CSAA (the mode of AA Maxwell 2.0 dropped), has nothing to do with SGSSAA (which is DSR with rotated pattern and lacking "blur" filter on top).

Joseph_Joestar wrote on 2025-02-06, 08:06:

Not true. There is at least one official driver version which supports both GTX 970 and 980 cards under WinXP. See here. […]
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quigonhu wrote on 2025-02-06, 08:00:

Well, please remember there's no official driver for the NV's GPUs higher than GTX960.

Not true. There is at least one official driver version which supports both GTX 970 and 980 cards under WinXP. See here.

One the other hand, GTX960's performance is far more enough for the whole generation of the entire WinXP era.

Normally, that would be correct. But if you force 8xSGSSAA at 1600x1200 (and higher resolutions) for enhanced image quality, you may start running into GPU limitations with some WinXP titles from the mid-late 2000s.

and that is why I have a GTX 780 Ti in my XP rig, it smokes a GTX 960 and has offical support

I have a Gtx 960 with 2Gb of Vram and the 368.81 driver installed running Windows Xp 32bit and haven't noticed anything like that in any game (COD 4 included).

Does the motherboard support resizable BAR or above 4GB addressing? If so, I would try the opposite settings they are currently on to see if that changes anything.

Are chipset drivers and BIOS up to date on the motherboard?

What about using XP x64?

only tried xp x86, motherboards tested ivy bridge-E on X79 with 4gb gtx980 and C2D on P45 with 4gb gtx960... still cant find a cheap-enough 2gb 960 to test what happens if I only swap the card without touching anything else... xp64 even if it works is made obsolete by win7, xp x86 can run old stuff that doesnt like 64bit os, such as the modding tools for retail cd version of serious sam

cyclone3d wrote on 2025-02-19, 00:19:

Does the motherboard support resizable BAR or above 4GB addressing? If so, I would try the opposite settings they are currently on to see if that changes anything.

Are chipset drivers and BIOS up to date on the motherboard?

What about using XP x64?

Re-Bar is only available on RTX 3000 series and RX6000 series and later though so even if the board does support it, XP and anything before the RTX 3000 cards dont.

So that option does nothing even if you turn it on.

IIRC some 180tis got vbios patches for it but I cant find any info about it actually happening.

For Re-BAR support you need a X570 AMD or Z390 Intel or newer chipset.

chrismeyer6 wrote on 2025-02-25, 13:01:

For Re-BAR support you need a X570 AMD or Z390 Intel or newer chipset.

Not correct, Re-Bar support has technically existed since PCIe 2.0 it was just never shown in the BIOS, even my old X299 motherboard fully supports it, there are a lot of 300 and 400 series boards on AMD that also fully support it.

You need three things to get it to work BIOS,GPU and OS, so if only the BIOS supports it and the OS and/or GPU dont then there is little point in even enabling it in the BIOS as it will do nothing.

There is actually quite a lot of modded Drivers and Vbios updates available to get older GPUs and Motherboards working with SAM/Re-Bar.

If OS support is needed as well, guess it doesnt apply to winXP then. Actually that reminds me a friend built a win7 PC with ryzen 7800x3d and rx 6950xt and was unable to enable rebar

God Of Gaming wrote on 2025-03-04, 12:46:

If OS support is needed as well, guess it doesnt apply to winXP then. Actually that reminds me a friend built a win7 PC with ryzen 7800x3d and rx 6950xt and was unable to enable rebar

Re bar requires a bit of fiddling in the BIOS to turn it on, most recent ones though you just activate the Re-Bar option and it sets all the other settings it needs.

Ive had a few older ones that require you to set the Secure Boot option to on before you can activate the Above 4G decoding as Re-Bar doesn't work with CSM boot mode.

