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Nvidia 8400M GS Modding


Lance D'souza

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ive got 2 say this actually worked!

heres my gpu-z ss:

comparisontx9.th.png

i tested in crysis to see if there was any difference and i used the following 3 graphics cards:

nVidia GeForce 8400M GS 256MB(stock)

nVidia geForce 8600M GS 256MB(nVidia 8400M GS modded)

nVidia GeForce 8400 GS 256MB(my desktop's card)

800x600 on medium settings:

8400M GS: 19FPS

8600M GS: 23FPS [Overclocked to 500/467= 28FPS]

8400 GS: 25FPS

high settings:

8600M GS(8400M GS modded): Overclocked to 500/467: 21FPS

8400 GS(desktop, stock: 567/500) Overclocked to 657/600: 20FPS

i did gain a little fps but not much. my desktop card has 567/500 clocks compared to laptop's 400/400 so dats why i got lower fps.

i mite try da same mod on my desktop :)

UPDATE: ran 3dmark06 and was supprised, the card ran slower than wen it was a normal 8400m gs.

8400m gs stock got 1699 marks & 8600m gs with none of the rop, 128-bit mods got 1718.

so just by changing it from 8400m gs to 8600m gs gets you better performance(not noticeable much tho)

Edited by ssj92
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Guest shforce

Hi All!

I got a Sony VAIO VGN-R38S/S whit 8400 GT (G86M,64 Bit, GDDR3 128 MB, ROPs: 4, Shaders: 16,). A try modding this card to 8600 GS but when i restart the laptop... The Xp boot screen is freezed :S... And i must reistall evrythig... But i don't wanna give up :) ....

Anybody have any idea how can i modding this card?

Sorry my English is weak :) ....

THX

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Yea I didn't really expect any major change, I already knew about the clock speeds and looked up the 8700M specs on nVidia last night and tried to match them in every way but I felt it would be too risky matching the clock speed so I left it the same. Some other 8400M owners who did this mod for an 8600M got about 20-30 fps more in some games running at the same clock speed so I don't know what gives! I have a normal 8600M trying to get 8700M.

11110011 00000011 00000000 00000001 (Original binary)

11110011 00000111 00000000 00000011 (Modded binary that was for 8400M to 8600M tutorial - Gives me 16 shaders)

I've modded it to be this:

11110011 00000111 00000000 00000001 (Gives me back my 32 shaders and increases from 8 flops to 12 flops)

Here's my GPU-Z before and after the mod:

BEFORE: (8600M GT 256MB GDDR2 using

11110011 00000011 00000000 00000001 original binary)

8600MGTGPUZ.jpg

AFTER: (8700M GT 256 GDDR2 using 11110011 00000111 00000000 00000001 my modded binary)

8700MGT.jpg

Not really sure of where to go from here except mess around with the binary but I really don't quite know what I'm doing, or if these new rates I'm getting are just for show and not really changing my performance at all. Any help appreciated.

I will also try the mod you did. The difference is that I have a laptop with a 8600M GS (mobile) video card. I will post afterwords if Any improvement are seen.

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No improvements are seen. NONE!

Also tried enabling all the possible bit masks, al the 0 turned to 1. I had a showing of a super video card, with 64 Unified Shaders and 16 pixel pipelines. The performance was exactly the same.

The only performance increase is after Over Clocking. Most possible reason for this is laser cut pipes since I know that a 8600 GS was supposed to have at least 16 pipelines not 8 as mine has. Other thing I must note.. I was expecting though some artefacts or not booting at all after changing all the 0's to 1. This leeds me to believe that Riva Tuner might not actually do anything of importance to determine the use of other setups.

I have to say that I'm pretty disappointed cos in the past I have successfully used a Radeon 9800 SE as a 9800 Pro which had originally 4 Pixel pipelines and enabled all 8 pipelines with an exactly double performance increase!

For those interested in turning their video card in to Quadro, this can be successfully done with Riva Tuner. But you will only see new features and performance increase in CAD programs.

Also, note that Installing straps driver and changing the PCI Device ID will make you loose standby ability. If you run Riva Tuner under Vista you can only install straps driver after booting with F8 and selecting Enforce Driver signing.. thing. You can automate booting this way using a program called Ready Driver Plus.

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No improvements are seen. NONE!

Also tried enabling all the possible bit masks, al the 0 turned to 1. I had a showing of a super video card, with 64 Unified Shaders and 16 pixel pipelines. The performance was exactly the same.

