I hate to break it, but looking up the Acer Veriton X4610G, I can tell you that it's way too small for a Hyper 212...unless you forgo the side panel, maybe. I have a pretty similar Acer machine (a Pentium-based one, likely a close relative), and I can attest to its small size. The stock CPU fan bumps right up against the PSU, so it's a tight fit for any cooler. As such, I'd be surprised if any cooler with a 120mm fan, unless very specially designed, would properly fit in this machine.
This could be a pretty hard situation, and I'll explain why: you most probably have an aluminum-base cooler, and your 95W Core i5 processor would benefit from a copper-base cooler...and it's gotta fit in the case, which likely limits your options greatly. Essentially, you have to hope that Acer made a PC akin to yours with a 95W processor.
Not to fear, because according to my research, the X4618G exists, and it comes with faster CPUs, such as the i5-2400 or i7-2600! If you can find a cooler out of one of these systems somewhere on eBay or the like, that would most likely do it, since it'd be a cooler prepared for the 95W TDP.
Another possibility would be a small, aftermarket cooler. I do see some on NewEgg that may do the trick.
I hope I've been helpful. Best of luck!