Is your P4 feeling sluggish?

Prime95 · 2003-02-20, 04:19

If so, watch "the latest client software" thread tomorrow. If the mersenne.org FTP site we're up you could make your P4 perform like a champ right now!

dswanson · 2003-02-20, 05:18

What a tease!!! Are you going to give us more details, or do we just have to suffer till the morn?

Ian_H · 2003-02-20, 11:42

Drooling and waiting... ;)

lycorn · 2003-02-20, 11:58

I´m using a P4 1,6 GHz (with SDRAM, not DDR) that performs decently when LLing (0.038sec/iter on 9M exponents), but is real crap at Trial Factoring! I´m currently doing some TF up to 59 bits on the 46M range, and this P4 1,6 has exactly the same performance of a P3-700 I´m also using

. I knew P4s weren´t that good at TFing, but I never supposed them to be *THIS* bad. Is this normal? Will the new version do something about this?

Xyzzy · 2003-02-20, 12:36

The SSE2 optimizations for factoring don't kick in until 64 bits... I have found that a 1.5GHz XP is 2x faster at factoring to 63 bits than a 2.4GHz P4... (Of course, once you hit the optimizations the P4 smokes the XP!)

whilden · 2003-02-20, 13:21

/me eyes 40+ghz of P4 devil

lycorn · 2003-02-20, 13:47

Xyzzy wrote:

The SSE2 optimizations for factoring don't kick in until 64 bits...

Yeah, I´m aware of that. And it doesn´t surprise me at all that the XP is a lot faster than the P4 as long as we keep SSE2 out of the way. What I found amazing was the comparison between the P4 and the P3, specially at less than half of the clock speed...

Xyzzy · 2003-02-20, 14:36

The P3 has a pretty decent floating point unit, especially compared to the P4... It isn't as kick-ass as the XP's FPU, but it is decent...

To get the P4 to scale so high in frequency, Intel had to make a lot of compromises!

QuintLeo · 2003-02-20, 14:40

I ahve to wonder if this is over and above the 23.1 improvements.

*waiting impatiently*

9-)

roy1942 · 2003-02-20, 18:00

Hey, the FTP site seems to be up now! Where's the new stuff?

Our patience has been 'worn out' watching LL tests go "1.00%....1.01%..." and we have none left. We want our new software now!

JC · 2003-02-20, 18:24

Version 23.2 has been posted. Read the whatsnew.txt.. :(

2003-02-20, 04:19	#1
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 2·53·71 Posts	Is your P4 feeling sluggish? If so, watch "the latest client software" thread tomorrow. If the mersenne.org FTP site we're up you could make your P4 perform like a champ right now!

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2003-02-20, 05:18	#2
dswanson Aug 2002 11001000₂ Posts	What a tease!!! Are you going to give us more details, or do we just have to suffer till the morn?

2003-02-20, 11:42	#3
Ian_H Aug 2002 Europe 30₁₀ Posts	Drooling and waiting... ;)

2003-02-20, 11:58	#4
lycorn Sep 2002 Oeiras, Portugal 2⁶×23 Posts	I´m using a P4 1,6 GHz (with SDRAM, not DDR) that performs decently when LLing (0.038sec/iter on 9M exponents), but is real crap at Trial Factoring! I´m currently doing some TF up to 59 bits on the 46M range, and this P4 1,6 has exactly the same performance of a P3-700 I´m also using . I knew P4s weren´t that good at TFing, but I never supposed them to be THIS bad. Is this normal? Will the new version do something about this?

2003-02-20, 12:36	#5
Xyzzy "Mike" Aug 2002 2⁵×257 Posts	The SSE2 optimizations for factoring don't kick in until 64 bits... I have found that a 1.5GHz XP is 2x faster at factoring to 63 bits than a 2.4GHz P4... (Of course, once you hit the optimizations the P4 smokes the XP!)

2003-02-20, 13:21	#6
whilden Aug 2002 29 Posts	/me eyes 40+ghz of P4 devil

2003-02-20, 13:47	#7
lycorn Sep 2002 Oeiras, Portugal 2700₈ Posts	Xyzzy wrote: The SSE2 optimizations for factoring don't kick in until 64 bits... Yeah, I´m aware of that. And it doesn´t surprise me at all that the XP is a lot faster than the P4 as long as we keep SSE2 out of the way. What I found amazing was the comparison between the P4 and the P3, specially at less than half of the clock speed...

2003-02-20, 14:36	#8
Xyzzy "Mike" Aug 2002 2⁵·257 Posts	The P3 has a pretty decent floating point unit, especially compared to the P4... It isn't as kick-ass as the XP's FPU, but it is decent... To get the P4 to scale so high in frequency, Intel had to make a lot of compromises!

2003-02-20, 14:40	#9
QuintLeo Oct 2002 Lost in the hills of Iowa 1C0₁₆ Posts	I ahve to wonder if this is over and above the 23.1 improvements. waiting impatiently 9-)

2003-02-20, 18:00	#10
roy1942 Aug 2002 47 Posts	Hey, the FTP site seems to be up now! Where's the new stuff? Our patience has been 'worn out' watching LL tests go "1.00%....1.01%..." and we have none left. We want our new software now!

2003-02-20, 18:24	#11
JC Aug 2002 Belgium 5² Posts	Version 23.2 has been posted. Read the whatsnew.txt.. :(