Can Core 2 Quad really perform better than Core 2 Duo?

Not logged inRybka Chess Community Forum

Forum RybkaChess Help Search Register Login

Topic The Rybka Lounge / Computer Chess / Can Core 2 Quad really perform better than Core 2 Duo?

By Dragon Knight (*)

Date 2012-05-20 05:07

Can Core 2 Quad really perform better than Core 2 Duo? if so,
how much better with same speed CPUs?
Let's say Core 2 Quad 3.6 GHz and Core 2 Duo 3.6 GHz, Is there any significant difference in performance?

By Sedat Canbaz (*****)

Date 2012-05-20 06:03

The below benchmark data is a comparison, as we see Quad is 2x times faster than Dual core
That means,you can get extra 40-80 Elo points (depending on conditions) in favor for Quad

In other words,you will have approx.50-60 Elo extra more, in case of doubling the processor speed

Hardware-Processor        Speed      Cores     kN/s
Intel Core 2 Q9450      @ 3.60 GHz     4      10604
Intel Core 2 Duo E6600  @ 3.60 GHz     2       5001

Best,
Sedat

By Dragon Knight (*)

Date 2012-05-20 07:12

Sedat,

Thanks for benchmarks.
I am a bit non-technical, How come Core 2 Quad 3.6 GHz is 2X faster than Core 2 Duo 3.6 GHz?
What exactly Quad Core means?
10604 KN/s, what is it? Does same chess engine think 2x better?

By Pia

Date 2012-05-20 08:15 Edited 2012-05-20 08:18

Duo and Quad is the numbers of Two and Four respectively, representing number of physical cores inside one CPU. Each core can be identified as independent CPU (but inside one physical CPU box and socket).
Quad (4) cores can work 2x times faster than Duo (2) given all the independent work they do is unique or it will be a waste evaluating same position twice or more times.

By Sedat Canbaz (*****)

Date 2012-05-20 09:07 Edited 2012-05-20 09:26

>Thanks for benchmarks.
>10604 KN/s, what is it? Does same chess engine think 2x better?
>How come Core 2 Quad 3.6 GHz is 2X faster than Core 2 Duo 3.6 GHz?

Not at all....

For example,10604 are kN/s speed values,which are generated by Fritz Benchmark tool

kN/s=kilo nodes per second

Of course, 4 core is faster and better for chess (than 2 core)
Simply because,Quad contains 4 cores,Dual contains 2 cores

Lets imagine...
Which Auto machine will be faster,if you drive:
60km per hour ?
or
120km per hour ?

Btw,nowadays is very popular (or best) the machines to drive with 30 km per hour :twisted:

   Name                         Elo    +    -  games  score oppo. draws
   Houdini 2.0b Pro x64 6c      3418   17   17  1049   68%  3305   46%
   Houdini 2.0b Pro x64 4c      3347   17   17  1030   51%  3344   47%
 
   Deep Rybka 4.1 x64 6c        3358   15   15  1363   59%  3305   54%
   Deep Rybka 4.1 x64 4c        3293   13   14  1602   47%  3314   56% 

   Fire 2.2 xTreme x64 6c       3311   23   22   530   52%  3297   63% 
   Fire 2.2 xTreme x64 4c       3275   16   16  1165   41%  3328   59%

Note:the above results are based on SCCT Auto232 Rating:
http://www.sedatcanbaz.com/chess/ratings/scct-auto232/

-----------------------------------------------------------------------

kN/s    Mate Processor              Speed  Cores L.P  EXE  Hardware User
21416   12s  Intel Core i7 980X     @4.33GHz  6  OFF  x64  Sedat Canbaz
10872   47s  Intel Core i7 920      @3.00GHz  4  OFF  x64  Sedat Canbaz

Note:the above hardwares are used for SCCT Auto232 Rating

For more Fritz/Houdini chess benchmarks can be found below:
http://www.sedatcanbaz.com/chess/fritz-chess-benchmarks/
http://www.sedatcanbaz.com/chess/1228-2/
http://www.sedatcanbaz.com/chess/houdini-2-0-benchmarks/

Regards,
Sedat

By Pia

Date 2012-05-20 07:18

But what if program lets two or more different cores/processes to evaluate same line and positions at the same short short time?
10% of time? 30? I heard that Rybka is evading counting same positions twice so her nodes speed don't grow linear after increasing number of cores,
but just to about 1.7x speed each 2x cores

Topic The Rybka Lounge / Computer Chess / Can Core 2 Quad really perform better than Core 2 Duo?