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Inside the 24 inch iMac


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#21
Caslon

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!!!!!!!!!!!!!!!!!!!!!!!!!!!UPDATE!!!!!!!!!!!!!!!!!!!!!!!!!!!UPDATE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Tried the 7900 MXM video card. Don't work. Needs Mac firmware to boot. Any ideas let me know. I guess I will have to stick with the 7600 for now.

#22
non sequitur

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Does anyone know what kind of hard disk is in these things? I'm thinking of getting one, but I'd rather not replace the hard disk (added expense, though I could install it without problems). However, if it is a Western Digital model, I *have* to. {censored}tiest brand of hard disk ever. Three of my friends who have iMacs had their WD drive fail on them.

BTW...did you guys see that the old 32-bit 20" iMac is selling for around $1100? Great deal.

What would be better - a 2 GHz MacBook Pro ($2000), or a 2 GHz 20" iMac CD and a PowerBook G4 (around $2000 together)? I'm thinking the latter.


well, the macbook pro is basically a portable imac cd. id say definitely go for the latter unless you travel a lot and do graphic intensive work/game.

#23
Mackie

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I mainly do graphics work, and it would be good to have two computers. For instance, if I accidently drop my laptop (never happened before, but always a possibility :/ ), and I have the iMac/PB setup, I am $600 in the red and have an iMac to work on. If I drop the MBP, I'm $2000 out and have no other system to use.

There are lots of other advantages as well.

#24
Caslon

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Apple iMacs are great. There is a misconception though, that they are just laptops with biger screens. They are more like desktops than laptops. For instance they can have much higher heat tolerences so better chips can be used. I have a Macbook pro and several iMacs including the 24 inch Imac. My iMacs are much faster. The design toerences are more like a desktop than a laptop so they will always be less bottlenecks.

#25
Caslon

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More on the mod side. I exchanged processors in my 24" core 2 duo with my 20" core duo and both iMacs worked great. So the older Core Duo iMacs can take the 2.33 Core 2 Duo processors. Cool for the people who want to upgrade.

#26
vandetta

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Awesome, your sir are a brave soul.

Is it possible to determine what Intel chipset is being used? Northbridge and Southbridge?


As far as I know, both Northbridge and Southbridge chip should be on a Mainboard since both have their own jobs to make the computers running :)

#27
roland.g

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you said the drive is a seagate 250 but you put in a maxtor 500. what are the specs on the maxtor. on the seagate. i guess it should take a seagate 7200.10 500 16MB cache with perpendicular recording.

#28
roland.g

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only due to heat issues? otherwise what...

#29
Caslon

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Both drives are SATA II with 16 meg cache and 7200 rpm.

I just got a 500 gig seagate same specs that I will install today to check performance.

#30
Caslon

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Installed it. It boots faster. I used CCC to clone the Maxtor. So far so good.

#31
roland.g

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the seagate 500 booted faster than the maxtor 500, and yet you said that the pre-installed 250 is a seagate but the pre-installed 500 is a maxtor. is the seagate 500 that you installed a 7200.9 or a 7200.10?

#32
Caslon

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No, The 500 Maxtor I added after I removed the Seagate 250. I just got the 500 Seagate today and installed it. I used Carbon Copy Cloner to clone the Seagate to the same install as the Maxtor. Yes the Seagate has the same specs as the Maxtor, Exactly, but the Seagate boots faster by 7.5 seconds which to me is a vast improvment over the Maxtor. All my other Macs came with Maxtors installed in them. The 24" iMac is the first of the 5 Intel iMacs I own that came with a Seagate.

#33
Mackie

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Apple iMacs are great. There is a misconception though, that they are just laptops with biger screens. They are more like desktops than laptops. For instance they can have much higher heat tolerences so better chips can be used. I have a Macbook pro and several iMacs including the 24 inch Imac. My iMacs are much faster. The design toerences are more like a desktop than a laptop so they will always be less bottlenecks.


