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Model A1312 / Mid 2010 / 3.2 GHz Core i3 or 2.8 & 3.6 GHz Core i5 or 2.93 GHz Core i7, ID iMac11,3

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SSD compatibility (Thermal Sensor Connector)

I have a 27" i7 iMac that I bought close to two months ago, and I would like to replace the internal HDD with an SSD, and I have a 2.5" to 3.5" form factor converter. The only thing I have noticed is that there is nowhere on the SSD to plug in the Thermal Sensor Connector. Do I just ignore it? Can I?

This is the SSD that I ordered: http://www.newegg.com/Product/Product.as...

I am currently booting off that SSD, which is connected via USB 2.0, and I believe that it's being bottlenecked by USB 2.0.

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Puan 20
41 Yorum

+ vote for the sheer effort

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Won't you get a lot slower bus speeds though, due to using USB over SATA?

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I just went ahead and put the SSD in with an ICY DOCK 2.5" to 3.5" HDD adapter. I just left the thermal sensor unplugged, and it works fine—but my computer thinks that the HDD is 128 degrees Celsius... which may or may not be a problem. http://grab.by/4fcM

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I used this as the 2.5" to 3.5" converter: http://www.newegg.com/Product/Product.as...

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+ Ralph

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OWC now has a cable with heat sensor that is designed to take care of this problem.

It works with iMac because the Mac system and hardware doesn't know that it isn't an Apple drive. OS updates will not affect this setup. I purchased my cable and drive adapter for a 27" mid 2011 iMac. I wanted to replace my standard internal HD with an SSD.

I have an e-SATA to lightning drive bay that will hold both 2.5 " and 3.5 " drives i use for backups and storage. I inserted the new SSD into the dock and formatted it using disc utility. I then used Carbon Copy Cloner.

I then rebooted iMac to the SSD to make shure it was a successful install. I booted up without any problem. Really darn fast load up and apps just cruise. Then i shut off iMac and begin the drive switch.

I watched their install video 2 times then replaced drives as instructed. No problem with the install process. Cable hooked up and sensor placed on the SSD. Reassembled and fired that puppy up and it worked. No worry about speeding fans or other controlling software. No fear of Apple updates messing with it.

This new cable for this is sold only by OWC as they have the sole rights to this cable and they make it themselves. The drive adapter is $35 which you need no matter what and their propritary cable $15.

Worth every darn cent!

Update (05/14/2016)

Runs at normal speed. The best thing i ever did to this iMac. I have placed SSD in 12 Mackbook Pro's and 7 IMac's and all have worked just great.

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Puan 4
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Following these instructions, I simply replaced my HDD with an SSD.

iMac Intel 27" EMC 2309 and 2374 Hard Drive Replacement

I simply diconnected the cable that normally connects between the HDD temp sensor socket on the main logic board and the HDD from the HDD, but leaving it plugged into the logic board.

I then stripped a CAT5 cable and cut a short wire out of one of the pairs and made a U shape and ran it in and out of the end of the cable that plugs into the HDD temp sensor location. I then put some electrical tape over it and left it coiled up inside.

My iMac now has an SSD in place of the HDD, and the fans are quiet.

Apparently this is how how Apple does it with models that come only with an SSD.

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Puan 18

2 Yorum:

This was a simple easy fix to the issue. Don't spend any money. A little piece wire is all you need.

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not an electrician..could you explain..jumped...If I'm using logic, do you mean...1 piece of wire that is attached from one end of terminal to another? Soldered???

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I purchased https://www.applecomponents.com/items/00...

which is a Optical Drive Temp Sensor, and it works.. tape it to the HDD just to the upper right of the sata plug on the back of the drive.. on the black aluminum; middle of the drive.(according to seagate, thats the optimal place for a temp sensor) and voila.. the answer..

How I came to this conclusion was, I originally took the optical drive thermal sensor from my ODD and put it on the HDD thinking this should work.. well the HDD temp and fans work perfectly.. and the ODD fan is at full blast.. so I tried to contact APPLE for the replacement ODD temp sensor.. Mistake.. and then I found the Link above.. and used it as a replacement.. TADA!!!

