[Denny]eVGA 7900GTO testing

[guess2098]

i have not yet eVGA's video card for a long while
XFX yayayayaaaaa
anyways..... GTO... half price of GTX but user can easy flash to GTX's bios and run as it.....but remember, those are the recalled card from GTX becasue the ram is not wroking with GDDR3 1600 stable



box of eVGA 7900GTO







black sticker and i think it is ugly XD







rare view.... looks exactly like a 7900GTX but....there is one thing different








open it...!!!










GTX's core chip









1.1ns but bad GDDR3....







result will post later

[guess2098]

setup
Intel C2D X6800 @ 3.6G 400*9
Asus P5WDG2 WS PRO 改
GSKILL DDR2 800 CL3 2GBGA
eVGA 7900GTO
PC Power & Cooling 1000W
TQ120

side view






front view









stock default running, no tweak at all


3Dmark2001










3Dmark03









3Dmark05









3Dmark06

[HeavyH20]

One item to consider, the memory timings. Looks like they have tightened things up versus the GTX. The card runs faster with the original BIOS versus using a GTX BIOS. Just mod the stock BIOS if you want to tweak.

timing-----------GTX-------GTO-------BJ11 ------ BC14
tRAS------------24-----------22----------25-----------22
tRC-------------34-----------31----------35-----------31
tRFC------------43-----------39----------45-----------39
tRCDR----------12-----------10----------12-----------10
tRCDW---------8-------------6------------8------------6
tRP------------10-------------9-----------10-----------9
tRRD-----------8------------10------------8-----------8

So, looks like 1.1 ns Samsung GDDR3 may be on there, but, since it only has the 1.4 ns spec voltage(1.7 min, 1.8 spec, 1.9 max) versus the 1.1 ns voltage(1.9 min, 2.0 spec, 2.1 max), the timings have been adjusted accordingly to 1.4 ns just like the GT cards.

[guess2098]

One item to conder, the memory timings. Looks like they have tightened things up versus the GTX. The card runs faster with the original BIOS versus using a GTX BIOS. Just mod the stock BIOS if you want to tweak.

timing-----------GTX-------GTO-------BJ11 ------ BC14
tRAS------------24-----------22----------25-----------22
tRC-------------34-----------31----------35-----------31
tRFC------------43-----------39----------45-----------39
tRCDR----------12-----------10----------12-----------10
tRCDW---------8-------------6------------8------------6
tRP------------10-------------9-----------10-----------9
tRRD-----------8------------10------------8-----------8

So, looks like 1.1 ns Samsung GDDR3 may be on there, but, since it only has the 1.4 ns spec voltage(1.7 min, 1.8 spec, 1.9 max) versus the 1.1 ns voltage(1.9 min, 2.0 spec, 2.1 max), the timings have been adjusted accordingly to 1.4 ns just like the GT cards.

thx for the info. but i already tweak the bios.... actually tweaked test already done.... i am doing to stock test now lmao

edit... the ram volt at 1.9v that is right but even flash to GTX bios is still at 1.9v, i am trying to use nv offical bios ultilty to change it but not sure....

[HeavyH20]

The cards were physically reworked. So, there is no BIOS fix for the memory voltage.

[guess2098]

The cards were physically reworked. So, there is no BIOS fix for the memory voltage.

heheh that is what i think

[guess2098]

soft overclock + LOD 15

3Dmark2001






3Dmark03







3Dmark05







3Dmark06

[guess2098]

final run

remove bios delta 50 and change to 765, ram timing tweaked.....


3dmark01







3dmark03







3dmark05







3dmark06

[guess2098]

here is my tweaked bios, play with you own risk XD

http://www.iamxtreme.net/video/7900g...o.mod.bios.rom



NOT FOR 24/7, testing is ok!

[DEVIL K-ce]

Nice scores

But why only 3600MHz for 2k1 ?

[webwilli]

great scores

what have you tweaked in this bios?

[guess2098]

Nice scores

But why only 3600MHz for 2k1 ?

lazy.....
XD


@webwilli
removed delta, change ram timing

[webwilli]

ok. thanks. i will test it later on my two MSI GTO

[tommyshango]

I just got two of these and I have a couple of questions. What driver are you using? I dont want to use the one you say only for testing. But mine stops at 800 for the memory how are you getting 835? I used coolbits to adjust mine what did you use? I have the p5w-dh deluxe so I have to use modded drivers I am using the 85.96. Thanks.

[afireinside]

Why not for 24/7 denny? I planned on ripping the delta out anyway...

[tommyshango]

how are you possibly running these cards at those clocks? It falls to pieces when I get even close to that. Completely artifacted. If thats even a word. I doubt these clocks. or if its only for a score on a benchmark and not even possible to run at this speed normally then who cares. Cant be good for the card.

[guess2098]

@afireinside
not for 24/7 becasue memory timing and speed
later today johnny will have some mod out. i already saw it and that seems good
with that, my bios should work perfect


@tommyshango
becasue you need to remove the delta clock
driver doesn't make overclock different
bios does!
big sam dirver is for the SLi

[tommyshango]

well then how do you remove it ? im not following you.

[DEVIL K-ce]

well then how do you remove it ? im not following you.

Used Nibitor and set delta to 155 or higher

[guess2098]

Used Nibitor and set delta to 155 or higher

lmao

just put 0 is good

[principino1984]

subscribed... I wanna buy a 7900 gto too!!!

Marco

[RPGWiZaRD]

Damn is that 850MHz with 1.9v?, mem clocked well on stock bios in your case despite the 1.9v if that's correct. I wish mine also does similiarly but I don't have that much luck usually.

Tighter timings wasn't expected but does make some sense tho.

I won't flash my MSI 7900GTO to GTX bios personally if this is true that they just can't handle more voltage without possible failure as this card needs to stay with me for several months. But reading this thread it appears the voltage doesn't change and only the timings and that would cause the higher o/c results in some cases or is this 1.9v limit despite bios flash only limited to eVGA for example or does it also include MSI cards hmm..

I have to ask what you think about it, does this mean Nvidia were overvolting their own products and that caused problems for some well pretty many 7900GTX owners in fact, whetever it was stock or overclocked speeds, seems like these memory chips doesn't live healthy with more than 1.9v and hence they release these older GTX cards with prolly an older type of memory (I think they've fixed the prob with the newer 7900GTX) as a 7900GTO with another BIOS that reduces memclock speed from 1600 -> 1320MHz and memvoltage 2.1v -> 1.9v and also with tighter timings on the mem, which means faster speed at same clock than a GTX. Guess these cards would have been dumped otherwise and they decided to not do that and do a further investigate (well they probably knew the prob ) which lead to the 7900GTO. I'm suprised so many reaches above 800MHz (1600MHz effective) speeds on these cards tho despite the tighter timings and lower voltage, I hope I'm one of the lucky ones as well...

[Chad44]

I got my Gto Today

[RPGWiZaRD]

I got my Gto Today

Please post your memclock result later with stock bios if possible, I'm really interesting where the average memclock lands at for these cards with stock bios.

[tommyshango]

I got like 700 and 700 roughly but that was just a really rough estimate I have only played with them a few hours so far. Thats using the sli hacked driver cuz im on the p5wdh deluxe. I was artifacting at higher speeds and a few blue screens I will see what I can get.