Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

531 Questions View all

CPU upgrade 2.0GHz to 2.8Ghz ( C2D Extreme X7900 )

Well, I have an iMac 20'' ( ver. 7,1 - Late 2007 ). My CPU is a T7300 @ 2.0GHz.

Can I upgrade the processor to C2D Extreme X7900 @ 2.8GHz ?

Update

It's all ok! :-)

I work with iMac 8 hours per day and don't have any problem!

It's totally recomended to change the CPU ! I install Lion and works perfectly.

Answer this question I have this problem too

Is this a good question?

Score 6

Comments:

Apple iMac "Core 2 Duo" 2.0 20-Inch (Al) Specs

Identifiers: Mid-2007 - MA876LL - iMac7,1 - A1224 - 2133

by

I'm happy to find this thread.

I would like to lenghten the lifespan of my 2nd hand iMac 8.1 20inches.

It has already a Crucial 256 SSD and 6gb of RAM, but it would probably feel relieved from its Adobe-fatigues if upgraded to a bigger-bang CPU (a X7900 can be found on eBay for sth like 70 USD + shipping).

Now the questions:

- what about heat dissipation?

- what about power draw?

Is there something I should be warned about?

by

Please read some of the other posts; follow the instructions given and use heat sink paste. The system and heat sink can easily handle the new processor. Mine's been running flawlessly for over 5 years

by

I've been thinking about doing this too, but just not sure if the gains would be worth it. I currently have a 2.4ghz (2133), and this upgrade would bump it up to around 2.8ghz. Has anyone else made the jump from 2.4 to 2.8? If so, was there much of a difference? Was it worth the time and money to even do this?

by

Hi,

I'm planning the same upgrade.

Do you know if the X9000, X9100 or the QX9300 (quad core) will work?

Everybody here have upgraded successfully to an X7900, I would like to know if the newer processors will work.

Thanks!

Andrea

by

Show 1 more comment

Add a comment

21 Answers

Most Helpful Answer

Yes! I was able to swap out the processor on my T7300 20" mid 2007 imac to an X7900 by following the instructions for replacing the heatsink here:

iMac Intel 20" EMC 2133 and 2210 Heat Sink Replacement

When the heatsink is removed, the CPU is exposed. Turn the slotted screw on the socket 180 degrees to release the CPU and install the X7900.

I do have a caveat: The connectors on the wifi and bluetooth antennas are extremely delicate and hard to get off/on. I just unscrewed the daughter boards, there is enough slack to leave them attached to the antennas.

After the install and reassembly, the computer booted up fine, there were no settings to make, firmware flashes or any other special procedures, just turn it on and bask in the glory that is the Core 2 Duo extreme.

Update

Yeah, it runs just great. No heat issues or any glitches. The 64-bit geekbench score when from 2749 to 4239, an improvement of 54%. I also put a 4GB in one slot and a 2GB in the other for 6GB total RAM.

Was this answer helpful?

Score 9

Comments:

+ did you run benchmarks?

by

to John Mares:

I'm going to do the same thing one of these days (I've already bought the x7900 and I have you same iMac).

Is your Mac still working well? Have you noticed improvement in speed?

Do you have any other suggestions for me?

Thank you!

== Update ==

I've done it! I've bought the X7900 on eBay for 120 US Dollars and I've followed the guide for replacing the heat sink, the one linked by John Mares.

According to Geekbench I've gone from a score of 3133 before the upgrade to 4242 after the upgrade.

I've only used it for an hour now, but the difference in speed is clear. Everything is snappier. I'm happy!

I have 4 Gb of ram and I'm also planning to upgrade to 6 Gb.

Next year I'll buy an SSD, so that this iMac can continue to be my work companion!

by

I know this post is kinda old, but I just ordered my X7900 (100.80 on ebay) for my mid 2007 iMac that I just bought last week for $200.00!!!! on craigslist. perfect condition, not a scratch on it. Anyway, I was just wondering how your guys iMacs are running as of now with the X7900 in.

While its opened I also plan on putting a OCZ vertex 2 120GB SSD in.

