few min ago i was testing my card and find out something weird
the voltage i set was original 1.55v (vmoded) in 975
but when i measure it today in 680i it is like 1.65v ....
and even i remove the mod, the voltage reads 1.48v idle and 1.5v loaded....
i haven't test back in 975...
680i mobo is asus rog...
That's odd. 8800 don't have 2D and 3D profiles with a different vcore right? If it does have them that would be the only logical explanation.
Waiting for the re-test in the 975x board.
Blue Dolphin Reviews & Guides
Blue Reviews:
Gigabyte G-Power PRO CPU cooler
Vantec Nexstar 3.5" external HDD enclosure
Gigabyte Poseidon 310 case
Blue Guides:
Fixing a GFX BIOS checksum yourself
98% of the internet population has a Myspace. If you're part of the 2% that isn't an emo bastard, copy and paste this into your sig.
I`m getting different voltage readings on my GTS compared to everyone else.
I get 1.34V without voltmods, checked with 2 DMMs, way higher than anyone else.
Board is an Asus P5B DH
Originally Posted by T_M
______
Sometimes, it's not your time. Sometimes, you have to make it your time. Sometimes, it can ONLY be your time.
How does it overclock? Maybe Nvidia bins the dies to different vcores/revisions like AMD and Intel do?
Blue Dolphin Reviews & Guides
Blue Reviews:
Gigabyte G-Power PRO CPU cooler
Vantec Nexstar 3.5" external HDD enclosure
Gigabyte Poseidon 310 case
Blue Guides:
Fixing a GFX BIOS checksum yourself
98% of the internet population has a Myspace. If you're part of the 2% that isn't an emo bastard, copy and paste this into your sig.
625/975, but I dont like my temps...sorry, not pushing it until I can sort out my cooling
I know it`ll bench higher
______
Sometimes, it's not your time. Sometimes, you have to make it your time. Sometimes, it can ONLY be your time.
ok it is for sure
i am running in on 975 now and core voltage is 1.55v and memory voltage 2.25v
in 680i core voltage is 1.64v and memory voltage 2.35v....
Hmmm thank's for info
This is good for 680i user, but generally strange.
btw : I moded my 8800GTX ( Asus ) gpu@200 Ohm andVgpu 1.5V with mod default - clocks 660MHz ( ac cooling temp stress 60C ) and what ? No more MHz, more vgpu do nothing. I tried 1.7V and complete nothing more
Water on gpu and 660MHz
Bad Asus card
Regards
Martin
Life sometimes gets in the way of what we want to do.
Do you use the same ground for both measurements?
Different rails can have different ground levels, could be one explaination.
The vgpu ground plane can also float a little.
Try to measure the voltages in reference to the PCI-E ground on each card, and also compare them to the motherboard ground (screw holes and such).
Another thing I have noticed is that some voltage regulators use the 3.3V rail as a referens voltage. (A P5W64 overvolts the vcore higher with higher +3.3V for example) There might be a droop on the 3.3V voltage to the PCI-E ports on one of the boards.
"In mild doses, ethylene produces states of euphoria, associated with stimulus
to the pleasure centres of the human brain."
Intel benching: 3DMark Vantage: E69642, P37253, H30363, X22138
Swedish Overclocking Champion 2006 - Celeron Mobile 1400 @ 4243MHz - 203%
Maybe nvidia did that on purpose to secretly make the 680i overclock cards better?
where do you have slot power @ ?
it is the same card and i didn't change / remove / remod the card tho...
and tested with two cards
@Dynasty
slot power? on 975 is auto and for 680i i don't know there is slot power adjust
i use vcore measure point on the back of 8800GTX
Last edited by guess2098; 12-09-2006 at 09:35 PM.
I was thinking the same thing..
i did call a nv card sellerXD
he told me it is for sure 680i will increase the voltage of vcore and even with tighter mem timing...... well i think most of us has both 680i and 975 /965 mobo. plug your 8800GTX or GTS on it and measure it.
also, stock 8800GTX on 975 is 1.3v and in 680i is 1.5v....
and memory voltgae is higher in 680i too
do you get higher max 8800GTX clock on 680i due to the higher volts ??
---
yes
since i thought my card had problem lol, so i removed one card's vmod, and i reach 700 with "stock" air with artifact.... (1.5v)
i reached 710 with vmod on 975 with 1.55v (200ohm vmod started at 1.55v)
wow... do you know if same happens with 8800GTSs ??
---
i don't have GTS anymore..... so................................
i am waiting to see your GTS hehehehe
DO IT man
1.5VCore is obviously safe on stock cooler then! Tho temps in an overclocked state might be quite high...
______
Sometimes, it's not your time. Sometimes, you have to make it your time. Sometimes, it can ONLY be your time.
I dont understand how can different board affects VCore on G80...
Maybe we will Vmod the graphic cards trough the system BIOS in the future
I noticed one thing, strange, unexplainable
8800GTX on P5B Delux mobo, 8800GTX with Shamino's vgpu & vmem mod
2D voltage = 1.75v
3D voltage = 1.65v
I am 100% sure that i measure this right, also with 8800GTS same thing
the same voltages also on P5W64
OC-Lab.si!!
Maybe the 8800 cards do have different VIDs, and we don't know it? Could be that the mod is targeting the wrong VID, don't know why the mod effects both VIDs though. Ohh wel, I have no knowledge of the power circuity at all, so I have no idea really.
Different VIDs is the only explanation why the cards have a higher vcore on 680i boards. Mmm, there might be a way to let the video driver think the motherboard has a 680i chipset while it actually has an Intel one. For the higher vcore of course.......
Blue Dolphin Reviews & Guides
Blue Reviews:
Gigabyte G-Power PRO CPU cooler
Vantec Nexstar 3.5" external HDD enclosure
Gigabyte Poseidon 310 case
Blue Guides:
Fixing a GFX BIOS checksum yourself
98% of the internet population has a Myspace. If you're part of the 2% that isn't an emo bastard, copy and paste this into your sig.
Didn't nVidia advertise something about overclocking all parts ~5-10% if you used an entirely NV platform? I remember hearing something like this a while ago. If that's the case then pushing slightly more voltage into the card in a 680i mobo makes sense.
I think you may have hit the nail on the head with that one.
In short, both AMD and NVIDIA discovered that their next-generation graphics cards are superior to each others' last-generation graphics cards.
Have you tried measuring v's with Linkboost enabled and then disabled, could Linkboost be causing this overvolting
Linkboost and vgpu go up ? Hmmm not. For me linkboost = raise PCI-E freq.Have you tried measuring v's with Linkboost enabled and then disabled, could Linkboost be causing this overvolting
Life sometimes gets in the way of what we want to do.
Posting Permissions
Reply With Quote
Bookmarks