Overclock core i5 vs base clock corei7

Overclock101 · Dec 5, 2015

Why is there a need to overclock core i5 with z170 when costs will bring the same as buying core i7 with h170 board? Speedwise i7 will be faster and more powerful. Overclocking may also possibly damage components and generate more heat. Overclocking memory will need for example a more costly memory like g.skills. z170 vs h170 board difference in cost can go for i7 in a stable base clock

Supahos · Dec 5, 2015

In many games an overclocked i5 beats a stock clocked i7, not always the case but is in some.

rolli59 · Dec 5, 2015

I7 is only faster if the application used can use the Hyper threading capability on top of using the 4 cores. This is presuming both CPU's have the same clock speed.
Voted up for the answer above because it did not deserve a negative vote.

computertech82 · Dec 5, 2015

It's basically people trying to squeeze everything out of the computer. It's usually like 2-8fps in gaming at best, and some games ZERO fps extra.
Now if you can get a HUGE overclock difference like 1ghz, that will show a decent performance gain. Most over clocks are usually far lower then that. http://www.overclock.net/ has/had users that really get into overclocking.

Note: oem heatsinks would be a BAD idea to use while overclocking.

Supahos · Dec 5, 2015

There is no stock heatsink with skylake k series chips

Tradesman1 · Dec 5, 2015

Supahos :

________________

+1

hard to use a 'stock' cooler if there isn't one

Supahos · Dec 5, 2015

Very much so.... The stock cooler really sucks on them... Almost like there isn't one

Tradesman1 · Dec 5, 2015

At least they aren't real ugly, just looks like nothing is there

nikoli707 · Dec 6, 2015

depends on the cpu. for instance skylake 6600k vs a locked 6700.... the i5 overclocked to 4.5ghz will beat an i7 at 4.0ghz(full single core turbo binned) in single thread obviously. in multithread the i7 still be limited by its turbo bins at i think 3.7ghz locked on all 4 cores. so thats 3.7ghz plus hyper threading vs 4.5ghz. if the application allows then the hyper threading can add maybe up to 20% performance at best. so as a rough estimate 3.7ghz becomes 4.4-4.5ghz effective per clock cycle bringing the i7 virtually equal to the i5 overclocked. that is an extremely simplified example, but it holds true in many benchmarks.

so yes and no, the i7 can match an overclocked i5, but it needs the right conditions. but for a vast majority of pc users though the i5@4.5ghz will be much faster than a locked i7 most of the time.

otherwise h170 vs z170 also discounts some memory intensive situations where 2133 will limit I/O where 2666 or 2800 and beyond kits will really shine, though they are not common for a vast majority of users.

Overclock101 · Dec 6, 2015

Thank you guys. @nikoli would u say an overclocked core i5 6600k (z170) will be a better buy than core i7 6700 (h170) assuming all other components are equal including the price?

For the same price(almost), if they can be at the same speed(almost), would you go for overclocking with maximized power and heat on the i5 6600k processor, memory than that of base clock of core i7 6700?

rolli59 · Dec 6, 2015

Overclock101 :

If it is mainly for gaming the I5 is a better buy!
If it is for productivity the I7 is a better buy!

Overclock101 · Dec 6, 2015

Overclocking brings out the extra speed of k processors, but if doing so(i5 6600k on z170) will cost the same as buying an i7 6700 on h170, I dont see any advantage on buying the i5 6600k processor. The i7 6700 will definitely be more powerful in gaming and productivity, without compromising stability, overusing processor, wattage consumption. I guess the advantage of i5 6600k will be seen if its price drops significantly including the z170 boards. Then it would make sense.

nikoli707 · Dec 6, 2015

you can get the new 4c8t xeon 1230v5 for much cheaper than the 6700.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Xeon E3-1230 V5 3.4GHz Quad-Core Processor ($253.99 @ SuperBiiz)
Total: $253.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-12-06 12:39 EST-0500

not sure where people think more cores helps in games. if that were true then the fx 8 core would be the best gaming cpu which even an i3 matches. even well optimized games still want the first couple cores going as fast as possible. the i5 is better for gaming and overclocked will match a locked i7 in productivity. but you do that at the cost of cpu heat and cooler noise. the higher end board may cost a bit more, but you usually get more features with that board as well even if you do or dont need them.

its really a toss up. overclocking can be fun. cool and quiet can be nice too.

