I wouldn't want to try cooling i7 12700 with flat cooler. I know they claim low TDP wattage rating but they pull way more when working hard. I've heard 190w and more under heavy load. GD09 has 2x 120mm vents on each side, but no vent in top over CPU. To cool CPU like 12700 we need to keep cool intake airflow separate from cooler heated exhaust airflow. Best way to do that is with tower cooler drawing in one side of case and out another so air flows from intake fan to cooler, thru cooler, and on out of case thru exhaust vent with or without exhaust fan. Most of my builds only use intake fans because for air to flow into a case they has to be same amount of air flowing out. It's basic physics. With flat / low profile coolers it's much harder to keep heated exhaust air from mixing with cool intake air. Best way is vent directly above CPU / CPU cooler / fan on top of CPU cooler. Even if you can find a cooler that will keep your 12700 cool in GD09 case it will likely be making so much noise you won't be able to hear movie/TV.
Short answer, I think you need to re-think your HTPC case and CPU choices and get something that's better suited to needs.
I don't have space for a larger case so need to find a solution for the Silverstone GD09 and was looking to use the Noctua NH-C14S cooler as their website indicates it can handle a 12700.
Would I be better dropping down to the i5-12600 CPU instead?
I don't do any gaming but want the PC to be able to handle [email protected] video streaming and video editing as well as basic internet browsing / MS365 work.
I currently have a 7 year old i7-4790s and as I'm paying out to upgrade my PC I want to feel that I'm getting a definite upgrade in terms of performance. Would the 12600 still feel like an upgrade against what I have now even though I'm moving from an i7 down to an i5?
Thanks for the input.
I've been looking at scaling back and now considering the i5-12600. Looking at the benchmarks on cpubenchmark.net the i5-12600 has a CPU mark of 20883 and last years i7-11700 has mark at 20530.
Am I understanding these numbers correctly - does that mean that the 12th Gen i5 is slightly better than the 11th Gen i7?
I've been looking at this cooler to fit in this same case ( although with an AM4 system) and according to noctua it's only 115mm tall in low profile mode.NH-C14S might just fit in your in case (spec is 139mm) but will have top of finpack tight against top of case .. meaning only airflow will be out ends of finpack which is then mixing into / heating up air flowing to cooler .. so pre-heated air going to cooler fan.
Case just isn't designed for airflow needed to cool 12600 .. unless you have a vent fit into case top directly over CPU so cooler like C14S is exhausting heated air out top thru that vent / or pulling cool air into cooler thru top vent. But even NH-C14S is quite limited cooling compared to bigger 'U' shaped heatpipe towers. C14S has 6x 6mm single ended heatpipes (evap on one end and condense on other) while tower coolers with 6x 6mm heatpipes have evap in middle (bottom of U) and evap sections on both ends. "U" shaped heatpipes move almost twice as much heat from base to fins as flat / low profile coolers do.
Why not scale back to CPU more suited to HTPC? CPU with 4x/6x cores and 8x/12x threads instead of crazy 12 core 20 thead i7 12700. Their is no reason to have that kind of power for HTPC use.