PCM HDD to SSD Early 991 with 40GB IDE Drive
Discussion
I have the same car and went with
1 "Transcend 64GB MSA230S mSATA SATA III SSD, DRAM Cache" (Amazon UK) £35
https://www.amazon.co.uk/dp/B07GMF7GXT?th=1
2. "Ableconn IIDE-MSAT mSATA to 2.5-Inch IDE Adapter Converter with Aluminum Frame Bracket" (Amazon US) £32
https://www.amazon.com/dp/B017VQT5YW?ref=ppx_yo2ov...
I did a lot of research before I had the car and Gemini reported that the early cars don't have a lot of space so you need to be careful about the size of the caddy and chipset.
I should add I've not fitted this yet!!!! however I did fit a Mr12volt and the info about the space for a caddy looks accurate.
The Ableconn adapter/chipset seems to be widely recognised as the ideal part from my non Gemini research like Rennlist.
Here's the output Gemini
Based on the details on your label, this PCM 3.1 unit uses an IDE (PATA) hard disk connection type.
There are two key indicators on the label that confirm this:
1. Date of Manufacture
Label Data: 23.07.2012
Hardware Context: Early-generation PCM 3.1 units manufactured in 2010, 2011, and mid-2012 (found in early 991.1, 981, and 958.1 models) were built with automotive-grade 2.5-inch IDE hard drives. Porsche transitioned the PCM 3.1 internal hardware architecture over to standard SATA connections later in the crossover period between late 2012 and 2014.
2. Software / Hardware Stand
Label Data: SW-Stand: 12144A9F / HW-Stand: 01100919
Hardware Context: This designation aligns with the older system architecture (running underlying firmware families like v1.xx, v2.xx, or v3.xx). Later SATA-equipped variants require a completely different hardware platform running v4.xx system software baseline firmware to interface natively with a SATA controller.
? Implications for SSD Upgrades
If you are planning to clone this drive to an SSD to fix or prevent the common boot-looping/resetting issues:
A standard 2.5-inch SATA SSD will not drop directly into this unit without modification.
To upgrade an IDE-based PCM 3.1, you will typically need an mSATA SSD paired with a highly specific mSATA-to-IDE conversion board (such as an Ableconn or similar Marvell-chipset based converter) that can physically fit inside the internal drive carrier slot and clear the ribbon cable.
Have other non Ableconn Marvel chipset adapters worked or are there other Marvel adapters that work as the Ableconn is US caddy
The PCM 3.1 is notoriously picky about the storage controller it communicates with. It requires an older, highly specific bridge controller to translate the IDE bus specifically the Marvell 88SA8052 chipset.
Ableconn Technologies
Cheaper, generic adapters found commonly on eBay or Amazon (often branded as "CY" or generic unbranded boards) typically use a JMicron (JM20330) or Sunplus chip. These routinely fail, cause boot loops, or won't be recognized by the PCM at all.
BoXa.net
The Ableconn IIDE-MSAT is a white-label design manufactured in Taiwan. Because of this, you do not have to import the Ableconn version from the US; the exact same board using the required Marvell 88SA8052 chipset is sold natively in the UK and Europe under different brand names:
Ableconn Technologies
+ 1
1. Lindy mSATA to 2.5" IDE SSD Drive (7mm)
Lindy
Part Number: 20937
Lindy
Details: This is a direct, identical match to the Ableconn unit. It uses the exact same layout, open metal frame architecture, and Marvell bridge controller chip. It is widely distributed by UK electronics suppliers.
Lindy
2. Delock Converter mSATA to 2.5" IDE
BoXa.net
Part Number: Delock 62434 (or similar variations depending on the housing profile)
BoXa.net
Details: Delock is another major European hardware distributor that rebrands this identical Taiwanese Marvell-chipset board. Porsche forum members in the UK and Germany frequently use this as a direct alternative to avoid US shipping fees and customs delays.
BoXa.net
?? Crucial Setup Tips for the Marvell Adapters
Whichever of the three brands you source (Ableconn, Lindy, or Delock), keep these two configuration details in mind when prepping the swap:
Remove the Jumper: These boards ship with a physical plastic jumper on the pins to set Master/Slave/Cable Select modes. For the PCM 3.1 to properly map the drive, you must completely remove the jumper.
Lindy
+ 1
Drive Limitations: Ensure you pair it with a dedicated mSATA SSD (like a Transcend or Kingston) rather than an M.2 NVMe or M.2 SATA drive, as the physical slot form factor on the Marvell board only accepts the wider 52-pin mSATA standard.
Ableconn Technologies
suggest a disk to pair with Ableconn adapter that's available in the UK either from Ebay or Amazon
When pairing an mSATA SSD with the Ableconn/Lindy/Delock Marvell-chipset adapter for the PCM 3.1, you want to stick with highly reliable, name-brand controllers that feature good thermal management and stable power draws.
The original automotive mechanical hard drive in these units is only 40GB (with only about 30GB allocated for the jukebox and map partitions), so there is absolutely no need to overspend on high-capacity drives. A 128GB or 256GB drive is the sweet spot, providing plenty of room for wear-leveling and overhead without causing partition mapping headaches.
