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<blockquote data-quote="pigoo3" data-source="post: 1709724" data-attributes="member: 56379">As already mentioned…most Apple computer models are &quot;closed systems&quot;.&nbsp; Where very little is upgradeable.&nbsp; With a &quot;Late 2009&quot; iMac (which is what you have)…the upgrades are mostly limited to the internal storage (hard drives and/or SSD's)…and the ram.&nbsp; There is the occasional Apple computer model that can have the graphics card or CPU replaced or upgraded (but these are more rare).&nbsp; As mentioned…many times everything is soldered to the logic board/motherboard…and not upgradeable or replaceable.And…in the cases where an iMac CPU or GPU is socketed (not soldered)…and is replaceable/upgradeable.&nbsp; The upgrades are usually VERY limited.&nbsp; Usually only able to use another CPU or GPU from the same &quot;generation&quot; of iMac.&nbsp; So for a &quot;Late 2009&quot; iMac…if the CPU or GPU was socketed…you would probably only be able to use a CPU or GPU from another &quot;Late 2009&quot; 27&quot; iMac.&nbsp; As far as logic board replacements/upgrades.&nbsp; Pretty much the same thing. Apple logic boards have very specific shapes, port locations, and wiring setups.&nbsp; Pretty much only a logic board from another &quot;Late 2009&quot; 27&quot; iMac will fit into a &quot;Late 2009&quot; 27&quot; iMac.&nbsp; There may be some exceptions to this rule.&nbsp; But very rare.Most Apple computers are in no way like Windows computers (desktop computers).&nbsp; Where the upgrade possibilities can be varied &amp; numerous.&nbsp; Even back in the pre-2005 days when Apple had more &quot;traditional&quot; desktop computer models.&nbsp; The upgrade possibilities were still very limited compared to Windows computers.- Nick</blockquote>

[QUOTE="pigoo3, post: 1709724, member: 56379"] As already mentioned…most Apple computer models are "closed systems". Where very little is upgradeable. With a "Late 2009" iMac (which is what you have)…the upgrades are mostly limited to the internal storage (hard drives and/or SSD's)…and the ram. There is the occasional Apple computer model that can have the graphics card or CPU replaced or upgraded (but these are more rare). As mentioned…many times everything is soldered to the logic board/motherboard…and not upgradeable or replaceable. And…in the cases where an iMac CPU or GPU is socketed (not soldered)…and is replaceable/upgradeable. The upgrades are usually VERY limited. Usually only able to use another CPU or GPU from the same "generation" of iMac. So for a "Late 2009" iMac…if the CPU or GPU was socketed…you would probably only be able to use a CPU or GPU from another "Late 2009" 27" iMac. As far as logic board replacements/upgrades. Pretty much the same thing. Apple logic boards have very specific shapes, port locations, and wiring setups. Pretty much only a logic board from another "Late 2009" 27" iMac will fit into a "Late 2009" 27" iMac. There may be some exceptions to this rule. But very rare. Most Apple computers are in no way like Windows computers (desktop computers). Where the upgrade possibilities can be varied & numerous. Even back in the pre-2005 days when Apple had more "traditional" desktop computer models. The upgrade possibilities were still very limited compared to Windows computers. - Nick [/QUOTE]

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