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Current version by: Dan ,

Text:

First I think you're not going to gain enough given the costs and the risks in opening this system.
I would strongly recommend you review the IFIXIT teardown for this model: [guide|17828|iMac Intel 27" EMC 2639 Teardown]. IFIXIT gave it a 5 out of 10 on repairability.
Here is the IFIXIT guide on removing the logic board which you must do to swap out the CPU: [guide|19650|iMac Intel 27" EMC 2639 Logic Board Replacement] Note their warning here '''Potentially Dangerous''' You will need to review the Teardown Step 5 on pulling the CPU.
Here is a good reference tool to see the performance differences between the systems: [http://www.everymac.com/ultimate-mac-comparison-chart/|Ultimate Mac Comparison Chart]. You will need to select the different models you want to compare.
Now one does need to look at the Geekbench performance numbers very carefully here as what the system can do in these tests does not reflect in the real world! Most Apps are not programed to leverage Hyper-Threading so you will only gain the raw performance of the i5 not the i7 numbers of the same design & clock speed. Basically you get very little benefit upgrading the current CPUs.
-'''I would strongly recommend you sell your system and get a new one Vs trying to upgrade it, it will cost less if you really need this level of permanence and I would jump to a Mac Pro Vs an iMac (which is what we are doing) as you will have much more head room to grow.'''
+'''I would strongly recommend you sell your system and get a new one Vs trying to upgrade it, it will cost less if you really need this level of performance and I would jump to a Mac Pro Vs an iMac (which is what we are doing) as you will have much more head room to grow.'''
As to the CPU's here is the breakdown for this system:
22 nm, 64-bit "Fourth Generation" Intel Core i5/i7 "Haswell" processor LGA 1155 (Socket H2)
Core i5 3.2GHz (I5-4570)
Core i5 3.4GHz (I5-4670)
Core i7 3.5GHz (I7-4771)

Status:

open

Edit by: Dan ,

Text:

First I think you're not going to gain enough given the costs and the risks in opening this system.
I would strongly recommend you review the IFIXIT teardown for this model: [guide|17828|iMac Intel 27" EMC 2639 Teardown]. IFIXIT gave it a 5 out of 10 on repairability.
Here is the IFIXIT guide on removing the logic board which you must do to swap out the CPU: [guide|19650|iMac Intel 27" EMC 2639 Logic Board Replacement] Note their warning here '''Potentially Dangerous''' You will need to review the Teardown Step 5 on pulling the CPU.
Here is a good reference tool to see the performance differences between the systems: [http://www.everymac.com/ultimate-mac-comparison-chart/|Ultimate Mac Comparison Chart]. You will need to select the different models you want to compare.
Now one does need to look at the Geekbench performance numbers very carefully here as what the system can do in these tests does not reflect in the real world! Most Apps are not programed to leverage Hyper-Threading so you will only gain the raw performance of the i5 not the i7 numbers of the same design & clock speed. Basically you get very little benefit upgrading the current CPUs.
'''I would strongly recommend you sell your system and get a new one Vs trying to upgrade it, it will cost less if you really need this level of permanence and I would jump to a Mac Pro Vs an iMac (which is what we are doing) as you will have much more head room to grow.'''
As to the CPU's here is the breakdown for this system:
-22 nm, 64-bit "Fourth Generation" Intel Mobile Core i5/i7 "Haswell" processor
+22 nm, 64-bit "Fourth Generation" Intel Core i5/i7 "Haswell" processor LGA 1155 (Socket H2)
Core i5 3.2GHz (I5-4570)
Core i5 3.4GHz (I5-4670)
Core i7 3.5GHz (I7-4771)

Status:

open

Edit by: Dan ,

Text:

First I think you're not going to gain enough given the costs and the risks in opening this system.
I would strongly recommend you review the IFIXIT teardown for this model: [guide|17828|iMac Intel 27" EMC 2639 Teardown]. IFIXIT gave it a 5 out of 10 on repairability.
Here is the IFIXIT guide on removing the logic board which you must do to swap out the CPU: [guide|19650|iMac Intel 27" EMC 2639 Logic Board Replacement] Note their warning here '''Potentially Dangerous''' You will need to review the Teardown Step 5 on pulling the CPU.
Here is a good reference tool to see the performance differences between the systems: [http://www.everymac.com/ultimate-mac-comparison-chart/|Ultimate Mac Comparison Chart]. You will need to select the different models you want to compare.
Now one does need to look at the Geekbench performance numbers very carefully here as what the system can do in these tests does not reflect in the real world! Most Apps are not programed to leverage Hyper-Threading so you will only gain the raw performance of the i5 not the i7 numbers of the same design & clock speed. Basically you get very little benefit upgrading the current CPUs.
-'''I would strongly recommend you sell your system and get a new one Vs trying to upgrade it will cost less if you really need this level of permanence and I would jump to a Mac Pro Vs an iMac (which is what we are doing) you will have still much more head room to grow.'''
+'''I would strongly recommend you sell your system and get a new one Vs trying to upgrade it, it will cost less if you really need this level of permanence and I would jump to a Mac Pro Vs an iMac (which is what we are doing) as you will have much more head room to grow.'''
As to the CPU's here is the breakdown for this system:
22 nm, 64-bit "Fourth Generation" Intel Mobile Core i5/i7 "Haswell" processor
Core i5 3.2GHz (I5-4570)
Core i5 3.4GHz (I5-4670)
Core i7 3.5GHz (I7-4771)

Status:

open

Edit by: Dan ,

Text:

First I think you're not going to gain enough given the costs and the risks in opening this system.
I would strongly recommend you review the IFIXIT teardown for this model: [guide|17828|iMac Intel 27" EMC 2639 Teardown]. IFIXIT gave it a 5 out of 10 on repairability.
-Here is the IFIXIT guide on removing the logic board which you must do to swap out the CPU: [guide|19650|iMac Intel 27" EMC 2639 Logic Board Replacement] Note their warning here '''Potential Dangerous''' You will need to review the Teardown Step 5 on pulling the CPU.
+Here is the IFIXIT guide on removing the logic board which you must do to swap out the CPU: [guide|19650|iMac Intel 27" EMC 2639 Logic Board Replacement] Note their warning here '''Potentially Dangerous''' You will need to review the Teardown Step 5 on pulling the CPU.
Here is a good reference tool to see the performance differences between the systems: [http://www.everymac.com/ultimate-mac-comparison-chart/|Ultimate Mac Comparison Chart]. You will need to select the different models you want to compare.
Now one does need to look at the Geekbench performance numbers very carefully here as what the system can do in these tests does not reflect in the real world! Most Apps are not programed to leverage Hyper-Threading so you will only gain the raw performance of the i5 not the i7 numbers of the same design & clock speed. Basically you get very little benefit upgrading the current CPUs.
'''I would strongly recommend you sell your system and get a new one Vs trying to upgrade it will cost less if you really need this level of permanence and I would jump to a Mac Pro Vs an iMac (which is what we are doing) you will have still much more head room to grow.'''
As to the CPU's here is the breakdown for this system:
22 nm, 64-bit "Fourth Generation" Intel Mobile Core i5/i7 "Haswell" processor
Core i5 3.2GHz (I5-4570)
Core i5 3.4GHz (I5-4670)
Core i7 3.5GHz (I7-4771)

Status:

open

Original post by: Dan ,

Text:

First I think you're not going to gain enough given the costs and the risks in opening this system.

I would strongly recommend you review the IFIXIT teardown for this model: [guide|17828|iMac Intel 27" EMC 2639 Teardown]. IFIXIT gave it a 5 out of 10 on repairability.

Here is the IFIXIT guide on removing the logic board which you must do to swap out the CPU: [guide|19650|iMac Intel 27" EMC 2639 Logic Board Replacement] Note their warning here '''Potential Dangerous''' You will need to review the Teardown Step 5 on pulling the CPU.

Here is a good reference tool to see the performance differences between the systems: [http://www.everymac.com/ultimate-mac-comparison-chart/|Ultimate Mac Comparison Chart]. You will need to select the different models you want to compare.

Now one does need to look at the Geekbench performance numbers very carefully here as what the system can do in these tests does not reflect in the real world! Most Apps are not programed to leverage Hyper-Threading so you will only gain the raw performance of the i5 not the i7 numbers of the same design & clock speed. Basically you get very little benefit upgrading the current CPUs.

'''I would strongly recommend you sell your system and get a new one Vs trying to upgrade it will cost less if you really need this level of permanence and I would jump to a Mac Pro Vs an iMac (which is what we are doing) you will have still much more head room to grow.'''

As to the CPU's here is the breakdown for this system:

22 nm, 64-bit "Fourth Generation" Intel Mobile Core i5/i7 "Haswell" processor

Core i5 3.2GHz (I5-4570)

Core i5 3.4GHz (I5-4670)

Core i7 3.5GHz (I7-4771)

Status:

open