Thanks for any replys.

by

Still running strong with the X7900. I'm impressed that you found the imac for $200...I'd love to find one of those!

by

I'm adding a post here to report a similar success. I just upgraded my 20" iMac Mid-2007 (EMC2133) C2D 2.00GHz (that's the T7300) to a spare C2D 2.6GHz I found in a Toshiba laptop I wasn't using much.

If you find this post and you're looking for compatible processors, you need a Socket P processor, that's μFCPGA-478 (the poster nicksmacandpchelp above is incorrect, they do not use a Socket 775). This upgrade isn't all that easy, so to make it worthwhile you'd probably want the 2.6GHz or 2.8GHz Core 2 Duo Extreme (X7900) chips; both are available second-hand online. I have read online posts stating the newer T9300 and T9500 processors might not work in this generation of iMac.

John Mares, I didn't have a problem with the antenna connectors using a spudger, but I've come across that size connector before. I got the hang of them after a while.

Thanks to all the posters here and to iFixit for an awesome guide.

by

Add a comment

I know this is an old guide, but just wanted to post that I just upgraded my old 20" iMac EMC 2133 from a 2.0 GHz T7300 to a 2.6 GHz T7800 and it works great. The T7800 was never officially offered in the iMac, but it was offered in the MacBook Pro of the same era, so the OS and firmware seem to know about it. Right now a used T7800 goes for about $21 while the X7900 still sells for $70, so it seemed like a good deal coming from 2.0 GHz.

At the same time, I upgraded the original (probably failing) hard disk to a 480 GB SSD. Running 10.10 the machine has gone from unbearable to actually useful for daily work. Pretty awesome for a 9 year old computer and bought me time to save up a little extra to upgrade to a Retina iMac instead of the standard res I would have bought today if the upgrade didn't work.

Edit - as requested, here is what my system profiler shows post-upgrade:

Block Image

And here is an image of the iMac all torn apart. This isn't an upgrade for beginners, but it's not really any harder than doing a logic board swap in most laptops - you just need the Torx drivers while most PC laptops stick with Phillips.

Block Image

Finally, here is the new CPU in its socket before thermal paste.

Block Image

Was this answer helpful?

Score 4

Comments:

Rory, well done. did you have to do any firmware updates?

by

I just plugged it in an it recognized it and booted right up. I may have updated the firmware somewhere along the line in the past, I don't really remember. I'll try to update my post with a screen grab of my system info with the firmware versions.

by

Add a comment

Well its done! The T9300 is in and macOS Sierra is running smoothly on my 2007 iMac. It does benchmark a little less than the X7900 but the T9300 runs much cooler. I will like to give it more time before I say for sure but I am thinking that it runs macOS better than the X7900.

Im not experiencing beachballs or lags like I was on El Capitan.

If anyone wants any more info just let me know. Im gonna work on it a few days and see how the experience is all around. And then do a final impressions in about a month

Was this answer helpful?

Score 4

Comments:

That's great news, nandor690, thank you!

About Sierra, did you installed it normally from the App Store? If so, this means that updates too will be automatic even if 7,1 iMac is not in the list of Sierra compatible hardware, right?

Is the process of upgrading the CPU the same as with the X7900 (thermal paste, and everything)? I did the X7900 upgrade some years ago, and I'm not sure to remember how I did it.

And yes, please, come back in about a month or so and tell us if everything is ok. Thank you!

by

Sorry, I forgot 2 other questions. Is there only one model of T9300 CPU or I have to pay attention to something when I buy it?

Also, do I have to replace the heatsink as I did when upgrading to the X7900?

Thank you!

EDIT: regarding the differences in the T9300 to buy, I just saw that I can buy different models called "slayy, slapv, slaqg…" . Is there really any difference for this update? Which one did you get?

by

Hey!! I started a new thread here: replacing X7900 to T9300 for macOS Sierra install Is it worth it?

It's more on topic about the T9300 and macOS.

by

Awesome...I'm doing this upgrade now...the SECOND CPU upgrade on my trusty old imac. Let's see how long it will last. I know I can at least get Sierra out of it.

by

Hi, John Mares. If you haven't seen it already, in this page

replacing X7900 to T9300 for macOS Sierra install Is it worth it?

nandor690 also explains how to change the wi-fi/bluetooth card to make the iMac compatible with Handoff and other recent MacOS features. I already made it too, and it's working really well.

