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Unbelieveable 50% speed boost in Mobility Radeon 9600/9700 - Page 3

post #41 of 112
7/21/04 at 3:34pm
Quote:
it's a well known fact that electronics run faster at lower temperature (to a point)
Is that really true? I know that electronics can be run faster at lower temps, but does cooling itself increase speed?

Or do you mean that it just decreases the incidence of faults?
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post #42 of 112
7/21/04 at 3:39pm
yeah, that's what I meant lol. can be run faster when cooled sry i said it wrong
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post #43 of 112
7/21/04 at 3:40pm
Thread Starter 
Quote:
Originally Posted by OGREtheBUFFOON
that's exactly what i was hoping for.

you shouldn't sompare the 8890 to his 5680 (i think). totally diff machines. i realize that downclock almost always decreases performance, this is one of those exceptions. his unit is probably full of dust and overheated and his gpu is too hot to perform at its best. it's a well known fact that electronics run faster at lower temperature (to a point), so i think this is what's happening, the cpu cools off enough and allows the previously handicapped gpu to perform like it should. any other theories are welcome because this is indeed friggin' weird

Why are we talking about me in the 3rd person the whole time?

This machine is a month old buddy, and I keep this it a mint condition. I blow out the fans once a week. There isn't a speck of dust on or in it.


As for the cpu running hot, I already said that the fans hardly come on. It ran at below 50c.


As for it running too slow before the downclock, go ahead and read some benchmarks on Mobility 9600P.


At stock core/mem of 350/250 all MR9600P's bench as follows:

Dawn Ultra (1024 2xAA) demo runs at 18 fps

Rthdrbl (default) runs at 28 fps

Ati Debevec (1024 0xAA) peaks at 42fps within 10 secs on ALL Mobility 9600P's. (and 42 is for a good laptop (Dell 8600-S5680)

Go do some research before you blame dust and heat.


Those values mentioned above on mine now have become:


Dawndemo runs at 24 fps

Rthdrbl runs at 40 fps

Ati Debevec peaks at 55 fps within 10 secs.

Please people go do what I did before you blame bad cpu's or dust or heat, I have ruled all those out.
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post #44 of 112
7/21/04 at 3:41pm
I have tried it and have now retired it. The decrease in speed (I went down to 2.71Ghz) as the 3.4 Ghz locked up at the 2.4Ghz setting on the 8790 and then caused the machine to "Hang" in the Bios POST after the Mouse was recognized. I figured out that for some reason the machine stayed "crippled" this way until I powered in down and al Depressed the three smaller blue lights to the left of the bigger power button. When I powered back up, I got a BSOD and then when I powered it up again everything was fine.

After setting the machine at 2.71Ghz, I did observe a complete system slowdown and the temperatures did not seem to be lower than they usually are.

I wonder if the "Actual" play of the games were quicker or if this is just a "statistics calculation" anomility?
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post #45 of 112
7/21/04 at 3:43pm
sry, gold. now that we now your machine was working fine, this performance spike is all the more interesting, could you give more benches and in-game fps with the cpu downclock?
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post #46 of 112
7/21/04 at 3:52pm
Thread Starter 
@G-Omaha, yes I had that a few times. Clock down too low and the screen whites out. A restart usually solves it. If not, then a shutdown, 5 secs rest and a bootup restores it. It's the same with overclocking.


But you haven't tested the GPU!

On mine I notice no speed difference in 2D in XP going from 3.2 to 2.4 ghz.
And I know where to look after 12 years of PC use.

If I went from 3.2 to 2.4 that's a reduction in 800mhz, you try that or even 700, that will work.

Check with GPU benchmarks, e.g. ATI tech demos that I mentioned.


@OGREtheBUFFOON:


It is really easy, just download the ATI Debevec Natural light demo from ATI, it's a small download.

Then D/L fraps to check FPS before and after. You will see what I saw.


I have few games, if you want, tell me where in the following to report my fps and at what setting and I'll do it for you.

Colin Mcrae 4 Demo
F1 Challenge '99 '02
Simbin GTR demo
Counterstrike 1.5
Rthdrbl
Ati Debevec
Ati Radeon 9800 Gargoyle
Ati Radeon 9800 Chimp
Ati Radeon x800 Subsurface scattering
Ati Lava caves
Dawn Ultra
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post #47 of 112
7/21/04 at 3:55pm
well, if you don't have any new games, don't bother. I just wanted to see some more evidence of this performance boost.
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post #48 of 112
7/21/04 at 3:57pm
Thread Starter 
No, mention any demo download, I have a 2.2 mbit line, I'll download it in 5 mins and do it.
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post #49 of 112
7/21/04 at 3:58pm
I tried to do some more benchmarking on my 8790 with the under-clocked CPU. On UT2003 asbestos demo my results are as follows:

bot-match
3.2 Ghz - 73fps
2.4 Ghz - 55fps

fly-by
3.2 Ghz - 128fps
2.4 Ghz - 128fps

So it seems that when doing any CPU intensive calculations (bot-match) down-clocking the CPU causes a drop in fps. Supprisingly, there was no difference in flyby. Maybe the increase in fps by underclocking the CPU is very much application specific.
The change in rthdribl was very impressive and very reproducible.
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post #50 of 112
7/21/04 at 4:03pm
What about the possibility that down clocking the system using the utility creates an anomoly in the values that are being used to calculate the fps. So you aren't really getting better performance, justed horked calculations. That would be my bet.
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post #51 of 112
7/21/04 at 4:09pm
Thread Starter 
Sonicwind:

No I can feel the difference. Not just by looking at a number.


Shapeshifter:

Exactly what I found!!! 3dMark03, UT2003 make no difference, those stay at the same speed. It is the newer DX9 stuff, Rthdribl, Highpass, Dawn, Debevec (HL2, Doom3) that see this huge boost.


This is Rthdribl on a desktop Radeon 9700 Pro, notice the settings and the fps;






This is Rthdribl on my P4 3.2 (@2.4 ghz) Mobility 9600 Pro 128 (350/250).
Notice the settings and the fps;

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post #52 of 112
7/21/04 at 4:32pm
Can you provide the before and after on the same machine with the same hardware. What you provided is two different machines with two different GPU's.

I guess I misunderstood it to have been a before and after comparison on the same machine.
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post #53 of 112
7/21/04 at 4:32pm
Very interesting. Can you test out the battery life using 2.4ghz? Is it much better?
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post #54 of 112
7/21/04 at 4:47pm
Thread Starter 
Quote:
Originally Posted by G-Omaha
Can you provide the before and after on the same machine with the same hardware. What you provided is two different machines with two different GPU's.

I guess I misunderstood it to have been a before and after comparison on the same machine.

Sure, this is before:




This is after:

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post #55 of 112
7/21/04 at 5:09pm
Thanks,

It's odd.
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post #56 of 112
7/21/04 at 5:11pm
Can I have your wallpaper?

Oh, yeah, very strange anomaly...
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post #57 of 112
7/21/04 at 5:15pm
Thread Starter 
Quote:
Originally Posted by deltawalkerl
Can I have your wallpaper?

Oh, yeah, very strange anomaly...

wallpaper:
http://hsi.dyndns.org/wallmain.html
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post #58 of 112
7/21/04 at 5:20pm
Her eyes are like jewels. Great picture.
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post #59 of 112
7/21/04 at 5:23pm
it's amazing what a little photoshopping can do for a person
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post #60 of 112
7/21/04 at 5:29pm
Thread Starter 
ehhm, can we like get back to the ...
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