Supahos · Dec 6, 2015

Some of the newest games do help fallout4/gtav for example. And as for that xeon... Good luck finding a board... The mainstream boards do not support skylake xeons

nikoli707 · Dec 6, 2015

what would give you the idea that an lga1151 socket cpu wont work with mainstream boards?

rolli59 · Dec 6, 2015

nikoli707 :

No XEON listed http://www.asus.com/us/supportonly/Z170%20PRO%20GAMING/HelpDesk_CPU/

nikoli707 · Dec 6, 2015

that happens with all new processors. a bios update and nomenclature changes should be the only thing thats needed. i dont see the 6960k or 6970k listed for support either but they will work as well just like 4970k will work on z87 boards. why would the cpu be for sale on newegg if there are no motherboard available for it? are they going to create a different different motherboard? never heard of such a thing.

Supahos · Dec 6, 2015

That and Intel specifically saying they won't be supported by the mainstream boards read up

nikoli707 · Dec 7, 2015

a socket is a socket, if it fits it works. thats how all cpus have worked for decades now. they would just simply change the socket revision if they didn't want it to work.

otherwise i will definitely read up on it, but i would find it extremely hard to believe an 1151 socket cpu wont work in an 1151 socket motherboard, makes absolutely no sense, would be something completely new in the cpu world, and very misleading by intel. even newegg pushes you toward 1151 motherboards for compatibility.

rolli59 · Dec 7, 2015

nikoli707 :

Read up on the lga 775 socket!
It is nothing new. It is not only the socket it has to do with chip set and BIOS support.

Supahos · Dec 7, 2015

This means that in order to use a Xeon processor, you need a server based chipset, such as the C230 series, rather than the 100-series found in consumer platforms. Several companies have confirmed that a ‘workaround’ in this case is most likely not possible.

http://www.anandtech.com/show/9730/intel-launches-greenlow-c236-chipset-and-skylake-e31200-v5-xeons

Speak what you know

nikoli707 · Dec 7, 2015

well i stand corrected. RIP xeon. i wonder why intel would cut off enthusiasts/gamers from the xeon? the past 4c8t xeons have been extremely popular cpus on many best bang for buck lists.

though i would somewhat agree rolli with the 775 socket situation, but that was an earlier chipset to a new chipset that was much much later in the production cycle.... similar to what we would think of z68 to z77 and z87 to z97, over a year inbetween. definitely not literally 3 months after the new architecture/chipsets are released. this is definitely a first.

Tradesman1 · Dec 7, 2015

nikoli707 :

___________________

This type of thing happens quite often, the mobo manufacturers need the CPUs to set up the mobos for them, earlier you mentioned a 4790K in a Z87 - and yes it will work - if you get a mobo with a proper BIOS version or can flash to one - when the Z97 mobos were first released, many had no support for the 4790K as it cam later than the the early release of the Refresh non-K models. P67/1155 mobos needed an update for Ivy bridge CPUs (and not all P667, H67 mobos even did updates for the newer IB CPUs as they were already somewhat considered 'outdated' since the Z68 mobos slid in between the P67 and the Z77

nikoli707 · Dec 8, 2015

yeah i totally understand that tradesman. but in this situation they seem to claim xeon will never work in any z170/h170/etc or future mainstream kaby lake "core i" designed board, ever period. only c230. furthermore i3/i5/i7 will not work in c230 chipset either as well.

Overclock101 · Dec 8, 2015

Thank you guys. I just realized that core i5 6600k has base clock 3.5ghz against core i7 6700 with 3.4ghz. Overclocking the i5 makes it faster than i7 6700 but with more heat generated. However its a good option to maximize speed. The cost may be the same as buying i7 6700 on an h170 but at least i get better features on z170. As nikoli also mentioned.

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