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Pros and Cons Dual Core vs Quad Core

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February 6, 2013 3:59:16 PM

Hello,
is there anybody who can explain why or why not a PC with 2 x 2,7 GHz CPU (e.g. HP Pavilion G7-2246SG) is better than a PC with 4x 1,9 GHz (e.g. HP Pavilion G7-2248SG)?
Greetings from Berlin,
Peter
a b à CPUs
February 6, 2013 4:45:47 PM

There is more to consider than just the frequency/speed of the CPU. . All of the cores on a multi-core CPU being run at full load will run at the exact same speed. If core 1 runs at 2.7 GHz, so does core 2. You get more cache with more cores, since each core has its own L2 cache and adding more cores also means you add more cache.

So, if you read the specs on these APUs (Accelerated Processing Units), both the A8-4500M and the A6-4400M have 1024 kb L2 cache; however, the A8-4500M has 4xL2 cache, whereas the A6-4400M only has 2xL2 cache. This makes the A8 capable of processing faster, as it can handle more load, despite having a lower clock speed.

Think of the processors in this scenario: You have 500 boxes to move. You have two options: 1. A car with 270 horsepower; or 2. A cargo van with 190 horsepower. While the car is capable of moving faster, it cannot handle as much load as the van, thus the van will get the job done faster.

I really don't want to take the time to find out what hardware manufactures HP uses in their systems, but apart from the APUs, these systems appear identical (RAM, HDD, etc). That said, the true value is what should ideally determine what makes one "better" than the other. If you are a serious multi-tasker, consider the quad core (A8-4500M). On the other hand, if you only want to use the computer for simple tasks such as web browsing while listening to music, go with the dual core (A6-4400M).
a b à CPUs
February 6, 2013 4:55:21 PM

man you'd be stupid not to give that guy up there the best answer^^
February 6, 2013 5:30:09 PM

T_T said:
There is more to consider than just the frequency/speed of the CPU. . All of the cores on a multi-core CPU being run at full load will run at the exact same speed. If core 1 runs at 2.7 GHz, so does core 2. You get more cache with more cores, since each core has its own L2 cache and adding more cores also means you add more cache.

So, if you read the specs on these APUs (Accelerated Processing Units), both the A8-4500M and the A6-4400M have 1024 kb L2 cache; however, the A8-4500M has 4xL2 cache, whereas the A6-4400M only has 2xL2 cache. This makes the A8 capable of processing faster, as it can handle more load, despite having a lower clock speed.

Think of the processors in this scenario: You have 500 boxes to move. You have two options: 1. A car with 270 horsepower; or 2. A cargo van with 190 horsepower. While the car is capable of moving faster, it cannot handle as much load as the van, thus the van will get the job done faster.

I really don't want to take the time to find out what hardware manufactures HP uses in their systems, but apart from the APUs, these systems appear identical (RAM, HDD, etc). That said, the true value is what should ideally determine what makes one "better" than the other. If you are a serious multi-tasker, consider the quad core (A8-4500M). On the other hand, if you only want to use the computer for simple tasks such as web browsing while listening to music, go with the dual core (A6-4400M).


Dear T_T,
I thank you very much for your comprehensible and implausible answer!!
Best wishes for you!
Peterhrichter
!