Confusion with new build - Motherboard & CPU Compatibility

Hey, this is the build I'm planning on getting:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4570 3.2GHz Quad-Core Processor (£136.79 @ Aria PC)
Motherboard: Gigabyte GA-B85-HD3 ATX LGA1150 Motherboard (£60.92 @ Amazon UK)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£59.98 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£39.50 @ Amazon UK)
Case: Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case (£78.48 @
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£11.80 @ Amazon UK)
Total: £387.47
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-30 12:14 BST+0100)
(GPU and PSU already purchased.)

While I was researching a bit, I found this information in the Gigabyte GA-853-HD3 manual:
"* Due to a Windows 32-bit operating system limitation, when more than 4 GB of physical memory is installed, the actual memory size displayed will be less than the size of the physical memory installed."

I'm completely confused by this, since the motherboard supposedly supports the Intel Core i5-4570 CPU, which is a 64bit Haswell CPU. Can anyone shed some light on what the above quote means, and if I need to change the motherboard?
2 answers Last reply Best Answer
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  1. Best answer
    Operating systems come in 32-bit and 64-bit variants. That quote means that no matter how much memory you install, a 32-bit system will not be able to use more than 4GB. This is why you should always get a 64-bit copy of Windows.

    And yes, those parts are 100% compatible.
  2. If you get an OS 32 bit, you limit your hardware to 32 bit for the cpu. 32 bit OS limits to 4GB ram.
    If you get a 64 bit OS, then it will run in 64-bit.
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