Summer 2008 XS Cheapazchips 3D Challenge

[STEvil]

havent put it in yet :/

[G H Z]

Time to put a cat amongst the pigeons

I would have grabbed a GTS myself but I thought we were running GT's?

[STEvil]

his is a GT. on a GTS PCB.

[afireinside]

I would have grabbed a GTS myself but I thought we were running GT's?

Yeah how is that thing not a GTS? It's got a GTS PCB, GTS memory, and a "GT" core, except the GT core is just a downclocked GTS core. Same amount of shaders. Not trying to be a jerk but I've always been under the impression that a GT is just a downclocked GTS with slower ram? Just wondering what the ruling is on that one.

[dinos22]

i give up

[Johnny Bravo]

well if it makes you feel better I could use my back up card - but I don't think it's gonna help as it's nearly as fast!

[massman]

C'mon guys, if you buy a card, you need to look for the best out there. There has beeen many reviews in which people deal with GT cards on GTS pcb's. The card Johnny has is not the sole in it's category. Other manufacturers have released similar cards.

[SpikeP]

Im with massman on this one. I had the chance to get that card as well, but o opted against it. i believe the classification with a GTS is it must have a memory clock speed of 1100mhz???

anyways, i`ll get some results up soon, but these 775mhz core clocks you lot are getting on stock, im getting once i get to 1.6v, so there is no way this thing is going all the way. Thinking about sending it back, cause you have a large amount of electrical nosie even before you touch the clocks and voltage. memory isn't bad, but doubt such a weak core is going to get me anywhere.

- Paul

[Achill3uS]

im ready for the ln2 session
ive found only pencil mods publicated, its working also, so dont have to solder the card, but will see after some testing...

[dinos22]

i was just kidding of course

there is nothing wrong with 8600GT with GTS PCB and RAM

it is what it is

[G.Foyle]

Look at your core.
G84-400 = 8600GTS
G84-300 = 8600GT

[Johnny Bravo]

I think I passed the test?

Let's all get back to the fun of volt mods and sold stuff shall we?

[N00B]

which one is the best

qimoda or hynix?

[JamesBong420]

do you know what they are rated to?

[WesM63]

I'm in, if I can still enter.

EDIT: I hope so, I just picked up a Asus EN8600GTTOP/HTDP/256.

[STEvil]

which one is the best

qimoda or hynix?

Look at the mhz rating (1.4ns = 714mhz, 1ns = 1000mhz, etc). Gonna say hyinx though.

[dinos22]

question

i used grounding on the chokes where the RAM regulator is..........as i was getting accurate resistance readings

now one of those grounding points is actually reading 2.05v which is RAM voltage i think

should i change that grounding point or it doesn't matter as i'm gonna slap another wire on there to have RAM voltage readout

i've also measured two readins on the choke where the Core voltage regulation is and i am getting one reading saying 1.10v and other 1.25v[edit]NVM they are both reading the same >> that must be core voltage

which one should i go with..................

i'll keep playing i guess hehe




[edit] weird ... i am decreasing resistance and my vcore is dropping :S >> how do i fix that

ram is fine though
no problems there

[[XC] gomeler]

Lol odd, sure you are decreasing resistance? Maybe turn the screw the other way?

[dinos22]

Lol odd, sure you are decreasing resistance? Maybe turn the screw the other way?

lol i increase resistance all the way and you can hear that little clicking noise as you are screw the VR head meaning you've reached the end and as i am increasing resistance voltage increases and then stops at 1.28v (loaded) and will not increase any more as it's sitting on 50K

maybe i should slap a 100K resistor and increase resistance to get my mod happening

this card is defying electrical engineering laws

[dinos22]

my core VR grounding point is also vRAM readout point

would that make a difference?

[Johnny Bravo]

Dino that is all messed up

For the chokes (inductors) - neither is ground or at least should be, think of them as short lengths of wire, so if they went to ground they'd short. Always take your ground reference either from the correct capacitor leg or the ground plane.

For measuring voltages it's best to measure across the electrolytic capacitor that is closest to the component, that will give you an accurate measurement.

For vmods try and get the ground for the IC rather than from some far off reference. This will minimise the electrical noise it will pick up and also will provide better ground referencing, as some may be floating. In general try to keep vmods as close to the IC as possible as we are usually adjusting the feedback loop with means any noise picked up also gets amplified.

[dinos22]

hi mate

so how do i find proper ground then

i just used a 100K VR and now my vcore is 1.32v lol

[Johnny Bravo]

hang on I'll trawl through this thread and see if you've uploaded any pics

[Johnny Bravo]

Right!


The vmod ground pin is number 7 which should be the top right and pin on both of the ICs in that pic - obviously test that before going gun ho with the solder iron


See the purple caps in the top right of this photo (NOT the silver one) those are the vgpu - measure the voltage VGPU same story for the memory lower down

[dinos22]

i have no idea how you did that

i can see what you are saying about pin#7 and that's a good start for me

how do you "test" if something is ground

also how the heck did you find out that you can mod some of those larger points for vGPU and vMEM

that's the kind of thing i want to learn so that i don't look like a retard every time i need a mod