Top Liquid CPU Cooler for Intel LGA 775 QX9650
Top Liquid CPU Cooler for Intel LGA 775 QX9650
I can't imagine a scenario where it would be worth putting a liquid cooler on such an old CPU. Anyways, a Be Quiet! Silent Loop 280 or Corsair H100 (not H100i) are good liquid coolers with LGA775 support.
I hope you do realize you can sell your QX9650 for $80 to $100 on eBay. Depending on the motherboard. You can likely get anywhere between $50 and $130 for your motherboard. Plus $10 to $20 for your RAM. Depending on how much you have.
If you add all that to the cost of a good 240+mm AIO liquid cooler. Let's say $120 to $150. You'll have a total budget of $260 to $400. In either instance you can get a modern CPU, motherboard and RAM. Which will dominate that QX9650. Even with a maximum overclock on the QX9650. A lowly Pentium...
It depends on how you interpret best.
For some, it's about RGB and the GAMING aspect in the name.
Others focus on raw performance no matter the cost.
Some prioritize reliability, while others care about noise levels.
There are also those who balance performance with price.
So, for a decent liquid cooler, you can afford a system with better CPU, more memory, and RAM.
I don’t think there’s a situation where installing a liquid cooler would make sense for such an outdated CPU. Still, options like Be Quiet! Silent Loop 280 or Corsair H100 (not H100i) work well with LGA775 support.
You might be able to sell your QX9650 for between $80 and $100 on eBay, depending on the motherboard. Your motherboard could fetch around $50 to $130, plus $10 to $20 for RAM, based on your setup. Adding a decent 240+mm AIO liquid cooler would bring the total to roughly $120 to $150. That leaves you with a budget of about $260 to $400. You’d still be able to upgrade to a modern CPU, motherboard, and RAM, which would easily surpass the QX9650—even if overclocked.
A Pentium G4560 would handle single-core tasks well and match multi-core performance on the QX9650. For a full liquid-cooled system, you could go for a Pentium G4560 or a Ryzen 5 1400 (OC capable), paired with 8GB RAM and a Corsair H60 cooler. These options are simpler and more efficient than the QX9650’s requirements.
Upgrading to a modern CPU would also mean lower power consumption, support for newer standards like PCIe 3.0, USB 3/3.1, SATA III, M.2 NVMe, DDR4, possibly USB 3.1 Gen2, and UEFI. The CPU would also benefit from modern instruction extensions, delivering much better performance than the Core 2 in many scenarios.
What is your situation?
A premium liquid cooler requires placement in a properly ventilated enclosure.
What do you aim to achieve?
You might be aiming to push your system to its limits.
Your QX9650 features 4 threads, a passmark of 4176, and a single-thread rating of 1252.
A top-tier liquid cooler costs around $250.
To match that price point, consider a 4-thread G4600 CPU with a 5218 rating and a single-thread rating of 2076.
Single-thread performance is crucial for gaming.
And... the $250 price includes an LGA1151 motherboard and 8GB of DDR4 RAM.
I also appreciate antiques, but using a stock cooler diminishes their value.
The water loop can be shifted forward to another system later, allowing for flexibility with a PSU or GPU. It's up to you how you manage it. Now regarding the negative feedback: water cooling isn't necessarily "colder" than air cooling. Both are constrained by the surrounding temperature. Water cooling can approach ambient temperatures more effectively if it's larger and equipped with additional fans or improved airflow. I recommend a Scythe Ninja 4 air cooler if space permits, or a Thermalright Macho series air cooler. A price range of $40 to $60 should suffice. You're unlikely to exceed 4.2 GHz with that setup anyway; a larger air cooler would be more beneficial. Once you go that far, increasing voltage and pushing the CPU will yield minimal improvement. Overall performance will still be limited by the chipset, RAM setup, and CPU. To get better results from a big air cooler, you'll need at least a 240mm system with strong fans and ample tubing—avoid using bubble hoses.