I dont have an AMD GPU but it may require turning on the SAM option in the GPU control panel ...not sure

God Of Gaming wrote on 2025-03-04, 12:46:

If OS support is needed as well, guess it doesnt apply to winXP then. Actually that reminds me a friend built a win7 PC with ryzen 7800x3d and rx 6950xt and was unable to enable rebar

Small side note : Are drivers for his RX 6950 XT also broken under Win7 ? (ie. no DX10/11 support)

agent_x007 wrote on 2025-03-04, 20:08:

God Of Gaming wrote on 2025-03-04, 12:46:

If OS support is needed as well, guess it doesnt apply to winXP then. Actually that reminds me a friend built a win7 PC with ryzen 7800x3d and rx 6950xt and was unable to enable rebar

Small side note : Are drivers for his RX 6950 XT also broken under Win7 ? (ie. no DX10/11 support)

Im not sure Win7 understand Re-Bar either and I doubt AMD made GPU drivers for 7 that have Re-Bar in them. (Just checked and AMD doesn't support Win7 and SAM so no SAM capable Win7 drivers exist officially)

Im going to be upfront here, as good as Win7 was I dont know why you wold use a 7800X3D and a 6950XT under Win7, that OS cannot ever used the full capabilities of that hardware.

yeah, he isn't very happy with how it turned out. Meanwhile I use one of those frankenstein rtx 3060m 3840sp cards in my win7 pc and Im very pleased with it, it performs seemingly around as fine as a 1080ti and only draws 80w under load and is dead silent

Trashbytes wrote on 2025-03-05, 00:03:

Im not sure Win7 understand Re-Bar either and I doubt AMD made GPU drivers for 7 that have Re-Bar in them. (Just checked and AMD doesn't support Win7 and SAM so no SAM capable Win7 drivers exist officially)

Im going to be upfront here, as good as Win7 was I dont know why you wold use a 7800X3D and a 6950XT under Win7, that OS cannot ever used the full capabilities of that hardware.

Rebar is afterthought. Card doesn't support feature level DX10/DX11 under Win7 (games display "card doesn't support DirectX features"). - THAT makes it pointless as Win7 capable GPU (dxdiag video = "DirectX9L" support). RTX 30 and lower don't have such massive issues under Win7 x64. Same with OpenGL BTW.

agent_x007 wrote on 2025-03-05, 17:24:

Trashbytes wrote on 2025-03-05, 00:03:

Im not sure Win7 understand Re-Bar either and I doubt AMD made GPU drivers for 7 that have Re-Bar in them. (Just checked and AMD doesn't support Win7 and SAM so no SAM capable Win7 drivers exist officially)

Im going to be upfront here, as good as Win7 was I dont know why you wold use a 7800X3D and a 6950XT under Win7, that OS cannot ever used the full capabilities of that hardware.

Rebar is afterthought. Card doesn't support feature level DX10/DX11 under Win7 (games display "card doesn't support DirectX features"). - THAT makes it pointless as Win7 capable GPU (dxdiag video = "DirectX9L" support). RTX 30 and lower don't have such massive issues under Win7 x64. Same with OpenGL BTW.

The attachment Radeon fail.png is no longer available

That will be AMD dropping support for Win7 in their drivers, IIRC nvidia didn't but neither support Re-Bar under 7.

Dropping support doesn't make card unusable, but being lazy in making driver for it very much does.
As per AMD page, RX 6950 XT does have official support for Win7.
Being dropped, shouldn't mean card's basic functionality is compromised after X point in time 🤣.

It's not compatible with Crysis :

You have something weird going on there ...

agent_x007 wrote on 2025-03-06, 00:22:

Dropping support doesn't make card unusable, being lazy in making driver for is though. As per AMD page, RX 6950 XT does have of […]
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Dropping support doesn't make card unusable, being lazy in making driver for is though.
As per AMD page, RX 6950 XT does have official support for Win7.
Being dropped, shouldn't mean card's basic functionality is compromised after X point in time 🤣.

The attachment WDDM support mini.jpg is no longer available

It's not compatible with Crysis :

The attachment Crysis support.jpg is no longer available

Look at the DirectDraw HARDWARE DRIVER name, you will see the issue isn't on AMD 😉

Also WDDM1.1 is ancient

Right, I will write bug in driver to ATI HQ in AMD HQ 😁

Also, it's Windows 7 SP1 x64 - not sure what version of WDDM you expect to see on it ?

agent_x007 wrote on 2025-03-06, 08:01:

Right, I will write bug in driver to ATI HQ in AMD HQ 😁

Also, it's Windows 7 SP1 x64 - not sure what version of WDDM you expect to see on it ?

Edit:
I have WDDM 1.1 on a 4th gen Intel iGPU. WDDM isn't the issue. Driver file is