P.S.

I decided to do my first iMac upgrade after I read YOUR first post about it in 2011! :-)

by

Add a comment

Just to update, its almost 4 years later that I posted here and the x7900 is working great for El Capitan. But I am moving on. I just ordered an E8135 cpu and am going to be installing it soon so I will then be able to install macOS Sierra on my 20" 2007 iMac. I am also going to be doing a wifi/bluetooth upgrade with a combo card out of a 2013 MacBook Pro.

**********UPDATE**************

The E8135 does not work. I think its because the FSB on the E8135 is 1066 and our 7,1 iMac FSB is only 800. I tried a few things but never got it to boot up completely, I am waiting on a T9300 now. which has the same FSB and supports sse4.1 for macOS Sierra. I will keep this thread updated when the parts come in on the 17th. Im also upgrading the wifi/bluetooth to a combo card from a 2013 MacBook Pro. So it should support handoff and continuity.

Was this answer helpful?

Score 3

Comments:

I just got my iMac 7,1 yesterday. I want to upgrade to Sierra as well. I am very interested if the E8125 works. Please report back :)

by

The T9300 seems to be working great. I just installed it about 5 hours ago and have macOS Sierra running.

by

Add a comment

I inherited an old iMac (A1224) mid-2007 20" Core Duo 2 2.0GHz, with the rock-bottom specs for this model.

I first bumped the RAM from 1GB to 4GB for $20.

Next, I bought a X7900 (pulled from a A1225 iMac) on eBay for $59 and replaced my T7300 CPU, using the iFixit guide. (It took about 2 hours.)

My Geekbench 3 (64-bit) score went from 2135 (T7300) to 2916 (X7900). While running Geekbench, the CPU temp went from 30 C up to 48 C (iStat menu). So I get about a 37% increase with the X7900 over the T7300, which is pretty much consistent with the Geekbench numbers reported on the Everymac website.

I'm currently running OS X 10.8.5 on this iMac, with Office for Mac 2008 installed. Both Word and Excel run noticeably faster with the X7900.

After a couple of days usage, I've experienced no problems with the upgraded iMac so far.

Was this answer helpful?

Score 2
Add a comment

So I don't think the E8135 will work because FSB is 1066 and 2007 20" iMac is 800. I thought it might just run it at 800 but it refuses to boot up all the way. Only $3 off eBay so no big lose.

I ordered a T9300 to try next. Still a step up from the X7900 and the FSB is 800 and it supports sse4.1. Will let you guys know the results when it comes in

Was this answer helpful?

Score 2

Comments:

Thank you. I did your same upgrade to X7900 (in 2011) and I'm still using that iMac. Let us know if you manage to success with T9300 and, if so, how much of an improvement it is.

by

I am having pretty nice success with the T9300. It seems to be running macOS Sierra real smooth at this point. I just installed everything today when I got the cpu

by

Add a comment

This depends on the system's firmware and the limitations for CPU's Apple has coded into the firmware of the system. Technologically it should work if the chipset agreed with it seeing as it's just LGA775 and Apple's pinout for it is no different from how everyone else does it.

You can try, but it may not work seeing as Apple never supported the EE CPU's officially.

Was this answer helpful?

Score 1
Add a comment

Also upgraded an 20" iMac 7.1 mid-2007 from a T7700 to a X7900 processor without any problem. Changed the original WD 320GB harddisk to a Samsung 830 SSD (128GB). Did'nt test benchmarks, but the system seems to work remarkable faster & because of the SSD the system becomes extremely quiet !

Was this answer helpful?

Score 1
Add a comment

Has anyone tested the iMac7,1 with any of the following Socket P chips? I selected chips that were "extreme", quad core or had a clock speed higher than 2.6GHz.

