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Radeon X800 Non-Pro/X800 XL/X850 Voltmods

Any electronic shop will sell them.

Does R1597 have a resistor or just two solder pads? Solder pads cant be pencil modded becuase they are not flat like the top of a smd resistor, so any line you draw will be broken..
 
I successfulyl did the vmod, y have the x800xl Sapphire with a 1.35V core stock, y applied the pencil and the gpu raised to 1.42, My real problems is that if i raise mhz in the core arctifacts apeears. What am i doing wrong (also i did the IGPu mod).


Thnks.
 
Hiya,
Just curious - has anyone seen degradation on their memory running high voltages under long term usage. Running my 2.0ns Samsung memory @ vdd 2.29v/ vddq 2.31v
 
mikeguava said:
Hiya,
Just curious - has anyone seen degradation on their memory running high voltages under long term usage. Running my 2.0ns Samsung memory @ vdd 2.29v/ vddq 2.31v
Click to expand...

Since you are running a x800Pro AGP you are running Vdd to hot in relation to Vddq. If you
have good ramsinks and active coolers 2.300 Vddq and 2.225 to 2.250 max Vdd will give the
best memory OC with with either 1.6 or 2.0ns Samsung DDR-2 chips on x800 AGP cards.
ATI didn't run the Vddq .09 volts hotter than Vdd on the AGP XT-PEversions of the card for
nothing lol!

At 2.30 you are well over nominal but still well under the absolute max voltages Samsung
specs for the chip. Just keep em COOL!!!

Viper
 
ViperJohn said:
Since you are running a x800Pro AGP you are running Vdd to hot in relation to Vddq. If you
have good ramsinks and active coolers 2.300 Vddq and 2.225 to 2.250 max Vdd will give the
best memory OC with with either 1.6 or 2.0ns Samsung DDR-2 chips on x800 AGP cards.
ATI didn't run the Vddq .09 volts hotter than Vdd on the AGP XT-PEversions of the card for
nothing lol!

At 2.30 you are well over nominal but still well under the absolute max voltages Samsung
specs for the chip. Just keep em COOL!!!

Viper
Click to expand...

PCI-E.... :rolleyes: only been messing around a lil bit had the vdd around .6V lower than the VDDQ intially but raising it helped the OCs . .going to mess around some more next weekend - seems like you hinting at the fact that PCI-E needs it the other way around ;) well the VDDQ actually only was slightly off - by .02V higher on the VDDQ in my case if I remember correctly.
 
Last edited:
mikeguava said:
PCI-E.... :rolleyes: only been messing around a lil bit had the vdd around .6V lower than the VDDQ intially but raising it helped the OCs . .going to mess around some more next weekend - seems like you hinting at the fact that PCI-E needs it the other way around ;) well the VDDQ actually only was slightly off - by .02V higher on the VDDQ in my case if I remember correctly.
Click to expand...

Awh okay. Damn you would think I would remember since I retraced part of the Vcore regulator lol.

No hinting about it. x800/x850 PCIe card memory OC best with Vddq running lower the Vdd (and just the way Samsubg specs it). Generally you want vddq about .050 lower than Vdd with a max of 2.250 Vddq. It is a very rare x800 PCIe card that get any increased memory OC with Vdd above 2.30 and that is with active cooling.

Viper
 
I just have a small question, I have a Sappire X800XL AGP, the limite stock is 430Mhz, I I increse the volt in bios to the AGP, will that do anything but raise the temp?
 
raising AGP voltage in your PC's bios will do nothing at all for video card OC, and yes it will increase temperatures a little.
 
Mussels said:
raising AGP voltage in your PC's bios will do nothing at all for video card OC, and yes it will increase temperatures a little.
Click to expand...

Well it won't help the card itself but it may help the AGP Controller in the chipset operate
better at high FSB speeds.

Viper
 
Last edited:
*I know that my new card is an PCIE*
However my OC on my 9800SE@XT (RIP) responded verywell to the increesed volt (from 407->452Mhz)
 
My X850XT is broken now.. after a few months with 1,57V. Max. stable clocks now : 490MHz 1,52V.

Not only one of my old nVidias with Vmods had any problem with it.... pure suckage.

Just a little warning, and u can better decide if u really want to Vmod ur card... ;)
 
GravediggA said:
My X850XT is broken now.. after a few months with 1,57V. Max. stable clocks now : 490MHz 1,52V.

Not only one of my old nVidias with Vmods had any problem with it.... pure suckage.

Just a little warning, and u can better decide if u really want to Vmod ur card... ;)
Click to expand...

You can't do Vmods with proper cooling.

Viper
 
I'm not an noob in the oc-game. :rolleyes:

Max. load temps with 30°C room was about 40°C....
 
Yes.

allesneu2.jpg
 
I think I found a mistake in the article's Vidmod section :
"So using 1.35V as an example to up the voltage using the VID setting we would use the VID table to determine a higher voltage with the same two SMR in place like the 1.55V setting to which we just connect the solder pads at VID1 with our conductive pen. Which would give a VID code of 01001."
Shouldn't this be VID2?
 
resonatorman said:
I think I found a mistake in the article's Vidmod section :
"So using 1.35V as an example to up the voltage using the VID setting we would use the VID table to determine a higher voltage with the same two SMR in place like the 1.55V setting to which we just connect the solder pads at VID1 with our conductive pen. Which would give a VID code of 01001."
Shouldn't this be VID2?
Click to expand...

Resonatorman .... I stand corrected, not sure how I missed that. But thanks :D
 
Unregistered said:
hi

does this mod works with a powercolor x850 xt AGP too?
Click to expand...


I dont see why not, just check to make sure it all looks the same as in the pictures.
 
Can i have some Voltages from ppl who modded her card?

Vddr + Vddq and if u did the Igpu mod too? Then the max. Vgpu and clocks u reached(before/after). Thx a lot! :)

I can't believe, that my card craps out around 645MHz....
 
GravediggA said:
Can i have some Voltages from ppl who modded her card?

Vddr + Vddq and if u did the Igpu mod too? Then the max. Vgpu and clocks u reached(before/after). Thx a lot! :)

I can't believe, that my card craps out around 645MHz....
Click to expand...

What card and what cooling???

Viper
 
Ok, no need for tips anymore. Squeezed out another 20-22MHz from the GPU, and reached my personal goals... 16k '03 and 8k '05. :toast:

Brand: Connect3D
Model: X850XT
Core OC: 670MHz
Mem OC: 648MHz
Core voltage: 1,73V
Mem voltage (both VDD and VDDQ): 2,33/2,4V
Core cooling: Water
Ram cooling: stock
temps. : 22C/31C idle/load
BIOS: stock / tweaked ram-timings

'05

8005 Points

'03

16106 Points
 
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