X-bit labs

Started by: shafty | Date 07/15/04

Comments: 15 | Last Comment:  08/24/06

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1. You need a vivo card to enable the 16 pipes. the ones that have a yellow connector near the power input.

I disagree, The X800 XT is not really supposed to be directly compared to the Geforce 6800 GT.

Considering Geforce 6800 GT is MSRP 399US, and Radeon X800 Pro is MSRP 399US

How would X800 XT be 399US as well

A more fair comparison would be:

Geforce 6800 GT vs Radeon X800 Pro
Geforce 6800 Ultra vs Radeon X800 XT
Geforce 6800 Ultra Extreme vs Radeon X800 XT PE

Considering that the Radeon X800 Pro has similar fillrate in comparison to Geforce 6800 GT. To me it's total fillrate that matters not necessarily the number of quads, but the number of quads enabled does play a major factor in determining fillrate.

6800 GT = 16x350 = 5600
X800 Pro = 12x475 = 5700

6800 Ultra = 16x400 = 6400
X800 XT = 16x500 = 8000

6800 Ultra Extreme = 16x450 = 7200
X800 XT PE = 16x525 = 8400

X800 XT seems to be for now a PCI Express part only no indication of it arriving at AGP8x, also the X800 Pro MSRP is 399US, so X800 XT would be introduced at a higher price point most likely estimates place it at a MSRP 449US.

From what we have seen on the NV40 architecture it seems that at equal amounts of fillrate the R420 Series will lose for the most part against NV40.

It's because of ATi's higher filrate advanatge an extra 31.25 % on fillrate comparing X800 XT PE vs Geforce 6800 Ultra 400 vs 525 that it leads in the most demanding situations.Not to mention for the fact of ATI Adaptive "Trylinear" Optimization algortihms, which make it take a near negligible hit with AF from 2x - 16x AF.

2. I was just wondering, did you continue to test the speed of the 6800GT as you stepped it up to 450mhz core? Reason I am asking is because from what I've heard even with watercooling scores actually start to go down after 435-440mhz due to clock throttling from lack of power since the GT has only one molex unlike the Ultra.

Timophey has tested a GeForce 6800 GT board clocked above 450MHz. There was no throttling, but the graphics card hung up.

By the way, we have also tested on 420MHz too, the results were lower compared to 450MHz.

3. And I wonder why Tim hasn't looked at the possibility of increasing the core voltage on the GT, seems a bit unfair compared to the means used with the X800PRO, cos without the aid of the extra voltage the frecuency growup would've been much lower.

Well, you should expect our future issues with more extreme overclocking experience.

4. Why have they stopped using the "HIghly anticipated DX) games"?

We have not stopped to use the upcoming titles to test graphics performance today. You will see the updated results in our future articles.

5. Nice review. Esp HW PS details.

6800GT is an excellent package for Nvidia this time 'round. Of course it should've been tested against its "16-pipe" analog, X800-XT ($399), which is to be released soon. This is now selling as an X800-Pro VIVO & easily modifiable - as mentioned by 1. Not to be confused with X800-XT PE.

The reason the clever Xbit people didn't mod the 6800GT is that by increasing VCore or VDM, the card's trigger level is reached earlier than at default V, so OC performance is actually lower...;) This restriction is PS related as the GT only has a single molex...

The results were also interesting esp given the comments re:ATI's "nasty" filtering options(less?), given FW 61.34 AF/tex filtering "quirks". I also wonder why a 6800GT performs well with only 8 color ROPs having blend ability vs 12/16 for the X800-Pro/XT...? Bandwidth limited so it doesn't matter? I guess that's why "16 pipe" ATI boards are faster.

P.S. Cat 4.7 also have numerous bizarre bugs due to compiler, but given you didn't really test PS2, I guess it doesn't matter...

4. You are too cynical...:)

6. I don't think you can change anything external to make it to 16 pipelines.
As ATI and nVidia use internal fuses like Laser fuse or eletrical fuse to determine the no. of pipelines during wafer sort at test house.
These fuses are blown either by a laser or electrically in the chip.

7. There's no need to use a VIVO X800 pro for modding , a normal X800 pro can be modded,
look at this link - its say all

http://www.pcunleash.com/bbs/zboard.php?id=MyItemReview&page=1&sn1=&divpage=1&sn=off&ss=on&sc=on&select_arrange=headnum&desc=asc&no=26Le%20lien%20a%20été%20mis%20dans%20votre%20presse%20papier,%20vous%20n

8. Type in "X800 Pro UNLOCK" @ Google and find methods to unlock all 16 pipelines and overclock your card to an X800 XT PE.

9. how to overclock x800 pro

10. Hello i really like your site!

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