eva2000

03-16-06, 11:03 AM

Hmmm XFX might not be clocked as high in real 3D mode http://forums.guru3d.com/showpost.php?p=1664365&postcount=1172 ?

i have been looking into the bioses of a few of the 7900 series cards and the 7900gts, all the gts i have seen run at 1.2 volt in the bios where as gtx runs at 1.4 so i am sure when the bios is modded to 1.4 on the gts with adequate cooling of course it should in theory be able to reach a similar level on the core as gtx, the weirdest thing i saw is on the delta clocks in the cards bios my msi 7900gtx has a 50mhz value on all 3 vid values whereas the 7900gt by xfx has 0 on all values on the delta clocks and the xfx 7900gtx xxx has 15mhz value on the delta clock of the core, whereas the msi 7900gtx has delta clock of 50mhz on the core, i wonder if this is done to give them a higher core clock value, i don't know, i'd be interested to know what difference the delta clock values make

for those unfamiliar with delta clock or geometric clock on 7800GTX series they had a 40mhz delta clock so for example BFG 7800GTX rated 460/1300 in 3d mode would be 500/1300 and drop back to 460/1300 in 2d mode.

With 7900GTX, MSI has 50mhz delta while XFX 7900GTX XXX has a 15mhz delta.

If MSI 7900GTX stock core is 650mhz then 3d = 700

If XFX 7900GTX XXX stock core is 675-690mhz then 3d = 690-705mhz

so in 3d mode it might end up the same clocks!!!!!

Interesting to see what other 7900GT/GTX brands have for a delta clock value!

What if eVGA 7900GTX SC locking issues is due to the delta clock ????? what value it have for delta ???

i have been looking into the bioses of a few of the 7900 series cards and the 7900gts, all the gts i have seen run at 1.2 volt in the bios where as gtx runs at 1.4 so i am sure when the bios is modded to 1.4 on the gts with adequate cooling of course it should in theory be able to reach a similar level on the core as gtx, the weirdest thing i saw is on the delta clocks in the cards bios my msi 7900gtx has a 50mhz value on all 3 vid values whereas the 7900gt by xfx has 0 on all values on the delta clocks and the xfx 7900gtx xxx has 15mhz value on the delta clock of the core, whereas the msi 7900gtx has delta clock of 50mhz on the core, i wonder if this is done to give them a higher core clock value, i don't know, i'd be interested to know what difference the delta clock values make

for those unfamiliar with delta clock or geometric clock on 7800GTX series they had a 40mhz delta clock so for example BFG 7800GTX rated 460/1300 in 3d mode would be 500/1300 and drop back to 460/1300 in 2d mode.

With 7900GTX, MSI has 50mhz delta while XFX 7900GTX XXX has a 15mhz delta.

If MSI 7900GTX stock core is 650mhz then 3d = 700

If XFX 7900GTX XXX stock core is 675-690mhz then 3d = 690-705mhz

so in 3d mode it might end up the same clocks!!!!!

Interesting to see what other 7900GT/GTX brands have for a delta clock value!

What if eVGA 7900GTX SC locking issues is due to the delta clock ????? what value it have for delta ???