Seen this? : New way to softmod VGPU

Greebo · 27 Jan 2009 at 22:40

Nice. Now 850 stable at 1.3v under water at 37C 24/7. Will try and see where 1.4v gets me tomorrow.

I have been waiting for a soft volt mod for my 4870 for months now.

One small mistake with your batch file. You have used the decimal value instead of the hex value for the default voltage so it will be putting about 3 volts through the card :eek:

. It should read 41 and not 65.

Small point but may affect some users

fornowagain · 27 Jan 2009 at 23:05

Greebo said:
One small mistake with your batch file. You have used the decimal value instead of the hex value for the default voltage so it will be putting about 3 volts through the card . It should read 41 and not 65.

Nah 1.7v ish, lol. Well spotted. Good case in point, never copy values. Always do you own calcs.

Glad it worked though, must be a reference card then?

tmaxxthomson · 27 Jan 2009 at 23:19

thanks for that batch! changed all the bits i needed to and it works brilliantly with my 4870x2 =] im wonderig, what would u recomend i set the memory to? because im not sure what to overclock the memory to on this card. and what what overclock do u think is possible with 1.3v? my card is watercooled btw. thanks =]

FrenchTart · 27 Jan 2009 at 23:46

Just tried this and it seems to work well (thanks for the batch - though I took your advice and checked the figures)

Any idea of an acceptable temp for the VRMs? They seem high to me but perhaps they're meant to be...

gurusan · 28 Jan 2009 at 00:04

just tried this on the 280 and at 1.2125V got 783/1566/1296 which is a fair whack above 729/1512 core/shader I had before.

Will mess about a bit tomorrow and do some 3dmark06 runs.

fornowagain · 28 Jan 2009 at 00:17

tmaxxthomson said:
thanks for that batch! changed all the bits i needed to and it works brilliantly with my 4870x2 =] im wonderig, what would u recomend i set the memory to? because im not sure what to overclock the memory to on this card. and what what overclock do u think is possible with 1.3v? my card is watercooled btw. thanks =]

1.3v isn't much of a bump, 1.4v is fine under water for an X2. The bandwidth at 1000MHz (4000MHZ effective) is massive and more than enough. I don't see a lot of gains going higher tbh.

Aekeron said:
Just tried this and it seems to work well (thanks for the batch - though I took your advice and checked the figures)

Any idea of an acceptable temp for the VRMs? They seem high to me but perhaps they're meant to be...

What's high to you? VRMs do get seriously hot. On mine, even under water they're quite a bit hotter than the cores.

gurusan · 28 Jan 2009 at 00:23

I liked keeping my VRMs on my 4870 under 90C...the lower the better.

FrenchTart · 28 Jan 2009 at 00:24

Well, at 1.3 and my fan locked to 35%, the VRMs went over 80 before I closed furmark.

I realise that they can probably go a lot higher than that but I guess I just wanted to get an idea the sort of temps I should expect on them

PaulyD · 28 Jan 2009 at 00:26

120 odd on stock cooler 4870...

Ignore....

fornowagain · 28 Jan 2009 at 00:29

Aekeron said:
Well, at 1.3 and my fan locked to 35%, the VRMs went over 80 before I closed furmark.

I realise that they can probably go a lot higher than that but I guess I just wanted to get an idea the sort of temps I should expect on them

Volterra PWMs are rated for 125C, under a 100C is fine. If you're worried try and get some air over them, spot fan can work wonders.

---------------------------

Extreme voltage version for X2 in the OP. Remember to check the values and paths.

FrenchTart · 28 Jan 2009 at 08:46

Thanks for the info - I'd imagined that they could reach 100 without too much fuss but I didn't want to make any assumptions

Perhaps you should put a warning on the 1.65v .bat - I can imagine some people using it without realising just how much voltage that is for the card...

[timko] · 28 Jan 2009 at 10:58

Fornowagain

Add this to the top of the batch file...

Code:

Set RIVAPATH = "C:\Program Files (x86)\RivaTuner v2.22\RivaTuner.exe"

..and then change all occurences of..

Code:

CALL "C:\Program Files (x86)\RivaTuner v2.22\RivaTuner.exe"

..to this instead...

Code:

CALL %RIVAPATH%

...to end up with this...

Code:

ECHO off
REM Fornowagain's Extreme Volts for X2 users batch file.