The best options readily available in the UK via Amazon or eBay include:
1. Transcend MSA370 or MSA230S (128GB / 256GB)
Where to find: Widely available on both Amazon UK and eBay.
Why it works: Transcend's mSATA chips are a favorite in the Porsche PCM upgrade community. They are industrial-leaning, feature excellent ECC (Error Correction Code), handle power interruptions well, and run remarkably cool. The MSA370 series uses high-quality MLC or reliable 3D TLC NAND that plays perfectly with older IDE bridge chips.
2. Kingston KC600 mSATA (256GB)
Idealo
Part Number: SKC600MS/256G
Where to find: Regularly stocked on Amazon UK (often fulfilled via Amazon EU) and major UK memory distributors like Scan or eBay.
Why it works: The KC600 is one of the few modern, premium mSATA drives still actively supported by a major brand. It features hardware-based AES 256-bit encryption and a Silicon Motion SM2259 controller, which transitions smoothly through the Marvell bridge logic. It also has excellent power efficiency, drawing minimal current when the car is locked and the PCM goes into sleep mode.
Kingston Memory Shop
+ 1
3. Pre-owned Samsung 850 EVO / 860 EVO mSATA (250GB)
Where to find: Abundant on eBay UK (look for highly rated pulled hardware components).
Why it works: If you prefer eBay, searching for a used Samsung EVO mSATA drive is a brilliant route. Samsung s MGX/MJX controllers are bulletproof and have massive write endurance. Because they are older stock, they are cheap to pick up secondhand, yet their performance and reliability easily outclass cheap, unbranded generic drives.
? What to Avoid on Amazon/eBay
eBay UK
Avoid ultra-cheap, generic Chinese brands (e.g., Kingchuxing, Dogfish, TCSUNBOW, Fanxiang). While tempted by the low price tags, these drives often use volatile controllers that draw highly variable power or run hot. The tight, unventilated metal casing of the PCM 3.1 unit will bake these cheap controllers, leading to premature corruption and putting you right back at square one pulling the dashboard apart again.
eBay UK
1 "Transcend 64GB MSA230S mSATA SATA III SSD, DRAM Cache" (Amazon UK) £35
https://www.amazon.co.uk/dp/B07GMF7GXT?th=1
2. "Ableconn IIDE-MSAT mSATA to 2.5-Inch IDE Adapter Converter with Aluminum Frame Bracket" (Amazon US) £32
https://www.amazon.com/dp/B017VQT5YW?ref=ppx_yo2ov...
I did a lot of research before I had the car and Gemini reported that the early cars don't have a lot of space so you need to be careful about the size of the caddy and chipset.
I should add I've not fitted this yet!!!! however I did fit a Mr12volt and the info about the space for a caddy looks accurate.
The Ableconn adapter/chipset seems to be widely recognised as the ideal part from my non Gemini research like Rennlist.
Here's the output Gemini
Based on the details on your label, this PCM 3.1 unit uses an IDE (PATA) hard disk connection type.
There are two key indicators on the label that confirm this:
1. Date of Manufacture
Label Data: 23.07.2012
Hardware Context: Early-generation PCM 3.1 units manufactured in 2010, 2011, and mid-2012 (found in early 991.1, 981, and 958.1 models) were built with automotive-grade 2.5-inch IDE hard drives. Porsche transitioned the PCM 3.1 internal hardware architecture over to standard SATA connections later in the crossover period between late 2012 and 2014.
2. Software / Hardware Stand
Label Data: SW-Stand: 12144A9F / HW-Stand: 01100919
Hardware Context: This designation aligns with the older system architecture (running underlying firmware families like v1.xx, v2.xx, or v3.xx). Later SATA-equipped variants require a completely different hardware platform running v4.xx system software baseline firmware to interface natively with a SATA controller.
? Implications for SSD Upgrades
If you are planning to clone this drive to an SSD to fix or prevent the common boot-looping/resetting issues:
A standard 2.5-inch SATA SSD will not drop directly into this unit without modification.
To upgrade an IDE-based PCM 3.1, you will typically need an mSATA SSD paired with a highly specific mSATA-to-IDE conversion board (such as an Ableconn or similar Marvell-chipset based converter) that can physically fit inside the internal drive carrier slot and clear the ribbon cable.
Have other non Ableconn Marvel chipset adapters worked or are there other Marvel adapters that work as the Ableconn is US caddy
The PCM 3.1 is notoriously picky about the storage controller it communicates with. It requires an older, highly specific bridge controller to translate the IDE bus specifically the Marvell 88SA8052 chipset.
Ableconn Technologies
Cheaper, generic adapters found commonly on eBay or Amazon (often branded as "CY" or generic unbranded boards) typically use a JMicron (JM20330) or Sunplus chip. These routinely fail, cause boot loops, or won't be recognized by the PCM at all.
