Questions before buying new CPU

[ThatcherHK33]

Hi lads i got some questions about a new cpu that i'm going to buy next month.(If its not the right place i'm so sorry).
1:I stuck between choosing I5 6600 and I5 7600K those two got pros and cons for me here some of them:
If i buy I5 7600k i will get more power (If i'm not mistaken its about %15) but i would need to buy new ddr4 ram with more expensive motherboard and I5 7600K is 110 usd more expensive than I5 6600.
If i buy I5 6600 i can use my ddr3 ram with it and i can buy other things like a new ssd and hdd.
2: I got a old gpu HD 6970 will 6600 or 7600k bottleneck it?
3: If they can does bottleneck physically cause damage to the parts?
4: Also i need a motherboard suggestion for those cpu's
End note: I'm sorry about my broken English i tried my best.
Edit: I forgot to mention 2 things
1: I have to buy those 2 parts
2: Buying from a website is not possible for me

 

[jowen3400]

DDR3L Has to be duel voltage I believe. Yeah you will be limited on GPU. With that budget I would look at 1600 AMD comes with a fan, DDR4 and a B350 board 353 USD from Newegg. But that is just me. Save and upgrade the Video card when can. Should be a TON of 570 on ebay soon

 

[jowen3400]

Where is a 6600K for 120 USD Anyway? Used? or not a K

 

[ThatcherHK33]

DDR3L Has to be duel voltage I believe. Yeah you will be limited on GPU. With that budget I would look at 1600 AMD comes with a fan, DDR4 and a B350 board 353 USD from Newegg. But that is just me. Save and upgrade the Video card when can. Should be a TON of 570 on ebay soon

Buying from newegg is not a option for me (tbh buying from any web site is not a option because the country i live in put product x 2 taxes.

Where is a 6600K for 120 USD Anyway? Used? or not a K

Its not for 120 dollar its around 300

 

[jowen3400]

Well DDR3L is end of life. So there is that. Also the 6600 NON k can't be OC'ed so there is that. I really would look at 1600 AMD with DDR4, even if you only get one stick of GB and add the second one later. and a B350 board. You get 6 cores and 12 treads. I really think that is a better option than the i5. For me here in hte US it is Cheaper than 7600k + a 212 + a z270 + RAM it is less by around 70 to 100 USD Ram for Ram. That is using the DDR4 3000

 

[jowen3400]

PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor ($197.99 @ SuperBiiz)
Motherboard: ASRock - Fatal1ty AB350 Gaming K4 ATX AM4 Motherboard ($83.98 @ Newegg)
Memory: G.Skill - Ripjaws V Series 8GB (1 x 8GB) DDR4-2800 Memory ($65.99 @ Newegg)
Total: $347.96
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-26 15:28 EDT-0400

I understand the price might not be what you can get.

 

[jowen3400]

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i5-7600K 3.8GHz Quad-Core Processor ($224.59 @ SuperBiiz)
CPU Cooler: Cooler Master - Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($26.88 @ OutletPC)
Motherboard: MSI - Z270-A PRO ATX LGA1151 Motherboard ($109.99 @ SuperBiiz)
Memory: G.Skill - Ripjaws V Series 8GB (1 x 8GB) DDR4-2800 Memory ($65.99 @ Newegg)
Total: $427.45
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-26 15:30 EDT-0400

 

[ThatcherHK33]

Well DDR3L is end of life. So there is that. Also the 6600 NON k can't be OC'ed so there is that. I really would look at 1600 AMD with DDR4, even if you only get one stick of GB and add the second one later. and a B350 board. You get 6 cores and 12 treads. I really think that is a better option than the i5. For me here in hte US it is Cheaper than 7600k + a 212 + a z270 + RAM it is less by around 70 to 100 USD Ram for Ram. That is using the DDR4 3000

Thanks for answer but as i stated recently sadly i have to pick from these two cpu's also 1600 amd series is around 410 dollars here so its bit expensive for me.