Is upgrading from 10.6 Snow Leopard (I have install disk) to Yosemite possible?

Is upgrading from the 10.6 Snow Leopard disk to Yosemite possible? At all? I haven't built the machine yet - these are the parts I am looking at.

Type	Item	Price
CPU	Intel Core i5-4690K 3.5GHz Quad-Core Processor	$219.99 @ SuperBiiz
CPU Cooler	Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler	$26.89 @ OutletPC
Motherboard	Gigabyte GA-Z97X-UD3H-BK ATX LGA1150 Motherboard	$119.99 @ SuperBiiz
Memory	Crucial Ballistix Sport XT 16GB (2 x 8GB) DDR3-1600 Memory	$84.99 @ Adorama
Storage	Samsung 850 EVO-Series 500GB 2.5" Solid State Drive	$170.80 @ Amazon
Video Card	Sapphire Radeon R9 270 2GB Dual-X Video Card	$142.98 @ Newegg
Case	Corsair SPEC-02 ATX Mid Tower Case	$54.99 @ Newegg
Power Supply	EVGA 500W 80+ Certified ATX Power Supply	$34.99 @ NCIX US
Optical Drive	LG WH14NS40 Blu-Ray/DVD/CD Writer	$44.10 @ SuperBiiz
Operating System	Microsoft Windows 7 Home Premium SP1 OEM (64-bit)	$86.75 @ OutletPC
Wireless Network Adapter	TP-Link TL-WDN4800 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter	$36.00 @ SuperBiiz
Monitor	Asus VS24AH-P 24.0" Monitor	$191.99 @ SuperBiiz
Keyboard	Apple MB110LL/B Wired Standard Keyboard	$48.49 @ B&H
Other	(2x) Sandusk Cruzer Glide CZ60 8GB USB	$5.49
	Prices include shipping, taxes, rebates, and discounts
	Total (before mail-in rebates)	$1348.44
	Mail-in rebates	-$80.00
	Total	$1268.44
	Generated by PCPartPicker 2015-09-06 23:08 EDT-0400

submitted by morpty
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What is missing? Please comment to help!

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