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-   -   FX 5800 Ultra pwns FX 5700 Ultra (http://www.nvnews.net/vbulletin/showthread.php?t=34622)

ricercar 08-13-04 01:00 AM

FX 5800 Ultra pwns FX 5700 Ultra
 
Ok, so I have been playing Doom3 on a 5700 Ultra for about a week. I'm getting 14-24 fps at medium quality 1024x768. Good enough. Tonight I swap in one of my 5800 Ultras, and fps skyrocket to 42-60 fps, with a spurious 72 fps reported occasionally! The game flies! :clap:

I did't expect to double my fps. What's up? Can someone explain it in simple language, please? Guess I didn't pay enough attention to the old threads claiming that the NV30 has more raw _____ (¿fillrate?) than the NV35/38, despite the 128 bit memory bus, and now I want to know ....


XFX 5700 Ultra
PNY 5800 Ultra

SN41G2 nForce2 chipset / Barton 3000+ / 2x512M PC2700 Corsair TWINX
Liteon 52x CDRW&DVD / 2xWD1200 JB / 480W FSP group PSU

Omega53 08-13-04 01:05 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
The wind coming off the fan actually launches your computer into the future thus allowing you to draw frames before they even happen. This explains your 72fps even tho it is capped at 60.

jAkUp 08-13-04 01:06 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
The 5800 Ultra is clocked at 500mhz/1ghz... Although it only has a 128bit bus, it's clockspeeds are so high that it comes off being a decent performer with no aa/af :) If you bump that up to high quality the card will probably struggle since doom3 will automatically force 8xaf and I don't think the 128 bit bus will be able to cope :)

Wylde 08-13-04 01:13 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
you can still buy 5800s these days? I thought they stopped producing them

msxyz 08-13-04 01:39 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
Quote:

Originally Posted by ricercar
I did't expect to double my fps. What's up? Can someone explain it in simple language, please? Guess I didn't pay enough attention to the old threads claiming that the NV30 has more raw _____ (¿fillrate?) than the NV35/38, despite the 128 bit memory bus, and now I want to know ....

The NV36 stands to the NV30/35 like the GeForce2MX stood to the Geforce2GTS

The original NV30 performs up to 8 Z/stencil operations simultaneously, where the NV36 only four. The 128bit bus is not a limiting factor during Z/stencil writes. But there is more: NVidia claims that the NV36 can render up to 4 pixels per clock cycle like the NV30/35 but only two of the pipelines appears to have loopback capabilities: in all the situations where multiple passes are needed (i.e trilinear filtering, multitextured surfaces) this card operates in a 2x2 configuration. This is also true for pixel shading ops, since only two of the pipelines appear to have shaders ALUs.

So, when you compare a fully fledged 4x2 card like the NV30 to a highly optimized 2x2 card you should see quite a difference in performance.

I suggest to try this fillratebenchmark on both card to see the difference: http://www.geocities.com/ndawinteractive/

Lfctony 08-13-04 03:10 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
Remember, the 5800U is a 4x2/8x0@500Mhz, while the 5700 is a 2x2/4x0@475Mhz. Thats more than double the fillrate. The plain 5800 is faster as well.

zakelwe 08-13-04 03:35 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
Yes it is all down to the 4x2 ( or 8x1 if you are feeling particularily generous today ) over the 4x1. Mind you the 5700U was a pretty good 4x1 implementation, far better than the 5600U IMO. Overclocked very well.

I'm still debating whether I should use 5800 or 9800 Pro for Doom3. The 9800 is faster normally but Doom3 seems to like nvidia cards, even the older ones.

Regards

Andy

ricercar 08-13-04 04:26 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
Quote:

Originally Posted by Wylde
you can still buy 5800s these days? I thought they stopped producing them

They are long discontinued. Mine was purchased March 2003. I did see new FX 5800 cards offered last month while searching Pricewatch vendors for 6800 cards, but I haven't seen a new Ultra for a year.

Thanks for the tech explanantions, ppl. I probably understand only about 2/3, but I think i get the main points all right.

mikechai 08-13-04 04:44 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
It will be interesting to see 5800U vs 6600GT. 500/1000 vs 500/1000 and same fillrate in multi-texturing.
We'll be able to see the gain due to new and more efficient architecture.

msxyz 08-13-04 04:48 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
Quote:

Originally Posted by zakelwe
Mind you the 5700U was a pretty good 4x1 implementation, far better than the 5600U IMO. Overclocked very well.

As I explained, most of the time it works as a plain 2x2. The vertex shading capabilities of this card are quite impressive, though, being on par with a NV35.

ragejg 08-13-04 05:45 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
Upcoming nvnews Gainward 6800NU review that I'm doing will feature 5800U as a compare card. Stay tuned. ;)

jnd3 08-13-04 08:46 AM

Re: FX 5800 Ultra pwns FX 5700 Ultra
 
Quote:

Originally Posted by mikechai
It will be interesting to see 5800U vs 6600GT. 500/1000 vs 500/1000 and same fillrate in multi-texturing.
We'll be able to see the gain due to new and more efficient architecture.

I agree, I'm looking forward to this one ... looking at the raw specs, they're almost contenders ... except for almost twice the vertices per second on the 6600.

GeForce FX5800 Ultra
Memory Bandwidth: 16.0GB/sec.*
Fill Rate: 4 billion texels/sec.
Vertices per Second: 200 million
*Effective bandwidth value considering the data compression techniques used in GeForce FX

GeForce 6600 GT
Memory Bandwidth: 16.0 GB/sec.
Fill Rate: 4.0 billion texels/sec.
Vertices per Second: 375 million


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