what heat sink is with chip? (if there is one)

No heat sink or cpu cooler - Intel believe that anyone who buys an unlocked "K" version of this chip will use a third party cooler anyway. You'll need at a minimum a Coolermaster Evo 212 or equivalent.

Has anyone used this successfully with Windows 7, or are finding problems?

This i7 7700K will not be supported on Windows 7 - you will be warned that your hardware is not supported and you not receive any further windows updates at all - and you will receive occasional nagging warnings too. Do NOT buy the seventh generation Intel chips if you want to continue to use Windows 7 till 2020 (when that will not be supported either!)... I hate the tech world for this sort of redundancy - such an irresponsible waste... maybe I can tile my bathroom with these old CPUs in the future!

What do I need to buy alongside this to install it?

Nothing but your motherboard and a screwdriver

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Description

⚡ Power your productivity with the Intel i7-7700K — where speed meets precision!

8 MB SMART CACHE - Boosts data access speed, reducing lag and accelerating performance.
4 K ULTRA HD READY - Supports stunning 4096 x 2304 resolution across three independent displays for immersive visuals.
QUAD CORE POWERHOUSE - Four cores engineered to handle intensive workflows and seamless multitasking.
INTEL AVX 2 OPTIMIZATION - Enhanced floating-point performance for professional-grade computing and creative tasks.
BLAZING 4 2 G HZ CLOCK SPEED - Experience lightning-fast responsiveness for demanding multitasking and gaming.

The Intel Core i7-7700K is a high-performance quad-core processor clocked at 4.2 GHz, featuring an 8 MB cache and support for 4K Ultra HD displays. Designed for professionals and enthusiasts, it delivers optimized performance with Intel AVX2 instructions, enabling smooth multitasking, advanced computing, and stunning visuals across multiple screens.

Specifications

Brand	Intel
Product Dimensions	24.18 x 12.7 x 12.4 cm; 40 g
Batteries	1 Lithium Ion batteries required.
Item model number	BX80677I77700K
Manufacturer	Intel
Colour	Black
Processor Brand	Intel
Processor Type	Core i7
Processor Speed	4.2 GHz
Processor Socket	LGA 1151
Processor Count	4
Computer Memory Type	DDR4 SDRAM
Memory Clock Speed	4200 MHz
Hard Drive Interface	DMA
Wireless Type	802.11b/n/ac
Wattage	91 watts
Are Batteries Included	No
Lithium Battery Energy Content	2 Kilowatt Hours
Lithium Battery Packaging	Batteries packed with equipment
Lithium Battery Weight	2 Grams
Number Of Lithium Ion Cells	5
Number of Lithium Metal Cells	5
Item Weight	40 g
Guaranteed software updates until	unknown

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