In light of this revelation at http://www.xtremesystems.org/forums/...ad.php?t=92853 that some manufacturers have different geometric delta clocks for their cards, i thought i'd download latest NiBiTor 2.7 and the current 7900GT/GTX bioses and see what clocks they have :D
7900GTX
eVGA 7900GTX Superclocked rev1
http://fileshosts.com/videocards/790...TX_SC_rev1.jpg
eVGA 7900GTX Superclocked rev2
http://fileshosts.com/videocards/790...TX_SC_rev2.jpg
Gigabyte 7900GTX
http://fileshosts.com/videocards/790...te_7900gtx.jpg
MSI 7900GTX
http://fileshosts.com/videocards/790...si_7900gtx.jpg
PNY 7900GTX
http://fileshosts.com/videocards/790...ny_7900gtx.jpg
PNY 7900GTX OC
http://fileshosts.com/videocards/790...7900gtx_oc.jpg
XFX 7900GTX
http://fileshosts.com/videocards/790...fx_7900gtx.jpg
XFX 7900GTX E
http://fileshosts.com/videocards/790..._7900gtx_E.jpg
XFX 7900GTX XE
http://fileshosts.com/videocards/790...7900gtx_XE.jpg
======================
7900GT
POV 7900GT
http://fileshosts.com/videocards/790...7900gt_pov.jpg
Galaxy 7900GT
http://fileshosts.com/videocards/790...0gt_galaxy.jpg
XFX 7900GT
http://fileshosts.com/videocards/790...7900gt_XFX.jpg
XFX 7900GT EE
http://fileshosts.com/videocards/790...0gt_XFX_EE.jpg
XFX 7900GT XE
http://fileshosts.com/videocards/790...0gt_XFX_XE.jpg
XFX 7900GT XXX
http://fileshosts.com/videocards/790...gt_XFX_XXX.jpg
eVGA 7900GT
http://fileshosts.com/videocards/790...900gt_evga.jpg
eVGA 7900GT SC rev1
http://fileshosts.com/videocards/790...ga_sc_rev1.jpg
eVGA 7900GT SC rev2
http://fileshosts.com/videocards/790...ga_sc_rev2.jpg
Leadtek 7900GT
http://fileshosts.com/videocards/790...gt_leadtek.jpg
seems nearly everyone adhered to 50mhz and 20mhz delta for 7900GTX and 7900GT respectively except XFX