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Puan 5

12 Yorum:

Thanks Nick Butler!

I had a same problem. After installing SSD in my imac 27", HHD fan was running at 4200 rpm. The fan noise was just annoying. I ordered the Optical Drive Temp Sensor from Applecomponents.com and now the fan works perfectly.

SSD Rocks! It's so fast... and I love it!!!

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Best $20 fix you'll find ;)

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But totally unnecessary since SSDs don't overheat. :P

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Its not that its unnecessary.. its required for the fans to function properly..

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It's unnecessary because you can just short the connector with a piece of wire, which keeps the fans from going crazy, and won't fry your SSD, because they don't overheat.

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I had the same jet-engine-fan problem after an OWC SSD upgrade. ODD fan was going 4000rpm.

I used http://exirion.net/ssdfanctrl/ and it worked instantly.

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Puan 3

6 Yorum:

Well... almost a good solution ;-{ The rub here is any software solution kills your temp monitoring system so if your system heats up the fan's won't correctly rev up to cool the system down. Basically you're shortening the systems lifespan. Which is why the hardware solution is the better direction.

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You're absolutely right, Dan. My fault, I wasn't clear. The software was a temporary bandaid so that I could hear myself think and work until I had time to open the iMac up again.

Today, I solved the fan problem more permanently by taking the thermal sensor off the optical drive I had removed for the SSD and just sticking the sensor back in, attaching it to the SSD. Booted up. Everything is back to normal. Temperatures look good, fan speeds consistent with the temps and no 3rd party software necessary.

So, I'm definitely with you on the hardware solution. Software is a nice temporary patch, hence a free one is best.

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Where did you stick the senor tho? ssds dont have a port for it... I however replaced the actual hdd with an ssd, nightmare afterwards, full blast fans, no ssd fancontrol could fix it! i then took the snesor cable from hdd, stripped it, taped the two ends onto the OD, silent! seems hdd sensor now reads heat from od, however, ssd will never get warmer than OD so should be fine?

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this is the one. THANK GOD!!! I had an SSD for 3 years before it failed, and finally found this again, and it works perfectly. I also use SMC Fan Control because it shows temps in the upper right... but this one actually slows the HD fan down. Cheers!!!

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Ishbog, I would recommend you get OWC in-line thermal sensor as it's a better repair. Software over-rides have been found to stress the system as well as slowing a bit. Thats if you want your system to last.

OWC In-line Digital Thermal Sensor for iMac 2009-2010 Hard Drive Upgrade

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Hi,

Is the jumping cable and using the software alternative just as good as buying a whole new temp sensor cable?

Thanks

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Puan 1

1 Yorum:

You don't jump and use software. Jumping the sensor will "trick" the system into thinking it's running supper cold and keep fan at min. speed. Software solution will bypass the hardware sensor and ask the hard drive, via software, what it's temp is and then adjust the fans. The adapter with the temp-sensor built in would be used if you don't want to try either of the above. It's one of the above, not a combination. You COULD use the jumper with the software, but it's really pointless, you don't need the jumper if you use the software (software will ignore the jumped sensor.

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Thanks for the info everyone, I will try out your recommendations:

-Use Icy Box enclosure

-Short the thermostat if needed

-Use free ssdfanctrl software if fans run fast.

I have to say I have bricked (killed) a few iMacs trying to upgrade to an SSD.

Anyone else have the same experience or even a cure as to what the cause of death was :-)

Thanks

Big B

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2 Yorum:

First you don't need the more expensive icy box to hold the SSD. The standard 2.5 to 3.5 adapter frame is all that is needed. As to the thermal sensor, I use a spare optical drive sensor to use in place of the internal drive sensor found in the HD's.

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As this is such an old post most of the info here is very dated. We don't recommend using fan over-ride software as it tends to wear out the fans and/or shorten the systems lifespan. Using a replacement thermal sensor in this model is the best way. You will need to use the current Yosemite version to gain TRIM services which is now built in. You do need to be careful which SSD you buy as this systems SATA ports are only SATA II (3.0 Gb/s). Also make sure you check your systems firmware version and it's at the latest before you start.

