XFX 4830 vmod?

[Ket]

I'm looking to vmod my 4830, its not doing bad atm, but I want more I'm thinking about 1.35v on the GPU and around 2.1v on the memory. If someone can help figure out a vmod many XFX owners would be grateful

[Mescalamba]

Muhaha, especially me, cause I'm going to buy it probably.. 4770 won't be that good in terms of OC.. Btw. how much you squeezed of it?

[Ket]

I got it to 730/2.05GHz, which ain't too shabby at all, but theres lots more to be squeezed from it.

[celemine1Gig]

Please give us the detailed name of the marked chip:

http://www.hs-augsburg.de/~ingmar_k/XFX 4830.jpg

Could be controlling VGPU. What does the rest of the card look like? I mean, VMem does need to be regulated somehow, too.

[Ket]

Heres a pic of the rest of the card;



The chip markings you asked for are; uP (I think, very difficult reading that bit) 62018(might be "B")Q VLP89K

[JamesBong420]

looks very similar to the 3850/3870 vmod.. could you get a better quality picture maybe? also what resistance does the pin in this pic have on your card?

http://img119.imageshack.us/img119/8...olfinalic3.jpg

[Mescalamba]

Btw. this doesn't have Volterra PWM right? (I guess not, it would be nice overkill for low end GPU

[celemine1Gig]

Could only find the datasheet for the up6209 online, but nothing for the up6201. :hmm:
Anyway, it is responsible for VGPU for sure.
I would guess that VMEM is the following:

http://www.hs-augsburg.de/~ingmar_k/STA60429.jpg

[Ket]

That IC is uP6101BU8 VG(I think)8B6. Last 3 are real tough to read. Default GPU voltage is 1.25v according to the vBIOS, and memory is Samsung -HJ1A, so a vmem mod to 2.1v should see them doing 1100 easy. Bit puzzled about the GPU clocking so low with 1.25v. BIOS modded voltage to 1.17v and the GPU clocked exactly the same.. so I'd guess the GPU is actually getting 1.17v and not 1.25v.

ED - If someone can verify where I think GPU and vmem read points are i'll get some exact numbers with my multimeter.

[celemine1Gig]

That IC is uP6101BU8 VG(I think)8B6. Last 3 are real tough to read. Default GPU voltage is 1.25v according to the vBIOS, and memory is Samsung -HJ1A, so a vmem mod to 2.1v should see them doing 1100 easy. Bit puzzled about the GPU clocking so low with 1.25v. BIOS modded voltage to 1.17v and the GPU clocked exactly the same.. so I'd guess the GPU is actually getting 1.17v and not 1.25v.

ED - If someone can verify where I think GPU and vmem read points are i'll get some exact numbers with my multimeter.

Here's a pic concerning the measure-points:

http://www.hs-augsburg.de/~ingmar_k/STA604292.jpg

For the vmods:

up6101:
Pin#3 is GND and pin#6 is FB. So measure resistance between both of them. (and make sure that this is really responsible for VMEM)

up6201:
pin#4 is GND and pin#13 is FB. Measure resistance.
Droop mod could possibly be done, but in the datasheet it says only for up6201A, so this might rule it out.

[Ket]

Ok, mesuring those points the numbers I got are 1.74v for what must be the memory - its undervolted. Samsung state -HJ1A for 1.9-2v operation. So we will aim for the full 2v to see what this memory can really do. Heat shouldn't be a issue, I got Tweakmonster RAMsinks on with Shinetsu. As for vGPU, its not at those points theres no reading at all from there.

ED - for anyone that wants it heres a full frontal of the card (for any persons under 18 years of age please leave the thread :p )

[celemine1Gig]

...As for vGPU, its not at those points theres no reading at all from there.
...

Then try the polymer caps' (the silver and blue ones on the frontside) legs , just right next to the points that I had marked. That should do the trick. But be very careful not to short them out! I know from experience that it is quite easy to slip when touching these THT parts' legs with the DMM probe.

