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B660 motherboard doesn't support Radeon 7750 (UEFI, legacy mode)

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Hi,

I have a MSI Radeon 7750 GPU which is working perfectly fine in combination with a C2Q 8500 and DDR2 RAM. This is a PC my mom uses, so I decided to upgrade it.
I bought a B660 motherboard, i3 12100F and 2x8GB DDR4 3000. That way I can reuse the already in working PSU, GPU, HDD/SDDs and case.
When I assembled everything, the PC was not booting up (no output on the monitor), so I went error hunting.
After some time, I found LEDs on the motherboard, which tell me that the GPU seems to be the problem. I assumed the problem is in the connection, since I have a very old 19" LCD with VGA, but connecting through a VGA -> DVI cable with the GPU. This was not the case. My friend had some other parts and he tried the GPU on his PC, and it is working fine. He has, I guess, an older 2nd or 3rd generation Intel i3 (i3 2xxx or i3 3xxx) system. He has the same GPU, we bought it almost in the some month, 9-10y back, so we cannot test another GPU.
I wrote a mail to the MB manufacturer and he gave me a hint, that this might be a problem with UEFI / legacy mode on the GPU, and that the motherboard only supports GPUs with UEFI mode. I assembled a few PCs myself, consider myself someone with OK knowledge about PCs and IT. I had a Pentium4, Core2Duo, Core2Quad, Ryzen Zen 2700X and now a i3 12100F (which I never saw in action) and I never heard that the GPUs had UEFI mode and never system don's support older cards without UEFI. On my follow-up question to the MB OEM, on which GPU generation have the UEFI mode, so that I can purchase a used GPU (since I want an office PC, not a gaming rig), the answer did not help me at all. I got the reply to check GPU-Z, since there is a checkbox which depicts the UEFI mode available or not.
This reply is really not helpful, I have no access to a DB where I can get this info. Anyway, since I read a lot of reviews on TechPowerUp, I wanted to ask the community on weather someone has the idea, which GPU (AMD or nVidia) have a UEFI mode.
There is also another option, for me to sell the i3 and get a Core i5 12400, which has an integrated GPU. But this would be option 2, because I would need to sell the i3 first.
Thanks for any clues :)

One info maybe, I was not able to find anything regarding UEFI mode on the AMD/nVidia product websites.
Maybe I was not looking in the right place, but on the first few glances I couldn't find it.
 
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ARF

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If you don't need a dedicated graphics card, simply sell the -F processor and buy any non-F processor with active integrated graphics.
 
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@Final_Fighter is able to add UEFI support

I was able to move my ASUS HD7750-1GD5-V2 to UEFI
 
D

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Hi,

I have a MSI Radeon 7750 GPU which is working perfectly fine in combination with a C2Q 8500 and DDR2 RAM. This is a PC my mom uses, so I decided to upgrade it.
I bought a B660 motherboard, i3 12100F and 2x8GB DDR4 3000. That way I can reuse the already in working PSU, GPU, HDD/SDDs and case.
When I assembled everything, the PC was not booting up (no output on the monitor), so I went error hunting.
After some time, I found LEDs on the motherboard, which tell me that the GPU seems to be the problem. I assumed the problem is in the connection, since I have a very old 19" LCD with VGA, but connecting through a VGA -> DVI cable with the GPU. This was not the case. My friend had some other parts and he tried the GPU on his PC, and it is working fine. He has, I guess, an older 2nd or 3rd generation Intel i3 (i3 2xxx or i3 3xxx) system. He has the same GPU, we bought it almost in the some month, 9-10y back, so we cannot test another GPU.
I wrote a mail to the MB manufacturer and he gave me a hint, that this might be a problem with UEFI / legacy mode on the GPU, and that the motherboard only supports GPUs with UEFI mode. I assembled a few PCs myself, consider myself someone with OK knowledge about PCs and IT. I had a Pentium4, Core2Duo, Core2Quad, Ryzen Zen 2700X and now a i3 12100F (which I never saw in action) and I never heard that the GPUs had UEFI mode and never system don's support older cards without UEFI. On my follow-up question to the MB OEM, on which GPU generation have the UEFI mode, so that I can purchase a used GPU (since I want an office PC, not a gaming rig), the answer did not help me at all. I got the reply to check GPU-Z, since there is a checkbox which depicts the UEFI mode available or not.
This reply is really not helpful, I have no access to a DB where I can get this info. Anyway, since I read a lot of reviews on TechPowerUp, I wanted to ask the community on weather someone has the idea, which GPU (AMD or nVidia) have a UEFI mode.
There is also another option, for me to sell the i3 and get a Core i5 12400, which has an integrated GPU. But this would be option 2, because I would need to sell the i3 first.
Thanks for any clues :)

One info maybe, I was not able to find anything regarding UEFI mode on the AMD/nVidia product websites.
Maybe I was not looking in the right place, but on the first few glances I couldn't find it.
It's less likely the video card/s are an issue than a motherboard issue.

Had this issue with 2 B660 boards I have....

If the b600 (which ever make and model.... uh...) has the flash back feature, use that and update the bios.

Alternatively, which is what I did, restart the PC 3 times. Then the 4th time do a complete shut down and cold start the board. Wash rinse repeat.
At some point, the board should come out of dumb mode and post with a warning about CSM.
Immediately update the motherboard bios.
Once you've done this, the board should post with legacy cards even with a clear cmos without issues.