The only performance increase is after Over Clocking. Most possible reason for this is laser cut pipes since I know that a 8600 GS was supposed to have at least 16 pipelines not 8 as mine has. Other thing I must note.. I was expecting though some artefacts or not booting at all after changing all the 0's to 1. This leeds me to believe that Riva Tuner might not actually do anything of importance to determine the use of other setups.

I have to say that I'm pretty disappointed cos in the past I have successfully used a Radeon 9800 SE as a 9800 Pro which had originally 4 Pixel pipelines and enabled all 8 pipelines with an exactly double performance increase!

For those interested in turning their video card in to Quadro, this can be successfully done with Riva Tuner. But you will only see new features and performance increase in CAD programs.

Also, note that Installing straps driver and changing the PCI Device ID will make you loose standby ability. If you run Riva Tuner under Vista you can only install straps driver after booting with F8 and selecting Enforce Driver signing.. thing. You can automate booting this way using a program called Ready Driver Plus.

why no increased performance? because ur tryin a software mod on something that is either hardware limited(theres hardware dat limits true capabilities) or the card doesnt have the hardware at all. i realized doing all this was pretty useless & if some people got better performance they must of been lucky or had a different version of the 8400m gs , one that is less restricted.

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why no increased performance? because ur tryin a software mod on something that is either hardware limited(theres hardware dat limits true capabilities) or the card doesnt have the hardware at all. i realized doing all this was pretty useless & if some people got better performance they must of been lucky or had a different version of the 8400m gs , one that is less restricted.

Some cards are just underclocked, reflashed versions of better cards, but some aren't on the other hand, it's hit and miss whether you get any extra juice out of the card.

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Some cards are just underclocked, reflashed versions of better cards, but some aren't on the other hand, it's hit and miss whether you get any extra juice out of the card.

well , i decided to mess around again with my 8400m gs and this time i also overclocked it from 400/400 to 500/450

(i did da complete 8400m gs 4rop 64-bit to 8600m gs 8rop 128-bit mod) & got 2370 marks on 3dmark, i think overclocking got me around 100-200 more but i noticed this time that i actually got to 2000 marks. ill test out crysis & gta4 & post results l8r

UPDATE 1: Crysis @ 852x480 resolution on medium settings got me 20fps (card was overclocked to 500/450)

(on 8400M GS i got around 14-16fps with same settings so i guess i got a little fps increase)

GPU-Z Screenshot:

sscardqw6.th.png

GPU-Z Temperature SS:

tempswu3.th.png

Crysis Screenshots:

crysis2008120422055735mj2.th.png

crysis2008120422091925ui2.th.png

crysis2008120422112623ku2.th.png

crysis2008120422184981fx2.th.png

kinda felt like trying out 1365x768 all high settings with 2x AA enabled & got 3fps :) =) [imageshack shrinks image dl full quality version below da thumbnail!)

crysis2008120422235950ht5.th.png

Download Full Quality Version

Call of Duty 2 Screenshot (1440x900, All settings on High, Texture Quality on Extra, 4x AA, AF Enabled & DirectX 7 Render Mode): 30fps average

cod2sps2008120422433659zr0.th.jpg

Download Full Quality Version

i will try gta4 next & post results l8r

Edited by ssj92
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  • 1 month later...
Just a quick post to correct this person who seems to think whatever he/she types is absolute and irrefutable truth.

WHY THE HECK NOT ANSWER THE DAMN QUESTION ? Why rather give a whole speech on how useless it is ?

Because you see, as a matter of fact, switching from 8600GTS to FX1700 actually has its importance on some piece of software, like the one mentionned by the poster: 3dsmax. Quadros have a different approche on highend 3d software, so there can be many valid reasons for wanting to switch, especially in this industry.

This very thread happens to have helped me do this exact trade via rivatuner, and that actually fixed the problem I'd be having with maya for a long time, since it has serious display issues with the geforce series.

So there you go, your post could've helped me, and maybe many others, but guess what: it was the most useless response one could've ever given.

And, I for one don't know a lot about this flashing thing and all, but if nvidia wants ppl to stop doing that, maybe they should think of actually doing their job and making up cards and drivers that work properly. If rivatuner can get my bug fixed, there's no reason nvidia couldn't, if only they gave a damn.

