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Model A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2

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Replace HD with a compatible SSD

iMac intel 27" mid 2011 3.1GHz

Hello guys

Due to a fan defect in my iMac i now have to open and do some replacement. Therefore im going to change my HDD in that same procedure as well.

I dont want to have 2 harddrives but are rather looking for a solution where i can just replace the original one with an SSD, with a capacity between 500gb and 1TB.

I know that there is issues with the thermal sensor, and i have seen some previous questions regarding this on the forum, but since they are somewhat old, i take my chances to ask you if there is any SSD that is compatible with my imac, so that i dont have to spend more money and buy a sensor cable. Im from europe, which means that access to OWC is very limited, unless i want to pay toll (which i dont) :-) .

And btw, will it be a significant update? its a quite strong computer, but i feel that the HDD is the bottleneck.

Update (03/17/2016)

I was looking at this one, It says that there is a thermal sensor, but afaik the thermal sensor needs to be compatible??

http://www.bj-trading.dk/bjshop/default....

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Puan 0
3 Yorum

Please tell us why you think you have a fan defect. Has the hard drive been changed? I ask because there are hard drive temperature sensor issues with this machine that will cause a runaway fan, continuously running hard drive and eventual power supply burn out if not corrected.

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I have had several issues with this iMac, litterally everything is almost changed by extended warranty by apple, let me just list it for you:

- GFX card

- Inverter board

- LCD

- Power supply

The fan is the one that is sitting below the optical drive, i checked this with SMC fan control, and its evident. This is a new issue for me, and has been going on for around 3 months. I'm using this imac alot, and my hdd has more than 17 months running time.

As far as i know, this sensor issue is only present if i want to change the HDD to an SSD.

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@jeppechristensen12 - Sadly there is no SSD with the needed thermal sensor. You will need to use the OWC adapter (see Kevens answer for the link) to add in a replacement sensor so the systems heat management doesn't go crazy (if you are going with a SSD only solution).

While some folks have tried using software over-rides, over time we've learned they don't offer the needed protection as a hardware solution. Between burning-out the fan units, the thermal shock the delay and over run they create which wears out the logic board over time we don't recommend them.

See what Mayer can do to help you here to get to the root issue of your problem. Then revisit this after getting your system running. - Good Luck!

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Jeppe, Thanks for the clarification on the fan issue. There is a sensor for the optical drive but I do not think it's your problem. See step #11 of the optical drive fan replacement here: iMac Intel 27" EMC 2429 Optical Drive Fan Replacement

Also, please ask a separate question on upgrades as jumping back and forth can be confusing to some people (like me). I had this fan go out several times. It will cost more but I'd try to find a new one.

Apple Part# 922-9870

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Go ahead and replace the hard drive with an SSD, but attach this to solve the sensor issue:

http://eshop.macsales.com/item/OWC/DIDIM...

The Mounting Bracket to fit in your iMac is at this link:

http://www.amazon.com/gp/product/B005PZD...

PS. I love Samsung 850 EVO SSD - 500gb or 1TB recommended.

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1 Yorum:

i guess you have to read my question again :-) thank you for the answer though!

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Hello there. The thermal sensor connected to the hard drives in iMac's are there just to regulate the fan speed. In my experience removing those only cause the fan to run at high RPM's. Some can tolerate the noise more than others. Not sure how you feel about that.

SSD's do not need to have a sensor cable connected to them in order to work. You can install the SSD in the iMac without any issues with the correct bracket. However you should be sure to check the requirements from Apple using the serial number to see what the maximum allowable disk size is.

I hope this helps but if there is something I missed please let me know.

Bottlenecking is only due to limitations in the BUS speed. You should see a greater increase in speed with an SSD that is much more noticeable than the standard drive. This is true as SSD's also improve read write speeds on much older MacBooks and iMac's. You should be good to go.

Kind regards,

Michael

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7 Yorum:

Hello Michael, thank you for your answer! Im a freak about noise, im an audio engineer, and i cant have any noise in my studio. :(

- Anyway, when you talk about max requirements. Shouldn't i be able to fit an SSD with a capacity up to 1TB into it, as thats what i've always had initially?

When you dont mention any SSD's that i can just plug and play, i guess that means there isnt any?

In that case, What kind of sensor is used on the HDD? can i use a sensor like the one that monitors the optical drive or the casing temp? It makes it alot easier when im looking for one at Ebay.

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If you existing HDD was 1TB it should not be a problem to install a 1TB SSD into the iMac.

My apologies but I didn't see anything in your question about a plug and play SSD. But yes you can use an external SSD with a USB enclosure. But speeds will be limited to the speed of the USB port on your iMac.

The sensor cable is usually in the iMac and attached to the original drive. The link that was provided by the previous comment from another user should also be helpful.

http://eshop.macsales.com/item/OWC/DIDIM...

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Oh sorry, by plug and play i mean, no sensor issues! Sorry for my vague clarification :-(

The reason why im asking about the sensor cable, is that i cant order from OWC, im from europe

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@Mike - While its true the SSD does not get as hot as a hard drive, Apples heat management system (SMC) requires the HD sensor! Running the system without it will in fact wear-out the fan and the system as a whole suffers when the fan fails.

The OWC sensor is still the best option, using software over-rides has proven not to be as good on the long run. Between the lag in response and the over run it too tends to wear-out the fan and the system also overheats shorting it life.

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@Dan, you are hitting the nail here! What workaround should i do, if i cant buy from OWC? Ebay has alot of optical drive sensors that is pulled from imacs. So im thinking this might work, if i just attach a sensor like that on the hard drive? OR does it require another sensor that is compatible to that exact port?

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