8800GTS 512Mb (G92) vMods

[T_M]

team-eva doesnt exist??
We are very much a family at i4memory, not a one man band.

Dont bother with ram sinks for this card

[aussie-revhead]

No sinks at all ? Not extra chipset etc ?

I look forward to buying one of these .

[finalanrchy]

Does anyone know what the jumper looking thing at the back of the card near the power connector is for?

I am just to tempted to place a jumper on it .

[eva2000]

haha no team-eva it's Team AU = http://teamau.i4memory.com/ and http://teamau.i4memory.com/1

[aussie-revhead]

Nah mate I meant i4 in general not team-au

ie your group = i4 = team-eva



As soon as money comes through from my GTX sale I will be off to grab a 512 GTS . Then off to Jaycar to get some more VR's ...

[T_M]

No sinks, and there is no extra chipset either.

[VoRtAn_MaDgE]

Yes I am using a hard mod to reduce vmem.

1.4ns timings are tighter than the stock 1.0ns timings. I am going to tighten the timings further to a theoretical 1.5ns spec and see what the results are. Give me 10 min and I'll post a loose/tight timing 3Dmark06/05 score.

I won't hi-jack this thread, but tighter timings netted a very minimal increase in 3DMark05. 23244 v 23173. 3DMark05 would not complete at 1144 with the default timings, so yeah, tightened timings --> more mhz.

I've checked the qimonda 1.4ns datasheet but i can't find all the values that nibitor is showing me.

quimonda 1.4ns

__________________________________________________ _______________________________________



Gigabyte bios 8800gts g92 that nibitor is showing me...


I've got to change all the timming sets ???

Could you share the vmem mod for lowering the vmem value ?

[VETDRMS]

No, only change the value in timing set 1.

1.4ns
---------
tRC: 30
tRFC: 52
tRAS: 18
tRP: 12
tRCDRD: 11
tRCDWR: 6
tRRD: 6

[Mr. K6]

Hey all,

I must have read this thread 4 times and am very interested in vmodding my G92 8800GTS, but there's only one problem: I've never done a Vmod before ! I have a 15W iron and some thin rosin core solder. I also have some 22 gauge solid copper wire, but I think I might use some fan wire (seems like its thinner, 24 gauge+) instead. I did some practice work on an old PCI 56K modem just to get some PCB work under my belt, but I'm still a little wary of the exact procedure. I also ordered some 200, 500, and 1K ohm trimmers that look very similar to the ones T_M used in the first post. Anyway, can anyone throw some hints/tips for a newbie my way, or are there any good guides around? Thanks for all the information already and the great read

[VoRtAn_MaDgE]

No, only change the value in timing set 1.

1.4ns
---------
tRC: 30
tRFC: 52
tRAS: 18
tRP: 12
tRCDRD: 11
tRCDWR: 6
tRRD: 6

Changed timmingset 0 or 1 ?

[Stelios]

Changed timmingset 0 or 1 ?

If you click the "autoselect timingset" button , youl'll get a message with the timingset the bios uses.

[K404]

team-eva doesnt exist??
We are very much a family at i4memory, not a one man band.

Dont bother with ram sinks for this card

One of my RAMsinks feel off due to heat and the card artifacted and locked up instantly? I wouldnt try running without RAmsinks...no way.


___________________________

Max benching clocks on water: 880MHz core (1.375V (idle) 1100MHz RAM if I edged it up slowly. (default voltage)

[VoRtAn_MaDgE]

How about in one post pics of all the mods?
Vgpu, vmem, ocp, ovp ???
Lots of information in different thread... 8800gts, 8800gt, g80

Thks!

[gOtVoltage]

On my EVGA the Vgpu mod yields a max of 1.52v on AIR with stock modded heatsink....I will not do the memory the Qimonda dosnt run like my samsung did on the 320...The samsung would run 2300mhz 1.210 no prob! the Q onlydoes 2250max @50c ...It not worth the risk untill they decide to use better memory...Also @ 918//2268//2250 the bandwidth sucks....256bit bus shows little improvement when overclocked past 808//2000//2250...