Well, the post is about modding the 8400M GS to a 8600M, which is useless, and proven. Yet, so many ppl just keep on wanting to switch out those pipelines that didnt exist. So in the end, they end up overclocking, which is the way to get more FPS. So my post is useless for telling ppl that this mod is impossible? Its useless telling ppl that mod could potentially harm your computer?

Also, this post is not for ppl using CAD softwares, we are trying to squeeze the extra FPS from games, as the author himself wants to improve performance in Crysis and 3DMark. So if the softquardo helped u in the CADs, dont said that i am totally wrong, because we are talking about games. Dont get too excited just beucase u discovered that softquardo helps u in CAD programmes.

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  • 1 month later...
  • 1 month later...
Guest Guest

Hello,

a great Tread about the 8400m Gs!

Would somebody be please so kind and upload or eMail me his vBIOS?

The Type of Notebook its from dont matters - it must be only from a 8400m gs Gpu...

( Flashed mine by foult with a 8600m gt vBIOS :-()

Thanks Mike!.-)

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  • 1 year later...

hi

mine

lenovo y410 nidia 8400m gs 128 mb ddr2 64 bit

it has a problem with last three months

problem is split screens

any thing displays two displays (top and bottom )...can u help me .....at present my clock speeds rrrr....how can i change r whats the solutions

Field Value

Graphics Processor Properties

Video Adapter nVIDIA GeForce 8400M GS (Lenovo)

GPU Code Name G86M

PCI Device 10DE-0427 / 17AA-3862 (Rev A2)

Transistors 210 million

Process Technology 80 nm

Bus Type PCI Express 1.0 x16 @ x16

Memory Size 128 MB

GPU Clock (Geometric Domain) 275 MHz

GPU Clock (Shader Domain) 550 MHz

RAMDAC Clock 400 MHz

Pixel Pipelines 4

TMU Per Pipeline 1

Unified Shaders 16 (v4.0)

DirectX Hardware Support DirectX v10

Pixel Fillrate 1100 MPixel/s

Texel Fillrate 2200 MTexel/s

Memory Bus Properties

Bus Type DDR2

Bus Width 64-bit

Real Clock 200 MHz (DDR)

Effective Clock 400 MHz

Bandwidth 3200 MB/s

Field Value

CPU Properties

CPU Type Mobile DualCore Intel Core 2 Duo T7250

CPU Alias Merom-2M

CPU Stepping M0

Engineering Sample No

CPUID CPU Name IntelĀ® Core2 Duo CPU T7250 @ 2.00GHz

CPUID Revision 000006FDh

CPU VID 1.2875 V

CPU Speed

CPU Clock 798.0 MHz (original: 2000 MHz)

CPU Multiplier 8x

CPU FSB 99.7 MHz (original: 200 MHz)

Memory Bus 166.2 MHz

DRAM:FSB Ratio 10:6

CPU Cache

L1 Code Cache 32 KB per core

L1 Data Cache 32 KB per core

L2 Cache 2 MB (On-Die, ECC, ASC, Full-Speed)

Motherboard Properties

Motherboard ID <DMI>

Motherboard Name Lenovo IGT30

Chipset Properties

Motherboard Chipset Intel Crestline-PM PM965

Memory Timings 5-5-5-15 (CL-RCD-RP-RAS)

DIMM1: Ramaxel Tech. RMN1740HC38D7F-667 1 GB DDR2-667 DDR2 SDRAM (5-5-5-15 @ 333 MHz) (4-4-4-12 @ 266 MHz) (3-3-3-9 @ 200 MHz)

DIMM3: Ramaxel Tech. RMN1740HC38D7F-667 1 GB DDR2-667 DDR2 SDRAM (5-5-5-15 @ 333 MHz) (4-4-4-12 @ 266 MHz) (3-3-3-9 @ 200 MHz)

BIOS Properties

System BIOS Date 03/26/08

Video BIOS Date 01/29/08

DMI BIOS Version 05CN63WW(V3.05)

Graphics Processor Properties

Video Adapter nVIDIA GeForce 8400M GS (Lenovo)

GPU Code Name G86M (PCI Express 1.0 x16 10DE / 0427, Rev A2)

GPU Clock (Geometric Domain) 275 MHz

GPU Clock (Shader Domain) 550 MHz

Memory Clock 200 MHz

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  • 1 year later...

Very helpful info.

I am trying to mod nvs 135m to 8400m gs, but after I change the device ID the card turns into Standard VGA Gaphic Adapter in device manager, GPU-Z and Rivaturner cannot detect the card any more...

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