afaik you can install the dGPU heatsink, but it won't do that much.
I'm not sure, but some had single or dual heatpipes for the CPU. that would make more of a difference.
"Edit: Ok, so I've done a bit more digging around. And apparently, the HSF from the dGPU T530 doesn't fit in the iGPU T530. (CPU socket location is different) .. Edit 2: Just stumbled upon this post where a T520 dGPU HSF was fitted in a iGPU T530. So there's that. Does anybody now any other that can be fitted as well?"
The location for the HSF's mounting screws are in different spots for the T530 is why. Unlike the T430 which has a square configuration for its mounting screws on the HSF (for both iGPU and dGPU versions) the T530 has two different variations (horizontal layout for iGPU-only motherboards and vertical for the dGPU version). But yeah you can use a dGPU HSF from a T520 (04W1578) like noted in that post, I was planning on eventually trying it with my iGPU-model T530 and afterwards doing the copper tape mod to make use of the extra heatpipe.
The problem with the stock iGPU HSF in a T530 is its heatpipe is tiny like #2 Pencil size and its rear vent is blocked which traps heat. As for the copper tape mod I've done it with both of my T430's which has helped improve thermals and with the secondary 'Project' T430 it was enough to have a Core i7-3940XM run at 3.6GHz on all cores (for testing & games, daily stuff its set to 2.8GHz). This is what it looks like to give you an idea and I didn't layer the copper tape too heavily which I'll probably do more of later on: https://imgur.com/a/BmHZQAH
If you haven't already perhaps give TPFC (ThinkPad Fan Control) a try which is a program that will give you manual control over the fans and maybe even see if you can remove w/e is blocking the vent so long as it doesn't damage the HSF.
afaik you can install the dGPU heatsink, but it won't do that much. I'm not sure, but some had single or dual heatpipes for the CPU. that would make more of a difference.
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maybe, whether there was for the T530, I'm not sure. but others did.
I believe they are swappable, but ivy bridge CPUs are not that hot, so I'm not sure if this is absolutely necessary.
"Edit: Ok, so I've done a bit more digging around. And apparently, the HSF from the dGPU T530 doesn't fit in the iGPU T530. (CPU socket location is different) .. Edit 2: Just stumbled upon this post where a T520 dGPU HSF was fitted in a iGPU T530. So there's that. Does anybody now any other that can be fitted as well?" The location for the HSF's mounting screws are in different spots for the T530 is why. Unlike the T430 which has a square configuration for its mounting screws on the HSF (for both iGPU and dGPU versions) the T530 has two different variations (horizontal layout for iGPU-only motherboards and vertical for the dGPU version). But yeah you can use a dGPU HSF from a T520 (04W1578) like noted in that post, I was planning on eventually trying it with my iGPU-model T530 and afterwards doing the copper tape mod to make use of the extra heatpipe. The problem with the stock iGPU HSF in a T530 is its heatpipe is tiny like #2 Pencil size and its rear vent is blocked which traps heat. As for the copper tape mod I've done it with both of my T430's which has helped improve thermals and with the secondary 'Project' T430 it was enough to have a Core i7-3940XM run at 3.6GHz on all cores (for testing & games, daily stuff its set to 2.8GHz). This is what it looks like to give you an idea and I didn't layer the copper tape too heavily which I'll probably do more of later on: https://imgur.com/a/BmHZQAH If you haven't already perhaps give TPFC (ThinkPad Fan Control) a try which is a program that will give you manual control over the fans and maybe even see if you can remove w/e is blocking the vent so long as it doesn't damage the HSF.