PCI-E true 16 Or Not?

K

Kreator

Limp Gawd
Joined
Nov 17, 2005
Messages
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I've had my 7800gtx in my first PCI-E 16 for a while however due to space and wanting to move it away from being directly overtop of my chipset fan i moved it down yesterday to the second slot.

Does anyone know if with my DFI Lanparty nF4 SLI-DR im going to have to change a bios setting to put it to a full 16 or is that board already true 16? I can't seem to locate that info anywhere.

In PCWizard06 it said something about the bus that my card was in having 16 but running at 2x(?)

My test scores for 3dMark2003 didnt seem to be hurting too badly, right after i made the adjustments i dropped a 15645

Thanks
 
if all the jumper blocks between the 2 pcie 16 slots are in the up position, either slot will have 16 lanes, but not both. with the jumper blocks in the lower position, both slots are 8 lanes each. i got 1 of my 7900gt's yesterday, and just for shits and giggles ran some benchies at the lower position (had just removed my 7800gt sli cards) 8 lanes, and then at the upper position, 16 lanes, and in 3dmark 05 and 06 there was absolutely no difference. since i witnessed this personally, this has proved to me that the 2x16 lane=better is just more marketing bullshit.
 
could be that these cards arnt utilizing all 16 lanes or something?

also with your rig what are you getting on 3dmark05?

i ran 05 tests as well i just did the 03 cuz it ran faster and it was late last night

and by what your saying if i just verify that all jumpers are in the top position theres absolutly no difference between the slots, only when you are looking to implement SLI and swap to the lower position to force 8x on both?
 
Kreator said:
could be that these cards arnt utilizing all 16 lanes or something?
Click to expand...
That is exactly it, but it is far from a marketing conspiracy, as some would have you belive.
It will be some time before the 16 lanes are totally saturated, but some have noticed an improvement in performance (of course not from 3DMark or any other synthetic benchmark).
 
remember the fairy tale of the princess and the pea? they placed a pea beneath a mattress and then piled about 20 more mattresses on top of that one. the princess couldnt sleep, because sh e noticed the pea under all 20 mattresses. well, she would probably be the only one to notice the performance diff between 8 lanes and 16 lanes, in any benchmark or app.
 
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