OCR GCSE Computing: CPU - Topic 2 [OLD COURSE]

A video covering the central processing unit, including its function and three of its characteristics: clock speed, number of cores and cache size.

[DeBomBomZOMB]

You are single handedly going to save me from getting an F in my GCSE. Prise the lord for this marvellous creation

[SF-zkcp]

Hats off to this dude for putting the entirety of A451 in power point.  Thank you Computer Science Tutor. Amazing. Can't thank you enough...

[JBJohn]

Thank you so much hopefully I can achieve an A* in my 2017 exam because of you! Like if your doing the 2017 exam or new spec?

[notdeku]

Am i the only one here trying to squish two years worth of information in one night? Our teach sucks sooo bad, though he does have a wonderful beard.

[JaisulNaik]

thanks a lot for this. i was looking for someone similar to the 'mygcsescience' youtube channel for computing. 

[amayizingnicollama]

where have you been all my secondary school life!? My luck i find you a week before the exam

[oliviarah]

I haven't had a teacher since year 10 - we did all of our coursework about 6 weeks ago. We got left to learn all of the theory by ourselves and my lazy ass has only decided to start learning it about 2 days before the exam ^_^ this is really helpful so far. I hope to remember it all and get like a B

[xxPYROxxJONESxx]

Great videos, finding them really useful, just one small suggestion to overlay over the cpu AQA exam question; PC A has a higher potential clockspeed (as Ghz are defined for each individual core) so if if a piece of software can utilise all 4 cores then the total clockspeed at which instructions would be carried out would be 8Ghz. So On single core software PC B would be faster.

[LOLmnky]

These videos have been very helpful! I used them for my GCSEs last year and got an A*. I'm doing BTEC computing which now has exams; since it's new, resources are very difficult to come by. I decided to go back through your videos again since they're still relevent to my specification and figured I should make sure I still remember the basics of GCSE. Thank you so much! :D

[MrMahmoud]

*Thank you much I've just subbed right now lol you should have way more subs I'm definitely using your ocr videos to get me through my real GCSE exam in two months. I have a PPE mock today and I needed to revise this so so much ahaha thank you. I hope it goes well because I love computing* and it's my birthday today hahaha.

[reesesarkodie]

my exam is in less than 2 weeks... these videos are helping!

[radikab]

maybe if i watched these videos I wouldn't have got a D in the exam :))))

[hightreason]

Computing exam is next week I think by watching all of these videos hopefully I will do well. I got full marks in a452 and good marks in a453, so hopefully I can get an a star...

[selina]

Thank you much you deserve way more subscribers - does parallel computation mean when 2 or more processors are combined to solve a mathematical calcualtion?

[vincentng]

Thank you so much for the 100 % !! Super awesome videos :)

[nathanfish]

the bigger the cache doesn't neccesarily mean faster performance. it is faster than ram as it is small and close to the processor, which means it doesn't take very long for the processor to search through the cache in order to find what it wants. Increasing cache size means that this process will take longer as there is more data that the processor needs to search through. (still it is always faster than ram).

[ComputersAreRealCool]

I recently learned that for the last 17 years, for some reason they changed the definition of kilobyte:kilobyte is now 1000 bytes and they introduced the kibibyte, which is what a kilobyte was (1024). They did the same for terabyte, gigabyte, petabyte etc. Can somebody explain why they did this? It seems to me as if they got dumber instead of smarter, since firstly it was an industry standard so they just threw a bunch of extra confusion in there (we now don't know when someone says kilobyte if they mean 1000 or 1024 bytes), and they changed to using base 10 (10^3) instead of base 2 (2^10). I know kilo is used in base 10 to refer to 10^3, but in computer science (the only place you will ever use the term "kilobyte") you are almost always working in base 2, and obviously 1024 is more suited to this (2^10, there is no exponent of 2 for 1000). Can anyone explain a sensible reason they did this?

[theonerandomguy]

Why didn't i find your channel 3 hours before my exam?

[zebroar]

Is it OK if I use these to revise for edexcel? This is because you explain it better on your OCR videos than you do on the edexcel videos. I heard 90% of OCR is the same as edexcel.

[Nitroblast]

so you guys didn't have to look at all the internals of the cpu in this spec? (e.g. alu, cu, mar etc.)