AMD vs Intel. SuperPI Calculation.

[Koka458]

What is so special about Intel's Core i3, i5, i7...???

 

Super score for 1M calculation :

i3 - 11 Seconds 

i5 - 9 Seconds 

 

FX-6300 - 22 Second!!

FX-8350 - 21.6 seconds!!

 

But gaming performance are almost same! How?

[zappian]

Because usually intel chips are recommended for games and games arent as multi core optimized as super pi

[harrynowl]

AMDs x87 floating point instructions suck on FX.

 

SuperPI is very much a legacy single thread benchmark and shouldn't be used to compare gaming performance.

 

[Koka458]

AMDs x87 floating point instructions suck on FX.

 

SuperPI is very much a legacy single thread benchmark and shouldn't be used to compare gaming performance.

 

What is x87 ?

[harrynowl]

What is x87 ?

It's an old instruction set for floating point maths, from the 90s IIRC.

[mathijs727]

What is x87 ?

 

 

It's an old instruction set for floating point maths, from the 90s IIRC.

google is your friend:

http://en.wikipedia.org/wiki/X87

[Koka458]

google is your friend:

http://en.wikipedia.org/wiki/X87

I have no idea what is that.....but I found a cute 6 MHz Intel 80287..

[Koka458]

So, why there is  a huge difference? Intel 9 seconds AMD 22 seconds?

[harrynowl]

So, why there is  a huge difference? Intel 9 seconds AMD 22 seconds?

Because AMDs implementation of x87 instructions isn't very good: http://www.xtremesystems.org/forums/showthread.php?286448-The-Book-of-Bulldozer-Revelations-Episode-2-%28SuperPI-x87%29

 

But you shouldn't care, SuperPI isn't the best way of measuring CPU performance.

[Koka458]

Because AMDs implementation of x87 instructions isn't very good: http://www.xtremesystems.org/forums/showthread.php?286448-The-Book-of-Bulldozer-Revelations-Episode-2-%28SuperPI-x87%29

 

But you shouldn't care, SuperPI isn't the best way of measuring CPU performance.

ok..