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Just like to say.....if you leave it up to the system in order to adjust fan speed according to temp.....your GPU will overheat.....and are way worse off....thermal sensors are great so "I" can monitor my temps....fans full speed unless just everyday tasks...full blast even for playing video....imagine letting your engine wear out, because fan optimization was best and your electric radiator fan lasted a lot longer....fans are easy and cheap

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if you are replacing your old HDD with SSD and you don't want your fan to be noisy, just take off your old HDD control board from the top of HDD (6 small screws), plug in the temperature sensor cable and stick the board on top of your new SSD with double sided tape.

если вы меняете ваш старый HDD на SSD и не хотите что бы он шумно работал из за отсутствия датчика температуры, то снимите плату с верху вашего старого HDD диска , подсоедините к ней оставшийся шлейф температурного датчика и приклейте эту плату поверх нового SSD.

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Puan 0

1 Yorum:

This won't work as you still need to power the board and have a data connection. Remember the SSD is now using this connector!

Best to just bite the bullet here and get the OWC In-line Digital Thermal Sensor for iMac 2009-2010 Hard Drive Upgrade

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is Dan selling the converters? is this his promo thread to sell them? The converters seem to perform the same function as the jumped terminal. Does anyone have specifics on jumping the terminal?

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Puan 0

3 Yorum:

Dan is not selling any "converters". He is one of the most helpful posters here on iFixit. Read the thread.

As @danj has said: if you want to save money opt for an optical drive sensor in place of the internal drive sensor.

@danj - since this post is dated, and I am doing a repair on one at the moment -do your thoughts on the above still stand? Thanks

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Boy! I should have gotten a farthing or two for all of the people I've aimed to OWC!

Sorry, I don't make a nickel here or with any product I've aimed people to on the IFIXIT site. I only aim people to products I've personally used and know is the best product for the task at hand. I also try to dissuade people from using the wrong products as well.

I've been in computers now for over 45 years so I've been through the mini's (Wang, Dec & Sun) to mainframes (IBM) to super computers (IBM, ThinkingMachine & Cray). Before the Mac I had IBM & Compaq PC's and I've had a Mac from the very start and have had quite a few over the years. And I service mostly Mac systems for the last 15 years.

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@sys0s - I'm still using the OWC in-line thermal sensors as needed for the different systems I work on.

Fan control software is still not the best direction. People misuse it!

It get back to how people take pills! If the label says take one, how often do we take two! Or, not follow the time point of waiting for the next dose! So they think cranking the fan up or fail to run it at all will be fine. They either kill there system or kill the fans.

Sadly, people don't understand how the system was designed and what it was designed to do. We use an older system to play the most processing intensive app or game and don't understand why the computer is overheating! Which it was not designed to run.

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I have the same iMac 27" i7 mid-2011 and it is new to me, refurbished, with an extended 2 yr. warranty.

When purchased, according to the specs only had a 1 tb HDD.

The NICE surprise is it also shows a 256gb Apple SSD TS256C installed (along with 8gb < 16 gb RAM and 1gb <2gb RAM on the video card - all surprise upgrades from Mac of all Trades!

ISSUE IS:

On both hard drives it shows

Link Speed = 6 Gigabit

Negotiated Link Speed = 3 gigabit

NOW... could this be reconfigured through a software solution, to run as fast as it should??

Update (01.08.2018)

Again-

On both hard drives it shows:

Link Speed = 6 Gigabit

HOWEVER it shows a

Negotiated Link Speed = 3 gigabit

...So clearly if two out of the three cables are supplying 6 GP/S

And the link speed reads an initial 6 GP/S on both HDD and SSD....

It would appear that they each have the proper port for that part of the configuration ( if one of them was in the optical Port, a starting link speed of 3GP/S, not 6, would show as the link speed)

- then there must be a different answer (possibly SOFTWARE configuration answer)?

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Puan 0

7 Yorum:

Sorry to say the drives someone put in (replacement) are just that 6.0 Gb/s drives. You would need to open the system and replace them with better drives.