Note:Ovp kicks in @1.53v on this card with Air

808//2000//2250 = 3Dmark06 13090 points @3.48ghzX2
918//2268//2250 = 3Dmark06 13200 points @3.48ghzX2

Overall the Max SM 2.0 =6150 Overclocked
Overall the Max SM 3.0 =6700 Overclocked

The GPU and Shader helped the SM 3.0 score by 1000points over stock score of 5600!

Having a high Oc on the memory is a must,, This is what helps the SM 2.0 score the most along with the Extra 10bw gained in the band width department ..

SM 2.0 Stock was 5300 and Overclocked gained 850 points..Since the The memory dosnt do anything more over 2250mhz im not messing with the Vmod for it...Ive ran the memory @2300mhz but it would fail half way through any test...Temps were 50c max load running anything!

In short the Vmod will get you 918mhz GPU and 2300mhz Shader easy..But with 1.5v-1.525 before the Prtection kicks in on Air!

If some one is using water id like to see results of this with out Chilled Water..

I may throw on a water block and go further ,but am still testing this thing on Air...

This thread has been Very help full,, Solder points are the easiest by far.
Keep up the good work

On a Quad this would easily get 2000-3000points more @3.7-4.0ghz So i guess im happy...No X2's come close to 16000 even @3.5-3.7ghz

[STEvil]

where is this thread where he has soldered the resistors in parallel with the caps? i came up with the idea of removing the caps altogether, but never tried it, and n1ck r1mer thought of soldering VR's across the caps, but hasnt done it either (though we were talking about it concerning the G80 GTS)

http://www.xtremesystems.org/forums/...d.php?t=171016

[T_M]

Ovp kicks in @1.53v on this card with Air

What did you use to test this?
If it was OVP, then if you turn up voltage while idle the system will crash at 1.52V.
If it was OCP, then if you turn up voltage while idle, then teh system will crash during a benchmark and will be far higher than 1.52V (more likely 1.6V).

Please can you test by running GT2 in 3DMark'06 (Firefly) and tell me at what idle voltage does your OCP kick in?

[gOtVoltage]

What did you use to test this?
If it was OVP, then if you turn up voltage while idle the system will crash at 1.52V.
If it was OCP, then if you turn up voltage while idle, then teh system will crash during a benchmark and will be far higher than 1.52V (more likely 1.6V).

Please can you test by running GT2 in 3DMark'06 (Firefly) and tell me at what idle voltage does your OCP kick in?

Im sorry ,,I think when it had crashed the first time i was ajusting during bench and went too much The Volts jumped past 1.6v when it had shut down...Its safe to say That OVP is 1.6v or higher! My card is freezing the screen @ 1.576v loaded..So it may be heat related..Which sucks because Riva reports a max of 51c when i bench this high! Idle is @37c when cranked to 920mhz! If you look in my Screen ,, my temp was about 42c max here then about a few minutes later i aborted from a freezing screen...

I cant complain for Air,,but i really think this thing has to be runing htter than wha tit says or this is my max core @920 and Air?

so this is what i just did...I loaded3Dmark06 started bench @907mhz

Idle 1.52v

load 1.576v

it benched!

So then

Idle 1.53v

Load 1.59v-1.60v

Froze screen...So i may be shutting down due to Core?

i remeber that i had a Full Pc reboot @1.525v during a bench last night...i was shure that was from the OVP...

Hope this helps..was done with memory @ stock clocks too!

[VoRtAn_MaDgE]

If you click the "autoselect timingset" button , youl'll get a message with the timingset the bios uses.

I'm on vista64 and the autodetect on vista64 doesn't works...already mencioned on mvktech forums...

The bios i used was this one - http://www.mvktech.net/component/opt...ed81d90c5a735/

I edited the timmingset 1 but if someone could test the autodetect to just make sure

Still looking for mod to lower vmem

Thks!

