Originally posted by: Sanius
ok..now it says 16x. I have 16 pipelines when i restart, can someone tell me some things first?
1) isn't the level of pipelines disabled because they are cheaper? which means my card has 16 pipelines, with 4 disabled?
2) whats the success rate with enabling pipelines? if i get artifacts, thats fine. i'll turn it back to default. but I don't want to risk a wrecked card, and I don't think they will let me return it for a new one if I do.
Don't forget about the vertex pipe. You'll want to try unlocking that too. It's just as easy as unlocking the other pipes that you've already done. On the screen where you added the checkmark to enable 16x1, further down you'll see the vertex shaders listed in a similar way. Again, another one will show as disabled. Add a checkmark to enable it, just like you did before.
To answer a few of these questions:
1) In a word, no. The reason nVidia provides specs for the 6800 as 12x1/5 is pretty simple. When creating GPU's (in this case the NV40) to make the high end (Ultra and GT) cores, they have to be a "perfect" match to the specification. In this case, the GPU has to work properly at 16x1/6 at the proper speed without artifacts. Now, since the manufacturing of these cores isn't 100% perfect, sometimes there are defects in the GPU's, making them unable to run properly at these specs. If the location of the defective pipe can be identified and disabled, the GPU will run stable (albeit slower due to a disabled pipes). So instead of losing $$$ on a non-perfect chip, nVidia can sell the disabled-pipeline chip for at least some $$. They don't lose money, consumer gets a cheaper product. Win-Win instead of lose-lose.
So, what happens next is the important part. So, now manufacturers have a product line (ie the 6800). Well, since these cards are cheaper, demand is greater for them. People are willing to sacrifice some performance to save some $$. Pretty soon, nVidia can't meet the demand for the GPU's for these cards, so they ship GPU's which don't have defective pipelines to keep up with production demands for these cards. However, the cards have to be sold at the 6800 specs, so working pipes are disabled so the cards will be 12x1/5. So there is a chance that the GPU is actually quite capable of doing 16x1/6. By using RivaTuner, you simply bypass the lock mechanism to see if your particular GPU can do 16x1/6.
2) Success rate is about 90% that at least either the vertex or shader pipe is without defect. It's just over 50% that both are working and can be unlocked without error (probably greater now that 15.3 is out). There is virtually no chance that enabling these pipes will cause damage to your card, and the unlocked pipes can easily be relocked if the pipes end up being actually defective.