[Ket]

Ok I'll do that when I'm next inside the case. Until then lets work on vmem. I'm good with a soldering iron and general electrical stuff but haven't vmodded a graphics card since the 9600Pro days. Whats going to be the best way to up vmem to around 2v? Ideally I don't want to use any adjustable pots for some reason I just don't like them. Something I can solder on to lower resistance is good enough.

[celemine1Gig]

We'll need the current resistance between the named pins first. Then I'll tell you what resistor to use to get approximately the right outcome of about 2V.

[Ket]

What pins were they? Unless I've missed something the only pins talked about were to do with vGPU

[celemine1Gig]

...

For the vmods:

up6101: <--VMEM
Pin#3 is GND and pin#6 is FB. So measure resistance between both of them. (and make sure that this is really responsible for VMEM)

up6201: <--VGPU
pin#4 is GND and pin#13 is FB. Measure resistance.
Droop mod could possibly be done, but in the datasheet it says only for up6201A, so this might rule it out.

See the little edit above.

[Ket]

Ahh ok, just to make sure pins 3 & 6 are the ones I'm looking at, want to mark them on the pic for me? I really don't want to kill this card before the vmem mod... its sexy

[celemine1Gig]

http://www.hs-augsburg.de/~ingmar_k/STA604292mem.jpg

BTW, the dot on the package marks pin#1.

[Ket]

Alright the multimeter says 0.79 resistance. THanks for marking the legs, I was actually looking at it wrong and was looking at the other 2 middle legs :p

[SpikeP]

Heya guys. i got one of these cards as well. haven't had time to sit down and get some real numbers from it. Also working tomorrow, but if anyone wants some pics taken, i got my lower end Olympus E-410 ready to go

Also got a multimeter at the ready if anyone wants some points read. If anyone does, give me a heads up on here, and i will see if i can get it all up from tomorrow. Look forward to hearing some results! May get involved myself. we shall see

- Paul

[celemine1Gig]

Alright the multimeter says 0.79 resistance. THanks for marking the legs, I was actually looking at it wrong and was looking at the other 2 middle legs :p

The calculation was based on wrong values. Had to delete it.

@SpikeP:
Double checking the resistances on your card wouldn't hurt, in order to be sure. So, feel free to measure the marked spots. I would highly appreciate it, as I always like to be sure of what I'm doing. And as I don't have the card myself, I'm fully reliant on your measurements here.

[celemine1Gig]

I measured @ 20 DCV as I tend to do everything in DCV, switching to 20 Ohms gave a reading of 7.4, or 740, whichever way you want to look at it.

Sorry, but that doesn't make any sense. Ignore my previous post then. I'll delete it, as the values clearly were not correct.

With the "20 DCV" setting you are measuring Volts, so I guess the 0.79 reading was Volts?

With the 20 Ohms setting you measure in the range from 0-20 Ohms. So, there is no "740" reading there.

Like this, working out a mod doesn't make any sense at all. Next time please include exactly how you measured. Which DMM setting and all.

[Ket]

What Ohms do you want me to measure at? Need a pic of my multimeter? I know what I'm saying, but others may not. Which is where visual aids are so handy

[Scrizz]

ooo I would like to know the result aswell

[Oc-Ghost]

Like I said, measuring @ 20 Ohms the reading is 7.4, or 740 depending if you needed the decimal. I do everything in DCV not Ohms so wasn't sure if you counted the decimal or not.

Let´s make this easy

20 Ohms setting on the DMM means, the range it can measure is up to 20 Ohm.
200 Ohms setting......... up to 200 Ohms.

Now then.. if you measured with 20 Ohm range and you got 7.4 it´s 7 POINT 4.... nothing else..
If and if it would have been 740, the meter would have shown some character or sign on the display.
Meaning its a bigger value than you have your range on.

Thank you and good luck