SET RIVAPATH = "C:\Program Files (x86)\RivaTuner v2.22\RivaTuner.exe"
cls
ECHO Graphics Vgpu selection menu.
ECHO ===================
ECHO Press 1 for Default
ECHO Press 2 for 1.30v
ECHO Press 3 for 1.35v
ECHO Press 4 for 1.40v
ECHO Press 5 for 1.45v
ECHO Press 6 for 1.50v
ECHO Press 7 for 1.55v
ECHO Press 8 for 1.60v
ECHO Press 9 for 1.65v
ECHO ===================
CHOICE /C:123456789 /T 10 /D 1 /M "Which voltage?"
IF ERRORLEVEL == 9 GOTO 1.65v
IF ERRORLEVEL == 8 GOTO 1.60v
IF ERRORLEVEL == 7 GOTO 1.55v
IF ERRORLEVEL == 6 GOTO 1.50v
IF ERRORLEVEL == 5 GOTO 1.45v
IF ERRORLEVEL == 4 GOTO 1.40v
IF ERRORLEVEL == 3 GOTO 1.35v
IF ERRORLEVEL == 2 GOTO 1.30v
IF ERRORLEVEL == 1 GOTO Default
:Default
ECHO ===================
ECHO Default
CALL %RIVAPATH% /sd0 /wi1,70,18,41 /sd2 /wi1,70,18,41
GOTO END
:1.30v
ECHO ===================
ECHO 1.30v
CALL %RIVAPATH% /sd0 /wi1,70,18,44 /sd2 /wi1,70,18,44
GOTO END
:1.35v
ECHO ===================
ECHO 1.35v
CALL %RIVAPATH% /sd0 /wi1,70,18,48 /sd2 /wi1,70,18,48
GOTO END
:1.40v
ECHO ===================
ECHO 1.40v
CALL %RIVAPATH% /sd0 /wi1,70,18,4C /sd2 /wi1,70,18,4C
GOTO END
:1.45v
ECHO ===================
ECHO 1.45v
CALL %RIVAPATH% /sd0 /wi1,70,18,50 /sd2 /wi1,70,18,50
GOTO END
:1.50v
ECHO ===================
ECHO 1.50v
CALL %RIVAPATH% /sd0 /wi1,70,18,54 /sd2 /wi1,70,18,54
GOTO END
:1.55v
ECHO ===================
ECHO 1.55v
CALL %RIVAPATH% /sd0 /wi1,70,18,58 /sd2 /wi1,70,18,58
GOTO END
:1.60v
ECHO ===================
ECHO 1.60v
CALL %RIVAPATH% /sd0 /wi1,70,18,5C /sd2 /wi1,70,18,5C
GOTO END
:1.65v
ECHO ===================
ECHO 1.65v
CALL %RIVAPATH% /sd0 /wi1,70,18,60 /sd2 /wi1,70,18,60
GOTO END
:END
exit

One environment variable to change at the start to make it easier for others to customise

I'm on XP where MS decided to leave the CHOICE command out so I can't test this. The CHOICE command is back in Vista and Windows 7.

Mr Paul · 28 Jan 2009 at 11:05

Anyone have any luck on a 4850?

ViRuS2k · 28 Jan 2009 at 11:19

tested and works on my 4870x2, though im unsure what to stick it at

would be great for some comparisons for instance.

what voltage for example what gpu speed

like this

800 = 1.26v
840 = 1.30v
860 = 1.45v
ect ect

has anyone went though extensive tests to make sure there gpus dont freeze up ect under higher gpu mhz under more voltage.

[timko] · 28 Jan 2009 at 11:30

Mr Paul said:
Anyone have any luck on a 4850?

All the 4850 users that tried it over at XS have reported no luck

gurusan · 28 Jan 2009 at 11:34

Most 4850s have an analogue VRM circuit.

Bradley8988 · 28 Jan 2009 at 13:36

Bit of a n00b at this. Iv modded the bios already from 1.12v(stock) to 1.15v but looking go to 1.18v. In the OP you have Idle and load voltage but idk what im missing but mines always 1.15v. If someone can help me out as iv never really done anything like this and i suck with maths.

Voltage as of now. This is sat doing nothing.

Stock at the mo.

Number 3 came back with a result.

With the #3 from the last result these are what i got from them.

#15

#16

#17

#18

Anyone decent with maths would be helping me out a lot.

Mr Paul · 28 Jan 2009 at 14:05

Damn

Bradley8988 · 28 Jan 2009 at 14:27

Really dont understand a lot but am i right in thinking that #15 is my 3d voltage?

gurusan · 28 Jan 2009 at 14:29

Brad #15 is what you want to replace..the GTX 280s are actually 1.1875V...so if you wanted 1.1875V then that means you want the Deci number 59.... ( 59*.0125+.45 = 1.1875) which is the Hex number 3B

So to change that value then you type

rivatuner /wi3,70,15,3B

Or if you wanted 1.175V then

rivatuner /wi3,70,15,3A