Anyways, good luck. It's a bit of a pain. Btw, my boards are both Asus B660, one is the itx rog, the other model G.
 
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Legacy BIOS GPUs will work on newer PCs only if secure boot is disabled and the CSM is enabled and set to legacy only mode.

However, an UEFI compatible BIOS should be available for the HD 7750. It's one of the earliest cards that got one.
 
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Interesting thread, got me searching for UEFI bios for my 2 Sapphire HD7870 GHz OC edition cards, but no such thing on the TPU database. Wonder why its sibling, the HD7750 got one though....
 

aQi

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Please state your motherboard vendor and model. There is a work around if its gigabyte
 

izy

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You can mod your vbios to add UEFI support or you can search techpowerup database to get one for your card that already has UEFI support and flash it to you video card on a working system.(someone here already linked you a vbios with uefi for your card)
Second option would be to get a working card on your system and disable secure boot and ena le CSM in your bios, nowdays some vendors enable secure boot by default because of windows 11 requirements.
Be sure you reset your bios first (remove the motherboard battery) maybe you are lucky and secure boot and uefi is not enabled by default and they were somehow set at a different time then check if you get video signal.

Interesting thread, got me searching for UEFI bios for my 2 Sapphire HD7870 GHz OC edition cards, but no such thing on the TPU database. Wonder why its sibling, the HD7750 got one though....
You can add it yourself if you want to your current vbios.
 
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Thanks for everyones input. Latest december I will have access to the PC. Keep you posted.
 
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aQi

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Gigabyte B660 DS3H DDR4


sorry, just saw this, I replied above, yes it is Gigabyte.
If you still own it and have a spare vga for example I used a cheap 1gb Nvidia GT620 to get post display on the same motherboard.
Or
By chance just borrow a cpu with IGP.

Once you get into the bios

Go to "BOOT" and set "VGA support" to "AUTO"
And then set "Other PCI devices" to "Legacy"

Save and restart.

This has worked 100% with the same motherboard and you may use any of your desired vga after this. Also if you can do keep your bios to the latest version.

Iv attached bios screens of a friend's PC I build with the same motherboard and did the same configuration to post successfully. Take a look, it might give you the settings idea. Sorry for the crappy phone camera.
IMG-20220603-WA0024.jpg
IMG-20220603-WA0023.jpg
 
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If you still own it and have a spare vga for example I used a cheap 1gb Nvidia GT620 to get post display on the same motherboard.
Or
By chance just borrow a cpu with IGP.

Once you get into the bios

Go to "BOOT" and set "VGA support" to "AUTO"
And then set "Other PCI devices" to "Legacy"

Save and restart.

This has worked 100% with the same motherboard and you may use any of your desired vga after this. Also if you can do keep your bios to the latest version.

Iv attached bios screens of a friend's PC I build with the same motherboard and did the same configuration to post successfully. Take a look, it might give you the settings idea. Sorry for the crappy phone camera.
View attachment 267655View attachment 267656
I will bring my own (1660 SUPER) and try it on my mothers PC, since I don't have any other option (CPU + IGP or at least to borrow a GPU from someone).
Thanks for the advice, end of December I will let you know if it worked or not
 
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izy

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I will bring my own (1660 SUPER) and try it on my mothers PC, since I don't have any other option (CPU + IGP or at least to borrow a GPU from someone).
Thanks for the advice, end of December I will let you know if it worked or not
You can also try to spam "delete" button (or whats the key to enter bios) when you start your computer maybe it will go in BIOS and maybe you will get video output.
 

aQi

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You can also try to spam "delete" button (or whats the key to enter bios) when you start your computer maybe it will go in BIOS and maybe you will get video output.
Trust me thats not gona work. The motherboard will still show keyboard numpad light but there wont be any display output even if you press delete continuesly to enter the bios.

I will bring my own (1660 SUPER) and try it on my mothers PC, since I don't have any other option (CPU + IGP or at least to borrow a GPU from someone).
Thanks for the advice, end of December I will let you know if it worked or not
I will work I'm sure of it :)
 

izy

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It is a bit weird that a motherboard has UEFI enabled by default, maybe thats the case with new motherboards.
 
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It is a bit weird that a motherboard has UEFI enabled by default, maybe thats the case with new motherboards.
I guess so, this is, IMHO, the industries way of saying: get rid of your old HW and buy new shiny things
 
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aQi

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It is a bit weird that a motherboard has UEFI enabled by default, maybe thats the case with new motherboards.
Thats typically the case with gigabyte ones i presume. I have used high end ones with even bitter gpus and bios does actually posts warning that the gpu is in non uefi mode and switching to legacy support automatically (i saw on asus) Thats the case where some of the motherboards in the market do not have an auto feature and have to set setting manually.
 
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It is a bit weird that a motherboard has UEFI enabled by default, maybe thats the case with new motherboards.

Does anyone know what happens if BIOS is the default but one is running UEFI and the CMOS battery runs out?
 
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Does anyone know what happens if BIOS is the default but one is running UEFI and the CMOS battery runs out?
CMOS drains out, the motherboard will always load factory default NVRAM settings, most current mboards will be set to AUTO or UEFI by default
 
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I tried an X300 on Z490 gigabyte mobo sometime ago, if you enable csm it works like clockwork
 

izy

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Does anyone know what happens if BIOS is the default but one is running UEFI and the CMOS battery runs out?
It will boot with the default values , if default was UEFI then it will boot with UEFI and so on..
 
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