modded my x800 today

[kristos]

I finally went to aitec electronics shop near Leuven today and got the missing 20k VR.

I was so eager to finish the mods that I completely forgot to take pictures though :/

so here's one with the card installed. I didn't do the OVP mod and the white wires sticking out are for measuring the corresponding voltages


testing so far:
540 mhz core @1.5 Vcore = 30 mhz increase over stock :grum:
memory is a bit of a tricky thing:
best I got so far is 570 mhz @
2.10 Vdd and 2.25 Vddq
2.15 Vdd already gives worse results.
keeping vddq 0.05V higher then Vdd kills the oc
0.15 more V on Vddq give only a few extra mhz at best over 0.10 higher Vddq.

another thing that's odd is that I could reach 570 mhz on the mem stock on the axp
i only managed 540 with the p4 stock.

I also can't remember what bios is on the card or if it's the same as with the axp testing



overall, I'm very dissapointed seeing that many out there obtain these (or even higher) clocks at default volts...

[kristos]

I just rememberd I have a Vagp mod on my board but the Vagp now defaults to ~1.7V

afaik, ati cards don't like that



may that be the cause of the poor oc?


I'll remove the mod tomorrow probably, see if it makes a difference..

[Playful_Buffalo]

nice work, how long did it take?

[TEDY]

is it your gfx Sapphire VIVO? if so you can mod it to X800XT

[kristos]

nice work, how long did it take?

thanks

Honestly, I don't know how long it took me. I'd say 3 hours if I had to guess.
soldering to the components on the card takes like 5 minutes, but preparing the wires and laying out the traject for the wires + hotglue took a long time
Also, I lost a lot of time because I didn't do all the mods at once. Every time I started with a new part, I had to reheat the iron and/or the gluegun :banana4:

is it your gfx Sapphire VIVO? if so you can mod it to X800XT

It's an ASUS X800 PRO ViVo with 16 pipelines enabled but standard clocks for now.

It couldn't do the XT PE clocks before so I used rabit to edit the bios for PRO clockspeeds.

With the voltmods it's capable of the XT PE clockspeeds so it's time I flash that bios again



Funny thing is, I wanted a sapphire, but something had gone wrong with an RMA and the shop offered me to make a new purchase, they wouldn't refund me, but the only thing I wanted was an x800 card, and that shop only had the asus at that time.
Only later I heard that the sapphire x800 pro vivo's with blue pcb make some amazing clockspeeds at stock voltage :/

[mod_evil]

This is one beautiful job, man!

What the ohms you use in the vmods? The voltages?

[]'s

[kristos]

thanks


As the guides prescribe: 20k for Vdd, 20k for Vddq, 10k for Vgpu. I didn't do the OVP mod because I won't be needing it any time soon

[mclearn]

I have a Sapphire x800 pro vivo with blue PCB that doesn't clock up that high either. My vgpu measured stock at 1.41V, but I figured it was my garbage multimeter adding 0.01V. I upped it to 1.53 measured using the pencil trick and even now I can only get around 535 core. Mem is good, up to 590 so far.

[gline]

did the pencil trick on my x800 pro, 1.67V with watercooling, got it to 582mhz core, not bad, and i didnt get time to push it anymore, i got to bench it at 582, reckon it could go to 600mhz maybe

[flaxflax]

Just 582MHz on water? The Powercolor X800Pro ViVo that i'm owning are doing like 650MHz on TEC + water "Just" 1.7v. And i'm still wondering how far i can go with the voltage... Not 24/7 :P