-

Montevina platform

2.53 GHz Core 2 Extreme QX9300 1066 MT/s 45 W

2.27 GHz Core 2 Quad Q9100 1066 MT/s 45 W

2.00 GHz Core 2 Quad Q9000 1066 MT/s 45 W

3.07 GHz Core 2 Extreme X9100 1066 MT/s 44 W

3.07 GHz Core 2 Duo T9900 1066 MT/s 35 W

-

Santa Rosa/Santa Rosa Refresh platform

2.80 GHz Core 2 Extreme X9000 800 MT/s 44 W

2.80 GHz Core 2 Extreme X7900 800 MT/s 44 W

2.60 GHz Core 2 Extreme X7800 800 MT/s 44 W

2.60 GHz Core 2 Duo T9500 800 MT/s 35 W

2.00 GHz Core 2 Duo T7300 800 MT/s 35 W

-

The QX9300 will not boot on an iMac8,1.

-

Source: http://www.dslreports.com/forum/r2737176...

-

A Q-Spec (qualification) X9000 will boot on an iMac7,1 but will underclock the processor to 400MHz and benchmark reflects a slower processor. No S-Spec (shipping) processor has been tested as of this writing.

-

Source: http://hexus.net/tech/features/systems/1...

-

A T9500 will boot on an iMac7,1 but "System Report" reports that the processor is 700MHz with a 400MHz FSB. Xbench reflects a part faster than the original T7300 that was installed.

-

Source http://forums.macrumors.com/showthread.p...

-

-

So the confirmed working parts on the iMac7,1 are the following

-

2.80 GHz Core 2 Extreme X7900 800 MT/s 44 W

2.60 GHz Core 2 Duo T9500 800 MT/s 35 W

-

I would love to include the 2.80 GHz Core 2 Extreme X9000 but no one has yet upgraded to a shipping part of this product yet.

While searching for a X7900 on eBay the seller was writing that he will be upgrading to a X9000 for his Dell M6300. I know it isnt an Apple product but they share the same Santa Rosa platform.

I am just doing preventive maintenance research in the event that I have to replace the HDD of my iMac in the future. May as well install a better processor with a faster HDD. May even swap out the MXM if it is feasible.

Was this answer helpful?

Score 1
Add a comment

Hi All,

FYI, I've "upgraded" my iMac 7.1 (Mid 2007 imac 24' 2.4ghz - T7700 intel chip) to an X9000 chip.

Result : iMac working and fully functional but slower than with the original T7700 chip (geekbench results : 1850 with X9000 and 3350 with T7700). Looks like the chip indeed is working at 400ghz, and that it's not only an "about this mac" report bug.

I tend to think that the Apple EFI / BIOS does not properly recognize the chip because it's never been written for it (The X9000 chip has never been officially listed in the iMac range).

=> back to original configuration....

Sorry guys...

Was this answer helpful?

Score 1
Add a comment

I upgraded my iMac 8,1 from a 2.4ghz E8135 to a 3.06ghz T9900

http://browser.primatelabs.com/geekbench...

Was this answer helpful?

Score 1

Comments:

How is the 3.06ghz CPU working for you? Does the system seem considerably faster?

by

Add a comment

This thread is great!

I installed an SSD in our iMac7,1 in 2012, and it has been the kids' workhorse, and a piano (USB 88-key keyboard), ever since. During that project, I also installed a C2D on the first-gen 2001 iMac.

Need Penryn for macOS Sierra, the Santa Rosa refresh.

Ordering my T9300....

Was this answer helpful?

Score 1

Comments:

Hey I started a new thread here: replacing X7900 to T9300 for macOS Sierra install Is it worth it?

It's more on topic about T9300 and macOS. I think if we move it there it will be easier to questions answered.

Nandor690

by

Add a comment

Hello!! I started a new thread here: replacing X7900 to T9300 for macOS Sierra install Is it worth it?

Its more about the T9300 and macOS. I thought it was time to move since this one seemed to be getting cluttered and the topic has moved from the X7900 to the T9300. If you have questions or concerns I think we should direct them to that thread

Nandor690

Was this answer helpful?

Score 1
Add a comment

Thanks for the reply. I was kinda worried about something burning up since it pulls about 12 more watts. The lady I bought it from upgraded to a 27" iMac and she had a lot of money. She told me she didn't really care what she got for it so I offered her $200 and she took it.

Was this answer helpful?