If you do replace any drive I would focus on the SSD drive as thats your boot drive (run the apps here as well) and you might want to get a 500 GB drive.

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Thanks, Dan

I would just like to improve the negotiated link speed from 3 to 6 Gigabit on the SSD, as I believe it is capable with the hardware installed.

I'd seen a screenshot of someone who had done just that, and pointed out if it says that's the link speed is 6, you should be able to get the negotiated speed of 6 Gigabit out of it, as he did (but didn't describe in enough detail just how he accomplished it with this machine)!

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There are three ports on the logic board HDD, ODD & Spare. The ODD port is 3.0 Gb/s whereas the HDD & Spare are both 6.0 Gb/s ports.

So if the SSD is a 6.0 Gb/s part then its clear someone plugged in the SSD into the wrong port connection.

You'll need to follow this IFIXIT guide: Installing iMac Intel 27" EMC 2390 Dual HDD or SSD Drive jump to step 23 so you male sure the SSD data cable is plugged in correctly.

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Again-

On both hard drives it shows:

Link Speed = 6 Gigabit

HOWEVER it shows a

Negotiated Link Speed = 3 gigabit

...So clearly if two out of the three cables are supplying 6 GP/S

And the link speed reads an initial 6 GP/S on both HDD and SSD....

It would appear that they each have the proper port for that part of the configuration ( if one of them was in the optical Port, a starting link speed of 3GP/S, not 6, would show as the link speed)

- then there must be a different answer (possibly SOFTWARE configuration answer)?

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My 2011 27" iMac had a SATA II (3.0 Gb/s) drive when I bought it. I replaced it with a SATA III (6.0 Gb/s) and it does link up at the fill 6.0 Gb/s. I did at the time needed to install a firmware update iMac EFI Update 1.6 You'll need 10.6.x Snow Leopard on your system. Later Apple automatically updated the firmware during the OS updates so if you hadn't done the patch it was done for you About EFI and SMC firmware updates for Intel-based Mac computers this is quite old as Apple has been doing firmware updates during the OS upgrade process (since Mavericks). Thats why you shouldn't need any software updates.

I would double check the specs of your drives as I'm suspecting you really have SATA II disks. Your system wants to use SATA III which is why it's saying it's offering the connection but the device can only do SATA II (negotiated).

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Funnily enough, I swapped out the HD for an SSD and my fans aren't going crazy and appear to be working normal (some airflow out the bottom of the iMac) without the thermal cable or software. I'm doing some heavy production work and the fans kick on after a n hour or so, but turn off once I'm done.

I think I'll wait and see what happens.

Edit: I just realized this is a really old thread.. maybe iMacs are smarter now-a-days.

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Puan 0

6 Yorum:

@grandmaster_m - The newer 2013 models with the newest firmware and newer drives don't need the SMC thermal sensor.

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Same with my 2010 iMac. I followed the 2N3904 route (transistor as a sensor) because I didn't want to leave the SSD completely unmonitored, but the fans were running quietly even with no thermal control.

The high-speed fans issue seem to happen only with the 2011 iMac.

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@il_biggo - You may have mis-wired things or have another problem. The 2010 models all require the sensor.

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I had simply shorted the connector and installed one of the various fan control utilities before using the transistor.

I didn't actually try not putting anything in. I gather most people have issues even with the bridge - I may have misunderstood, though.

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ha, thanks Dan.

I have a 2015 iMac and the fixit instructions on how to swap the HDD still says to get a sensor cable. I'm glad I didn't waste the money. Thanks!

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Sorry for the late post, but I have a quick fix. You just need a dremel like tool and some scissors.

There are 4 connectors on the adapter but only 2 are required. I just cut it in half to get rid of that.

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After you’re left with 2 connectors, use a dremil on the open side where the connectors are. Just make a small enough incision to give breathing room for second connector (black wire in my case).

After that the connectors should be a tight squeeze but just push it on the bottom row of pins(right 2 pin, not the left) on the HDD. My fans have been running at a quiet speed for the last hour.

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See the attached photos and feel free to ask any questions. Instructions are a bit confusing but photos should help show what I did.

Side note: Grey wire should be on the top once the drive is installed.

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