which CPU will worth to work around to build a new system?

[garen57]

I'm planning to build a desktop system for my 11 year-old grandson. The main idea is to build something to get him off the gaming console and let him learn to do a brain work. Sure, he'll play some games on it too, so I need to build something to be able to handle most of the games appropriate to his age and not to be too expensive. I never built before a system for gaming purpose and will appreciate your advice. I need to understand if I should start building the system around the motherboard or find a correct CPU first?
Which CPU will be a better choice:
CPU - i5-7600K Kaby Lake Quad-Core 3.8 GHz, LGA 1151 or
i5-8400 Coffee Lake 6-Core 2.8 GHz, LGA 1151

Motherboard - (no idea yet, usually I worked with Gigabyte boards before).

Thank you.

 

[kanewolf]

For gaming the higher clock speed of the 7600K will be better.

 

[Mammatus]

For gaming the higher clock speed of the 7600K will be better.

I would have to disagree with you. At stock speed, 8400 is faster than 7600k...

benchmark 1

benchmark 2

benchmark 3

Etc, etc, etc...

Yes you can overclock the the 7600k, but 1) will he overclock it. 2) to build an overclockable computer will be a lot more expensive (Z motherboard and decent cooler) and 3) overclocking it will bring it to the level of the 8400 (or slightly over at the very best)... On the other hand, 8400 has more core, more L2/L3 cache, is cheaper, newer (latest gen), and therefore, better upgradability path...

I would go for the 8400... But hey, i'm not the one pulling the money out of my pocket... ;-)

 

[kanewolf]

For gaming the higher clock speed of the 7600K will be better.

I would have to disagree with you. At stock speed, 8400 is faster than 7600k...

benchmark 1

benchmark 2

benchmark 3

Etc, etc, etc...

Yes you can overclock the the 7600k, but 1) will he overclock it. 2) to build an overclockable computer will be a lot more expensive (Z motherboard and decent cooler) and 3) overclocking it will bring it to the level of the 8400 (or slightly over at the very best)... On the other hand, 8400 has more core, more L2/L3 cache, is cheaper, newer (latest gen), and therefore, better upgradability path...

I would go for the 8400... But hey, i'm not the one pulling the money out of my pocket... ;-)

The OP has 2.8 for the clock speed of the 8400. I based my statement on his post rather than checking the clock speed independently. The base clock speed of the 8400 may be 2.8 but it does automatically clock to 4.0. I am not surprised it can beat the 7700K. on some benchmarks because it has two more physical cores. Even your first link, the 7700K beats the 8400 in some tests. Now that the cheaper 3xx series motherboards are available it is a much closer fight.
I don't think that either are a BAD choice. If the 8400 is available and cheaper, then go for the 8400.

 

[mdd1963]

With the plethora of 6 core cpus now available, no way I'd consider a 7600K-based rig today...

i5-8400/Z370 or R5-2600/B450......if both are same price, flip a coin...

 

[gingerrankin]

hello garen57:
Thinking about games, the first thing to decide is the GPU and, depending on this, the CPU and the mobo. In addition, the GPU is usually the most expensive of the rig. For the choice of the GPU it is essential to know the resolution of the screen you are going to use.
If you are going to use a 1080P screen or less resolution, a choice would be the GTX 1050 ti or better.
If you are going to use a 2K screen then you must get to GTX 1060 6G or higher.

For a GTX 1050 ti is enough a I3 8100 (intel) or a Rizen 5 1500x (or 1400).
For a GTX 1060 6G is enough a I5 8400 (intel) or a Ryzen 1600 (or 1600x or 2600 or 2600x).
Any cpu above these features is unnecessary, except if there is little price difference.

If you choose AMD you must buy a special 3200 speed DDR4 because ryzen is very sensitive to the speed of the ram.
If you choose Intel is enough 2666 DDR4.

Mobo: choose any mobo that fits your requirements (the cheaper one) except if you like overclock.
Intel: Chipset B360
AMD: Chipset B350 if you like o.c. and A320 if not o.c. (if not overclock is better you choose a "x" cpu (1500x, 1600x).