Score 0

Comments:

Well the upgrade went smooth as pie. :-)

I will install smc fancontrol tho, as the temps seem to get a little higher than I would like while using/installing curtain software.

by

Add a comment

I'm not for sure the types you're mentioning are socket 478 one's. This is a limmiting factor in the 7.1 iMac of course ... Otherwise: if the processors dissipated power is about 35-45 Watt I would give it a try !

Frank.

Was this answer helpful?

Score 0
Add a comment

Hi All,

I heard that Core 2 Extreme QX9300 doesn't work on imac 2008 (imac 8.1),

How about Core 2 Extreme QX9300 on iMac 2009 early model?

I am currently using iMac 2009 early model with Core 2 2.66ghz(e8135) and I am planing to upgrade my CPU. There are two CPUs (e8435 and qx9300) that I can choose. I don't really know how much differences between e8435 and e8135 (3.06ghz and 2.66ghz), but I believe 4 cores always better than 2 cores(qx9300 vs e8135).

Was this answer helpful?

Score 0
Add a comment

I finally sold my X7900-boosted Mid-2007 imac and got a late 2012 on ebay for $800. Time to move to the next level! I'll look at swapping the 2.9Ghz i5 with an i7 and report later. I got as much speed and work out of the old girl and I think is economically via, but it's time to move up to something that's supported a little better by the new OS X Mavericks.

Was this answer helpful?

Score 0
Add a comment

Here is a better link on replacing the CPU. I got a hold of a donated iMac 6,1. Bought a Samsung 250 GB SSD (840 EVO) and replaced one of the memory card to a 2GB, for a total of 3GB. I'm looking to replace the CPU to X7900 and to 6 GB with a firmware upgrade.

iMac Intel 24" EMC 2111 CPU Replacement

Was this answer helpful?

Score 0
Add a comment

Thermal design power of the T7300 is 35W, while the X7900 does a 44W. So yes: it may become warmer (or the cooling fans wil work harder). On the other way: your SSD draws less power than a conventional harddisk.

My 7.1 is upgraded since 2012 (X7900 + Samsung SSD) and I've experienced no problems (24/7 in use).

Don't expect to much advantage: benchmark of the T7300 is '1199' while the X7900 reaches '1704'.

Was this answer helpful?

Score 0

Comments:

Does your upgraded processor support macOs Sierra?

by

stephennewell - The CPU alone is not what stops you here. If you review the EveryMac web site it can offer you some useful info. Here's your systems specs: iMac 20" 2.26 GHz Core 2 Duo (Mid-2009). The limits you face here is the amount or RAM and what the installer see's from the systems BIOS (EFI). The installer is programed not to install the OS on your system. While there are ways to get around this some features just won't work as the hardware doesn't have then needed pieces.

Frankly, I would just stay at the older El Capitan 10.11.x release which is the last supported. Save your pennies! And look at a newer system (new or used) if there is something in MacOS Sierra that you want.

by

It can but it's not as easy as just installing macOS as you normally would. You would also need to upgrade your wifi/Bluetooth. But if you're upgrading your CPU then upgrading your wifi card is a piece of cake

by

You can upgrade these iMacs to macOS Sierra. I started a new thread about it here: replacing X7900 to T9300 for macOS Sierra install Is it worth it?

It's more on topic and I think it will be easier to get questions answered

Nandor690

by

Add a comment

A 3.07 GHz 6MB Core 2 Duo E8435, appears to also work in these macs. I believe the CPU is slightly faster than the X7900. I did the exact same upgrade mentioned in iMac 2008 20inch - CPU upgrade

Was this answer helpful?

Score 0

Comments:

They don't. the fsb is 1066 and the 7,1 iMac only supports 800

by

Add a comment

I successfully did it.

Toady i finally tore apart my 20inch iMac and replaced the 2.66 ghz CPU with a 3.06 one.

It runs, and the replacement of the conductive compound looks like making the heatsink work better. LOOKS....

Was this answer helpful?

Score 0
Add a comment

Add your answer

John will be eternally grateful.
View Statistics:

Past 24 Hours: 16

Past 7 Days: 104

Past 30 Days: 267

All Time: 38,048