simple, overclocker loosens the timings. ATItool doesn't.
And Deathman, if i try to 'pump' 1.15v into my card, i get a crash. And this is watercooled, with plenty of fannage, in an ambient temp of 10-15c.
Printable View
simple, overclocker loosens the timings. ATItool doesn't.
And Deathman, if i try to 'pump' 1.15v into my card, i get a crash. And this is watercooled, with plenty of fannage, in an ambient temp of 10-15c.
You have to up the voltage on the memory. 2.0-2.15V is where I see some peoples cards hitting the 700 mark (mines just under 2.1V). Also crank up the MVVDQ to 2V at least, and move it higher if need be later. As don_vercetti said, Overclocker looses timings. I could hit 830Mhz on stock voltages, yet running at 700Mhz through ATITool yielded me nearly a 600point gain in 05 tests on the first set of drivers that was out for the card.
It sucks doesn't it? That you can't put more in and yet you know you have more then enough cooling.Quote:
Originally Posted by don_vercetti
Damn straight. In the current british weather and my 120.3, it keeps the card down to around 30c core. 30c!!!!!! And that's loaded as well.
And the core goes up to 610 on stock, going to 1.125 gets me to around 645, and i can't go higher! It is unbelievably frustrating.
Happily, my RAM can reach about 670mhz with 1.95v, and i haven't tried higher, so not all is lost.
Doing very well on the core and ram at least mine gets around that speed on core with 1.25V and memory takes about 2.0V to get that fast so you definatly got room on the ram at least.
yeah.
Any word on BIOS flashing helping out with more voltage? Or anyway of soldering on the missing mosfet, to help out the power regs a bit?
Sorry, double post. Connection went a bit screwy.
When you guys use Overclocker.exe, are you able to use the 2D clocks/3D clocks radio buttons? I see some people able to use them but they are disabled for me.
X1800Xl doesnt have 2d/3d clocks:(:stick:Quote:
Originally Posted by sickness
Viperjon did something with his card that really upped the possibilites of more voltage. Truely if someone had a dead XL or XT laying around and you could do some sodering im sure you could get an extra power regulator on the board if all the traces are there.Quote:
Originally Posted by don_vercetti
Oh besides bios flash I'd love to get one where I could actually enter my clock speed from default. That would be really nice.
Yup doesn't need it as much as the XT's did because its using so much less power.Quote:
Originally Posted by OV3RCLOCK3R
hmmm. It would be worth doing, imho. Think of this, the default voltage of the x1800xl is 1.075v, where the x1800xt is 1.3v. And the X1800XT has 6 regs, while the x1800xl has 5.Quote:
Originally Posted by deathman20
Now if we work out 5/6ths of 1.3v...we get 1.083...which is almost exactly the voltage of the x1800xl.
Therefore, i would imagine soldering a sixth one on would seriously help the voltage situation...right?
Time to find a dead x1800.....
The missing MOSFET and inductor pair on the X1800XL is for the Vdd supply iirc. The Vgpu uses a 3 phase regulator, which is the same as the XT cards. The MOSFETs on the cards are BGA types, so it might be quite difficult to add the missing MOSFET without the correct tools.Quote:
Originally Posted by don_vercetti
oh ok
there go my hopes, blasted into smoke.
WHere did you find that bit of info?Quote:
Originally Posted by persivore
I would like to know aswell:)Quote:
Originally Posted by deathman20
Didn't some of the first X1800XT's have 5 power mosfets aswell?
Ya I think some of the first XT's did just have 5. But well 6 is always better then 5 :)
I've just checked on my card again, and the missing MOSFET/inductor pair are for Vgpu. The XT's have a 4 phase Vgpu supply, and the XL's have a 3 phase supply. The other 2 MOSFET/inductor pairs are for the Vdd/Vddq supplies.
There might still be some hope that adding the missing phase might help increase the overclock, but i'm not confident that it will increase the GPU's voltage tolerance. I think that it is more down to the A14 core revision, and the problems ATI had producing the R520 cores.
The best way to work out if the extra Vgpu phase will help the voltage tolerance of the GPU would be to look at the XT cards with the missing 4th phase.
There is hope :) Wahoo :)
But of course its all limited on the A14 revision but its always worth a try.
I've noticed that that where the missing reg is, there are some other missing stuff aswell, on the back of the cardQuote:
Originally Posted by deathman20
So just to get it straight, if i were to find an old, dead, x1800, i could remove one mosfet and the two inductors on the other side, solder them on, and it would at least work?Quote:
Originally Posted by persivore
Since i wouldn't imagine the risk to be too high, i'd say it's certainly worth a try.
EDIT
looking at the back of the card, i can see Overclockers right. We're also missing some transistors from there as well.
So, anyone got a dead x1800 they'd donate to the cause? Or know where i can get these Pulse mosfets from? And the accompanying inductors, of course.
lol. I've made a mod already to one XL..and persivore is right...the missing inductprs belong to ram volts, and nothing else. you also need the 256mb bios, which i have been trying to get....
There might be some other components which would need to be added, such as resistors between the Vgpu regulator and the the MOSFETs gates and current sensing resistors. You might also need to remove parts from the card, to indicate to the Vgpu regulator that the 4th phase is present too. It would probably be easiest to compare a card with 4 phase Vgpu to a card with only 3 to work out which components are missing.Quote:
Originally Posted by don_vercetti
What mods have you done to your card? Are you sure that the missing components belong to the RAM supply? It looks like the missing components are for the Vgpu regulator after checking on my card :confused:Quote:
Originally Posted by cadaveca
hmm....gpu volts? maybe that's why i never saw a change.
i've added all the components besides the silicon/germanium whatever it is.
i can laugh at myself now...of course there was no change.
what is that, persivore? I only have an idea as to what it does, not what it really is. I have xl, xt and x19xt, xl has no power-jump, so i figured the xtra phase might have something to do with it. heh. soldered the stuff on i could, and there was no change....
lol
so i thought it was for ram power...
lol
Hi all,
I'm waiting for a Sapphire X1800XL to arrive... I have already bought an AquagrATIx 1800 (a waterblock made for x1800) to cool it with my water cooling system.
1) I've read about two versions of this VGA : A14 & A15... what's the difference between them? and how can i know which type is mine?
2) To rise up ur voltages u use the overclocker.exe or Ati tool? I ask it because i read that overclocker's voltages are not always the true voltages...
Waiting for ur reply ;)