[aussie-revhead]

HAPPY NEW YEAR everyone !!!!

(well its 1.20am 1st January here)

Have you guys found a particular nv driver works best with these ? I found 169.09 worked best with my GTx but this version doesnt recognise my GTS . I also had a similar problem with the newest 169.28 drivers , what are you guys using ? I got my rig to 16,050 at 3.9ghz , but it should be capable of more . Is there much to be gained by altering timings with nibitor ?

What sort of core clocks can I expect with volt mod on water ?

Any help would be great.

[VoRtAn_MaDgE]

Well seems to me that the vmem on my 8800gts 512 should be different than the generic.
Why?

Look at the ic at the back of my card ...


Already googled but no luck

Any info would be great

Got to discover if my mem's are from qimonda too, to see if the mod should be lowering the vmem or not .
But i guess they should be qimonda...anyone with a 8800gts 512 from gigabyte to confirm this ?

found one guy with a 7100gs with that ic but no luck too i guess -http://forums.vr-zone.com/showthread.php?t=183215

[Stelios]

I'm on vista64 and the autodetect on vista64 doesn't works...already mencioned on mvktech forums...

The bios i used was this one - http://www.mvktech.net/component/opt...ed81d90c5a735/

I edited the timmingset 1 but if someone could test the autodetect to just make sure

Still looking for mod to lower vmem

Thks!

I have also the same gigabyte board and the timingset is No 1 .

[VoRtAn_MaDgE]

I have also the same gigabyte board and the timingset is No 1 .

Thks Stelios.

Do you have same ic on the back of the card in the place of the standard vmem ic from intersil ?

Is your card modded ?

[Stelios]

Thks Stelios.

Do you have same ic on the back of the card in the place of the standard vmem ic from intersil ?

Is your card modded ?

To be honest , i don't remember . I didn't bother to check it ... and now it's difficult to see it cause i have to remove the card .
I've done the vmem mods as showed in the 1st post of this thread and work great. We also have the same bios in the card . Your picture shows the same IC as in the first post in this thread .

What is the "standard vmem ic" ??? Do you mean the ISL6549CBZ ??? All G92 cards are supposed to have the same IC . Maybe it's relabelled .

[VoRtAn_MaDgE]

To be honest , i don't remember . I didn't bother to check it ... and now it's difficult to see it cause i have to remove the card .
I've done the vmem mods as showed in the 1st post of this thread and work great. We also have the same bios in the card . Your picture shows the same IC as in the first post in this thread .

What is the "standard vmem ic" ??? Do you mean the ISL6549CBZ ??? All G92 cards are supposed to have the same IC . Maybe it's relabelled .

Increasing vmem give you higher mhz on your gigabyte ?
Or you lower vmem? The shown in 1st post of this thread is the standard.

Maybe relabelled cuzz the reference is completely different as i shown 4 posts back.

Your card is just Vgpu/vmem modded ?
Which clock are you reaching? Cooling?

Thks again

[Stelios]

Increasing vmem give you higher mhz on your gigabyte ?
Or you lower vmem? The shown in 1st post of this thread is the standard.

Maybe relabelled cuzz the reference is completely different as i shown 4 posts back.

Your card is just Vgpu/vmem modded ?
Which clock are you reaching? Cooling?

Thks again

I have only tried to lower the vmem . Right now it's at 1.92v .I got the mod from jason4207 via PM , but i haven't asked him if i can publish it . The best way is to send him a PM for information . I don't either like this "secret" mod , but it's not my choice since it wasn't me who found it .

Right now i have the card watercooled with vgpu & reverse vmem mod . Vgpu is at 1.40V idle / 1.45v full load . I can bench at 950/1080Mhz everything . I haven't tried much , cause my proper benchmarks will be with both CPU & GPU in my singlestages( when i get some time though)
Yesterday i put some heatsinks at the voltage regulators (they were very very hot) ... no time to check for gains .