu-world.com/forum/viewtopic.php?t=15409
RoHS Docs - 775 LGA package - https://www.cpu-world.com/forum/viewtopic.php?t=15407
RoHS Docs - 478 package - https://www.cpu-world.com/forum/viewtopic.php?t=15406
RoHS Docs - Itanium 2 - https://www.cpu-world.com/forum/viewtopic.php?t=15405
RoHS Docs - 603/604 Xeons - https://www.cpu-world.com/forum/viewtopic.php?t=15404
sSpecs in Intel docs but not found in the wild - https://www.cpu-world.com/forum/viewtopic.php?t=13180
Nehalem Xeon Mac Pro Part Numbers (Lidless LGA1366) - https://www.cpu-world.com/forum/viewtopic.php?t=34879
Intel keeps Genna busy - https://www.cpu-world.com/forum/viewtopic.php?t=15377
New sSpecs with no part number - https://www.cpu-world.com/forum/viewtopic.php?t=23677
Ceramic Pentium qSpecs - https://www.cpu-world.com/forum/viewtopic.php?t=20961
LF80539 Dothan? - https://www.cpu-world.com/forum/viewtopic.php?t=15805
Rare Intel processor with unreleased core - https://www.cpu-world.com/forum/viewtopic.php?t=16355
130nm Socket 775 CPUs - https://www.cpu-world.com/forum/viewtopic.php?t=16623
Intel Product Change Notification 111705-00 (Sandy Bridge) - https://www.cpu-world.com/forum/viewtopic.php?t=32904
Never released Socket G1, G2, and G3 processors - https://www.cpu-world.com/forum/viewtopic.php?t=35664
Never released Socket H1, H2, H3, H4, and H5 processors - https://www.cpu-world.com/forum/viewtopic.php?t=39230

[H3nrik V!]

According to my notes, there's a Q8200S as well - I remember I bought one from new back in the day, and I specifically wanted the "S" version as it was running cooler. What I didn't know back then was that is was because of a TDP-Down config

Also I believe, there's a Q9505S.

The Q8300S was new to me, I'll update my sheet with that

[H3nrik V!]

Holy fudge, just realized that all the specs, you list here are OEM/Unreleased - and no specs on CPU-World for them ...? Wow!

[Calbris]

A Q8200 with a 65W TDP or a Q8200S? If it's a Q8200S, was it the uncommon SLGSS or the common SLG9T?

I'm pretty sure the Q9505S was released - https://ark.intel.com/content/www/us/en/ark/products/42921/intel-core2-quad-processor-q9505s-6m-cache-2-83-ghz-1333-mhz-fsb.html#tab-blade-1-4.

Some of these S-Specs can only be found in Intel's QDMS, that's why a bunch of them appear to be 'newly discovered' - https://qdms.intel.com/Portal/SearchPCNDataBase.aspx. Intel doesn't usually include a list of S-Specs in the PCN documents, so the only way to find out is to look at the QDMS entries. It's quite... tedious.

[xhoba]

[crazybubba64]

Thanks for putting all of this information in one place!

[wren4777]

This is amazing, many thanks! I wonder how many of these actually exist and how many are only theoretical, like (AFAIK) the LGA775 Northwoods.

[Zamin]

q9450s es, q9450s slawy is rare?

[Calbris]

ES and QS Q-Specs, yes. That S-Spec, no.

I did not create this topic for the sole purpose of listing rare S-Specs, the intention was to set up a convenient alternative to Intel's QDMS. That way, no one has to do any tedious trial and error work to figure out what S-Specs are missing from Intel's ARK.

[debs3759]

I made this sticky, as I'm sure a few collectors will always find it useful.