BoXa.net
The Ableconn IIDE-MSAT is a white-label design manufactured in Taiwan. Because of this, you do not have to import the Ableconn version from the US; the exact same board using the required Marvell 88SA8052 chipset is sold natively in the UK and Europe under different brand names:
Ableconn Technologies
+ 1
1. Lindy mSATA to 2.5" IDE SSD Drive (7mm)
Lindy
Part Number: 20937
Lindy
Details: This is a direct, identical match to the Ableconn unit. It uses the exact same layout, open metal frame architecture, and Marvell bridge controller chip. It is widely distributed by UK electronics suppliers.
Lindy
2. Delock Converter mSATA to 2.5" IDE
BoXa.net
Part Number: Delock 62434 (or similar variations depending on the housing profile)
BoXa.net
Details: Delock is another major European hardware distributor that rebrands this identical Taiwanese Marvell-chipset board. Porsche forum members in the UK and Germany frequently use this as a direct alternative to avoid US shipping fees and customs delays.
BoXa.net
?? Crucial Setup Tips for the Marvell Adapters
Whichever of the three brands you source (Ableconn, Lindy, or Delock), keep these two configuration details in mind when prepping the swap:
Remove the Jumper: These boards ship with a physical plastic jumper on the pins to set Master/Slave/Cable Select modes. For the PCM 3.1 to properly map the drive, you must completely remove the jumper.
Lindy
+ 1
Drive Limitations: Ensure you pair it with a dedicated mSATA SSD (like a Transcend or Kingston) rather than an M.2 NVMe or M.2 SATA drive, as the physical slot form factor on the Marvell board only accepts the wider 52-pin mSATA standard.
Ableconn Technologies
suggest a disk to pair with Ableconn adapter that's available in the UK either from Ebay or Amazon
When pairing an mSATA SSD with the Ableconn/Lindy/Delock Marvell-chipset adapter for the PCM 3.1, you want to stick with highly reliable, name-brand controllers that feature good thermal management and stable power draws.
The original automotive mechanical hard drive in these units is only 40GB (with only about 30GB allocated for the jukebox and map partitions), so there is absolutely no need to overspend on high-capacity drives. A 128GB or 256GB drive is the sweet spot, providing plenty of room for wear-leveling and overhead without causing partition mapping headaches.
The best options readily available in the UK via Amazon or eBay include:
1. Transcend MSA370 or MSA230S (128GB / 256GB)
Where to find: Widely available on both Amazon UK and eBay.
Why it works: Transcend's mSATA chips are a favorite in the Porsche PCM upgrade community. They are industrial-leaning, feature excellent ECC (Error Correction Code), handle power interruptions well, and run remarkably cool. The MSA370 series uses high-quality MLC or reliable 3D TLC NAND that plays perfectly with older IDE bridge chips.
2. Kingston KC600 mSATA (256GB)
Idealo
Part Number: SKC600MS/256G
Where to find: Regularly stocked on Amazon UK (often fulfilled via Amazon EU) and major UK memory distributors like Scan or eBay.
Why it works: The KC600 is one of the few modern, premium mSATA drives still actively supported by a major brand. It features hardware-based AES 256-bit encryption and a Silicon Motion SM2259 controller, which transitions smoothly through the Marvell bridge logic. It also has excellent power efficiency, drawing minimal current when the car is locked and the PCM goes into sleep mode.
Kingston Memory Shop
+ 1
3. Pre-owned Samsung 850 EVO / 860 EVO mSATA (250GB)
Where to find: Abundant on eBay UK (look for highly rated pulled hardware components).
Why it works: If you prefer eBay, searching for a used Samsung EVO mSATA drive is a brilliant route. Samsung s MGX/MJX controllers are bulletproof and have massive write endurance. Because they are older stock, they are cheap to pick up secondhand, yet their performance and reliability easily outclass cheap, unbranded generic drives.
? What to Avoid on Amazon/eBay
eBay UK
Avoid ultra-cheap, generic Chinese brands (e.g., Kingchuxing, Dogfish, TCSUNBOW, Fanxiang). While tempted by the low price tags, these drives often use volatile controllers that draw highly variable power or run hot. The tight, unventilated metal casing of the PCM 3.1 unit will bake these cheap controllers, leading to premature corruption and putting you right back at square one pulling the dashboard apart again.
eBay UK
Edited by FriedMarsBar on Saturday 29th August 10:58
Just got back and have a busy few days but will try ASAP. I bought a reverse camera and intend to install the cables on the Mr12Volt when I swap the HDs. I can then run the cables to the rear bumper when I do some other works like a new BMC air filter.
Like the info on HDs I did a lot of research and I found that NM Automotive make two high quality cameras, one that's a center mount, which requires drilling a hole in the underside of the number plate cutout, and one that replaces the number plate light.
I opted for the number plate version as the the reviews said the slightly off center provides a better view of the kerb. Not 100% sure how much of a difference it makes.
https://www.nmautomotive.co.uk/cameras
Like the info on HDs I did a lot of research and I found that NM Automotive make two high quality cameras, one that's a center mount, which requires drilling a hole in the underside of the number plate cutout, and one that replaces the number plate light.
I opted for the number plate version as the the reviews said the slightly off center provides a better view of the kerb. Not 100% sure how much of a difference it makes.
https://www.nmautomotive.co.uk/cameras
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