P4 3.0C vs Xp3000+

[pchan]

Hi All,

I have 2 PC with the following config.
1st PC
1. Soltek (nForce2)
2. RAM DDR266 512MB
3. AMD XP3000+
4. Hard disk - IBM Deskstar 80gig

2nd PC
1. MSI 865GM2
2. RMA DDR400 1GB
3. Intel P4 3.0C
4. Hard disk - WD 80gig

I did a simple test by encoding the same AVI (MJPEC) video clip on both system Premiere 6.5 frameserve to TMPGEnc.

1st PC: Encoding time 40 minutes, CPU utilization = 100%
2nd PC: Encoding time 60 minutes, CPU utilization = 60% (Hyperthreading ON).

I have turn on DMA on all hard disk in both system.

Can some please let me know what I have not setup correctly in my 2nd PC.

[thecoalman]

I was getting similar slower results with the same processor, even a slower P4 using the same chipset but on a different mobo had faster speeds than me. See the benchmarking thread stickied.

Not positive by suspect it's the mobo in my case.

[pchan]

Thanks thecoalman.

I used this P4 on my PVR. Several days ago, I spent hours swapping my xp2500+ to my PVR and P4 to my 2nd PC. I thought HT and higher clock speed will help cut down the encoding time. Guess this is really not the case.

[bazooka]

Thanks thecoalman.

I used this P4 on my PVR. Several days ago, I spent hours swapping my xp2500+ to my PVR and P4 to my 2nd PC. I thought HT and higher clock speed will help cut down the encoding time. Guess this is really not the case.

The P4 has longer pipes that the data has to go through.

[thecoalman]

I thought HT and higher clock speed will help cut down the encoding time. Guess this is really not the case.

If you read the thread you'll see disabling HT improves performance slightly.

[pchan]

I have discovered my P4 problem. It's WD 80gig hd that is slowing down the PC. I swap it with my spare Hitachi Deskstar 120gig. The P4 CPU utilization has gone up to 85% and the encodine speed is about 2X of Xp3000+. Just got back the WD 80gig from RMA. Guess.. it will go back to RMA again.

[Cobra]

The P4 has more pipes that the data has to go through.

Allright bazooka,

I always thought that the P4 didn't have more pipelines as such, but much longer ones allowing for efficient processing of non-variable tasks. As I understand it, AMD CPUs have short execution pipelines so if the prefetch thingy doesn't predict what it needs next then a pipeline flush and reset is less expensive time-wise than a P4 pipeline flush which is a lot longer. That's why P4s excel at video encoding - it isn't hard to predict so it can hammer through it quicker, and AMDs are better at gaming because the P4 loses time making mistakes and paying for it.

It's like a P4 is a drag racing car, and an Athlon is an F1 car. If it's a straight road then the P4 leaves the Athlon for dead, but if there's complexities like turns the Athlon can handle it but the P4 keeps bumping into the sides.

Hmmm, I've rambled. Sorry! I know this explanation is correct, but I never knew the P4 had more pipelines. How many does it have?

Thanks!

Cobra

[Capmaster]

Cobra, That's the way I understand it too. I read some interesting White Papers at the Intel site explaining the pipeline architecture. Very interesting stuff

[bazooka]

The P4 has longer pipes that the data has to go through.

Allright bazooka,

I always thought that the P4 didn't have more pipelines as such, but much longer ones allowing for efficient processing of non-variable tasks. As I understand it, AMD CPUs have short execution pipelines so if the prefetch thingy doesn't predict what it needs next then a pipeline flush and reset is less expensive time-wise than a P4 pipeline flush which is a lot longer. That's why P4s excel at video encoding - it isn't hard to predict so it can hammer through it quicker, and AMDs are better at gaming because the P4 loses time making mistakes and paying for it.

It's like a P4 is a drag racing car, and an Athlon is an F1 car. If it's a straight road then the P4 leaves the Athlon for dead, but if there's complexities like turns the Athlon can handle it but the P4 keeps bumping into the sides.

Hmmm, I've rambled. Sorry! I know this explanation is correct, but I never knew the P4 had more pipelines. How many does it have?

Thanks!

Cobra

Sorry...I make mistakes too.

It should be longer pipelines.

[Cobra]

<notes date and time>

Ahh, I got something right for once!

[rallynavvie]

Fire?