can CPU cores die?

[tatsu99]

hello!
i was reading the review of i5 6500 and in one paragraph Rich Leadbetter has stated that:

Kicking off with basic benchmarks, the stock Core i5 6500 offers few surprises, essentially offering 90 per cent of the performance of a stock-speed i5 6600K, a statistic that curiously drops to 85 per cent when running x264 video encoding. Up against the Core i7 6700K with its extra speed and hyper-threading capabilities, the Core i5 6500 lags significantly behind, even with the 4.51GHz overclock in place. But there are some curiosities here - we managed to push the 6600K to 4.5GHz before one of the four cores gave out, and here we see that the overclocked 6500 is actually faster, and that may well be down to the fact that overclocking base clock speeds up the whole chip, which doesn't happen with the K chips, where typically only the multiplier is increased.

from: http://www.eurogamer.net/articles/digitalfoundry-2016-intel-skylake-core-i5-6500-review

"we managed to push the 6600K to 4.5GHz before one of the four cores gave out"
can CPU cores die? will intel replace them if this happens?

 

[jaslion]

hello!
i was reading the review of i5 6500 and in one paragraph Rich Leadbetter has stated that:

Kicking off with basic benchmarks, the stock Core i5 6500 offers few surprises, essentially offering 90 per cent of the performance of a stock-speed i5 6600K, a statistic that curiously drops to 85 per cent when running x264 video encoding. Up against the Core i7 6700K with its extra speed and hyper-threading capabilities, the Core i5 6500 lags significantly behind, even with the 4.51GHz overclock in place. But there are some curiosities here - we managed to push the 6600K to 4.5GHz before one of the four cores gave out, and here we see that the overclocked 6500 is actually faster, and that may well be down to the fact that overclocking base clock speeds up the whole chip, which doesn't happen with the K chips, where typically only the multiplier is increased.

from: http://www.eurogamer.net/articles/digitalfoundry-2016-intel-skylake-core-i5-6500-review

"we managed to push the 6600K to 4.5GHz before one of the four cores gave out"
can CPU cores die? will intel replace them if this happens?

Yes they can die and if they discover it is because you overvolted or something like that then they may refuse warranty.

 

[Geekwad]

Couple this with the fact that overclocking has become so highly overrated on new equipment:

http://www.anandtech.com/show/9533/intel-i7-6700k-overclocking-4-8-ghz/8

http://ocaholic.ch/modules/smartsection/item.php?itemid=3948&page=3

That I'd only do it to do it (as a skill), not for more gaming performance......at least on Skylake (i7's especially).

 

[geofelt]

I really doubt that a single core will fail without bringing down the whole chip.
What I think the review meant was that one of the cores exceeded the throttling temperature which is about 100c.
It is common for different cores to have different temperatures.

Intel does have a 3 year warranty, and they are actually eager to get back failed chips for analysis.
The K was designed to be overclocked, and virtually all chips can do 4.5 with a tolerable vcore.

 

[dudeman509]

I had a bad core on a Phenom II. It would randomly crash the entire system. Disabling core #3 resulted in a completely stable computer.

 

[tatsu99]

I really doubt that a single core will fail without bringing down the whole chip.
What I think the review meant was that one of the cores exceeded the throttling temperature which is about 100c.
It is common for different cores to have different temperatures.

Intel does have a 3 year warranty, and they are actually eager to get back failed chips for analysis.
The K was designed to be overclocked, and virtually all chips can do 4.5 with a tolerable vcore.

so a unlocked chip will automatically downclock or stop working if the temps go above 100c? about the warranty, why do youtube overclockers say that overclocking the cpu can void warranty? i saw a video from paul's hardware in which paul said that ocing even k chips will void warranty.

 

[tatsu99]

I had a bad core on a Phenom II. It would randomly crash the entire system. Disabling core #3 resulted in a completely stable computer.

is core disabling present on intel cpus?

 

[tatsu99]

Couple this with the fact that overclocking has become so highly overrated on new equipment:

http://www.anandtech.com/show/9533/intel-i7-6700k-overclocking-4-8-ghz/8

http://ocaholic.ch/modules/smartsection/item.php?itemid=3948&page=3

That I'd only do it to do it (as a skill), not for more gaming performance......at least on Skylake (i7's especially).

you didn't notice any improvements at all?

 

[jaslion]

1. Any modern cpu will start down clocking itself when reaching the thermal limit or just shutdown the system when impossible to keep the temps down

2. You can disable cores on intel cpu's.

3. The increase in performance is program dependent some games use the cpu more and some use the gpu more. The cpu intensive games will benefit from an oc the gpu dependent games will feel less of an improvement.

 

[tatsu99]

1. Any modern cpu will start down clocking itself when reaching the thermal limit or just shutdown the system when impossible to keep the temps down

2. You can disable cores on intel cpu's.

3. The increase in performance is program dependent some games use the cpu more and some use the gpu more. The cpu intensive games will benefit from an oc the gpu dependent games will feel less of an improvement.

do different z170/z270 motherboards have different oc capability? offtopic question: at what settings can i run crysis 3/BF1 with a i5 6500+ GTX 1070/GTX 1060 6GB?

 

[Geekwad]

do different z170/z270 motherboards have different oc capability?

Yes, slightly.....but it's about the last few percentage of available overclock with serious cooling in place (think big custom water loop or LN2). Most all Z-boards will be able to handle 24/7 overclocks.

offtopic question: at what settings can i run crysis 3/BF1 with a i5 6500+ GTX 1070/GTX 1060 6GB?

do a YouTube search of: "My CPU" "My GPU" Gaming Benchmark "Game", to get a good idea....

https://www.youtube.com/results?search_query=Intel+i5+6500+GTX+1070+Gaming+Benchmark+Battlefield+1

 

[synphul]

It's unlikely but it's possible for anything or part of anything to fail. If it's manufactured it will fail at some point. As far as overclocking, the standard warranty doesn't apply. If you purchase their extended performance protection plan for around $25-30 depending on which cpu you've got and the cpu fails during overclocking they'll replace it.