I think this has more to do with the fact that the iMac has a _decent_ hard disk. Laptops on the other hand use incredibly slow hard disks. I mean, even most MBP's have 5400 rpm drives. The other thing is that the GPU on iMacs runs at a faster clock.

That said, the MacBook Pro is the better system (not anymore - soon it will get Core 2 Duo though, then it will be equal to the iMac again). The 17" model for instance has a variable speed GPU. And you can always hook up an external Serial ATA-II raid via the ExpressCard slot (lightning fast!) which you can't do on an iMac. Also you can hook up a 30" display...you can't do that with an iMac either. ;)

#34
Caslon

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When did this become a Macbook vs iMac topic? I have almost all Intel models sold and each has it's special features. If you need a portable, buy one. If you want an incredible value desktop go for the iMac. If money is no object, buy them all and learn for your self, I did. Out of all of my systems, I use the 24 inch iMac the most right now. When I start encoding videos again I'll use my Mac Pro. If I travel then I'll use my Macbook Pro. Each has it's use.

#35
Caslon

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I don't know if it is a processor related thing or not, but I installed 3 gig of ram in an early 2006 20 inch Core Duo iMac that I had upgraded with a Core 2 Duo 2.33 processor and it read it and functioned without problems for two days worth of downloading and video encoding. When I put the original Core Duo 2.0 Ghz processor back in, it would not read the memory. Anyone have any clues?

I forgot to mention that I used 1X2Gb Stick and 1X1Gb stick to = 3Gb total.

#36
ThaSoulHacker

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So let me get this straight, a 20 inch Core Duo can support the following upgrades:

Processor: Any Core 2 Duo chipset using the same socket type as the Core Duo
Hard Drive: 500 GB SATA-II with 16 MB Cache at 7200 rpm
RAM: 3 gigs if using C2D processor is install
Graphics Card: only those supported by the latest Macs like the 7600.

Is this accurate?

What is the boot time from start to desktop with the HDD change?

Since the Quad Core will support the same socket as a Core 2 Duo and the Core 2 Duo works on Core Duo iMacs, then is it safe to say the Quad Core processors will work on the Core Duo iMacs? Also, if that is the case would it be better to wait for those or get a Core 2 Duo?

#37
Caslon

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The graphics in the 20 can not be upgraded. The processor is limited to the Mobile Core 2 Duo T7600 socket 479. So the fasted it will go is 2.33 Ghz as of now. Yes the hard drive, memory and processor are upgradable. The boot time is right at 17 seconds, it was 7.5 seconds longer with the Maxtor 500 gig. I my self am only testing these machines capabilities. I too will wait for the quads because I think they may work too. But for people who wait until the quads come out so they can snag a good deal on a Core 2 Duo this is handy to know. Not everyone needs a quad.

#38
ThaSoulHacker

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Cool. It's great to know the Core Duo iMac isn't dead just yet. It has a fair amount of life still left in it with upgrades. Not that mine needs those upgrades just yet, but I'm definitely doing it one Leopard comes out.

What's holding the graphics card from being upgraded? I was told I had the ATI Radeon X1600 (256MB) one in mine, but I only have the ATI Radeon X1600 (128MB). Can I atleast upgrade to the 256?

#39
Caslon

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The only iMac that the video card and video memory is not soldered to the logic board is the 24" iMac. That's why they are not upgradable.

#40
ThaSoulHacker

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Well I guess I'm out of luck on that then, but I guess since macs haven't been that upgradable in the past I can't complain too much if I get processor, ram, and HD upgrades.

I'm probably asking a stupid question or pushing my luck here, but is there any way to remove the soldering (with a kit or by taking it in to an expert) and then installing a new card? Or is there no socket and it's soldered on the same as the macbook processors.

My guess is nothing can be done without a high chance of damaging the board or the original card, but since you have so many macs and are willing to take them apart to find out this kind of info I figured I'd ask.

Also, my brother has the 24" iMac and since you said its graphics card is upgradable which cards can it upgrade to (either fact or speculation is fine)?





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