Yes, you can replace the video card independently its a bit more work as you need to take the logic board out and then separate the two parts.
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Video Card - [http://www.powerbookmedic.com/Intel-iMac-24-NVIDIA-GeForce-8800GS-512MB-Video-Card-p-17660.html|661-4664 MXM III, G92GT+/512MB GDDR3 (CTO)]. Here's the IFIXIT guide of a simular model on the steps of replacing the video card: [https://www.ifixit.com/Guide/iMac+Intel+24-Inch+EMC+2111+GPU+Assembly+Replacement/5214|iMac Intel 24" EMC 2111 GPU Assembly Replacement] so you can see the amount of work.
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Video Card - [http://www.powerbookmedic.com/Intel-iMac-24-NVIDIA-GeForce-8800GS-512MB-Video-Card-p-17660.html|661-4664 MXM III, G92GT+/512MB GDDR3 (CTO)]. Here's the IFIXIT guide of a simular model on the steps of replacing the video card: [guide|5214|iMac Intel 24" EMC 2111 GPU Assembly Replacement] so you can see the amount of work.
As to what else you might want to upgrade:
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You may want to upgrade the RAM to the max this system can support 6 GB.
You also may want to upgrade the HD to something larger. If you want some zip I would go with a SSHD hybrid drive. I would go with a [http://www.seagate.com/internal-hard-drives/desktop-hard-drives/desktop-solid-state-hybrid-drive/|Seagate Desktop SSHD]. What ever drive you do go with needs to run at SATA II (3.0 Gb/s) which is the limit of your system.
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Lastly, make sure your firmware is upto date. Follow this IFIXIT guide: [http://support.apple.com/en-us/HT201518|EFI and SMC firmware updates for Intel-based Macs]
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Lastly, make sure your firmware is upto date. Follow this Apple T/N: [http://support.apple.com/en-us/HT201518|EFI and SMC firmware updates for Intel-based Macs]
Yes, you can replace the video card independently its a bit more work as you need to take the logic board out and then separate the two parts.
-
Video Card - [http://www.powerbookmedic.com/Intel-iMac-24-NVIDIA-GeForce-8800GS-512MB-Video-Card-p-17660.html|661-4664 MXM III, G92GT+/512MB GDDR3 (CTO)]
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Video Card - [http://www.powerbookmedic.com/Intel-iMac-24-NVIDIA-GeForce-8800GS-512MB-Video-Card-p-17660.html|661-4664 MXM III, G92GT+/512MB GDDR3 (CTO)]. Here's the IFIXIT guide of a simular model on the steps of replacing the video card: [https://www.ifixit.com/Guide/iMac+Intel+24-Inch+EMC+2111+GPU+Assembly+Replacement/5214|iMac Intel 24" EMC 2111 GPU Assembly Replacement] so you can see the amount of work.
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As to what else you might want to upgrade:
You may want to upgrade the RAM to the max this system can support 6 GB.
You also may want to upgrade the HD to something larger. If you want some zip I would go with a SSHD hybrid drive. I would go with a [http://www.seagate.com/internal-hard-drives/desktop-hard-drives/desktop-solid-state-hybrid-drive/|Seagate Desktop SSHD]. What ever drive you do go with needs to run at SATA II (3.0 Gb/s) which is the limit of your system.
Lastly, make sure your firmware is upto date. Follow this IFIXIT guide: [http://support.apple.com/en-us/HT201518|EFI and SMC firmware updates for Intel-based Macs]
Yes, you can replace the video card independently its a bit more work as you need to take the logic board out and then separate the two parts.
Video Card - [http://www.powerbookmedic.com/Intel-iMac-24-NVIDIA-GeForce-8800GS-512MB-Video-Card-p-17660.html|661-4664 MXM III, G92GT+/512MB GDDR3 (CTO)]
You may want to upgrade the RAM to the max this system can support 6 GB.
You also may want to upgrade the HD to something larger. If you want some zip I would go with a SSHD hybrid drive. I would go with a [http://www.seagate.com/internal-hard-drives/desktop-hard-drives/desktop-solid-state-hybrid-drive/|Seagate Desktop SSHD]. What ever drive you do go with needs to run at SATA II (3.0 Gb/s) which is the limit of your system.
Lastly, make sure your firmware is upto date. Follow this IFIXIT guide: [http://support.apple.com/en-us/HT201518|EFI and SMC firmware updates for Intel-based Macs]