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RTX4090 compatibility with i9 10900k

Daytrader said:
Why would updating bios help, all worked with a 3080, 4090 no different, i mean never heard of updating the bios for a gpu to work ? or am i missing something, oh the reason im interested is, i will be using my 4090 temporary with my 7 yearold 6700k system, and im hoping i dont get this problem, as there is no updates for my motherboard anyway.
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Don't know exactly why it works (some kind of compatibility issue maybe, similar to what happens with ram), but yes, sometimes it does work.

OP: have you tried propping the card up or using the system horizontal?

I'd assume the dp issues are resolved by now, but could try a different set of cables.
 
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Ok, i hope i don't get any problems when i install 4090 on my old system, as i already have the latest bios on my board, well it is 7 years old now anyway.
 
sometimes if you email support they will update the bios especially for you, I guess it's really simple for them to do in most cases.

just pretend the 4090 you got is from whomever made your mobo :P
 
Tetras said:
Don't know exactly why it works (some kind of compatibility issue maybe, similar to what happens with ram), but yes, sometimes it does work.

OP: have you tried propping the card up or using the system horizontal?

I'd assume the dp issues are resolved by now, but could try a different set of cables.
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PCIE device IDs not recognised by the motherboard BIOS so doesn't know how to use it. BIOS updates help with this and if he probably looked at the BIOS LEDS on the motherboard it will probably state VGA failure or some other error code regarding hardware not detected or recognised.

That's why always wise to update BIOS before a major hardware change.
 
But i am 99% sure if the 3080 was ok with the motherboard, surely the 4090 would be also, zero difference, as 1000's of people will be wanting a new gpu, and they may already have latest bios for there boards, ive never had to update a bios to get a gpu to work, i reckon it has nothing to do with bios myself, hopefully he will come back and tell us.
 
Make sure he's got the extra power cables plugged in correctly, is it 4 8pin cables you need feeding the 12pin?

I wouldn't rule out BIOS update.

New mobo/cpu definitely shouldn't be required.

Make sure the card is properly fitted, a big heavy card like that might be sagging a bit.
 
Daytrader said:
But i am 99% sure if the 3080 was ok with the motherboard, surely the 4090 would be also, zero difference, as 1000's of people will be wanting a new gpu, and they may already have latest bios for there boards, ive never had to update a bios to get a gpu to work, i reckon it has nothing to do with bios myself, hopefully he will come back and tell us.
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I'm not sure why you think this. I've had this in the past as well, going from one gen to the next, of course there is a difference between a 3080 and a 4090, it's a newer GPU. If there's no difference then why upgrade at all
 
andybird123 said:
I'm not sure why you think this. I've had this in the past as well, going from one gen to the next, of course there is a difference between a 3080 and a 4090, it's a newer GPU. If there's no difference then why upgrade at all
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I hope you knew what i meant, course there different cards, but the same almost, my point being, i have had the same motherboard for last 7 years, and loads of different gpus on it, very very unusual to have to update a motherboard for a gpu to work, let alone just one series newer, his 3080 worked fine on it, so no reason what so ever for the 4090 not to work.

Oh, and what about all the millions of people on older motherboards with latest bios already on it(my latest bios was 2018), they all of a sudden cant have a new gpu ? must admit i have never even seen a bios update for my asus motherboard saying its needed for a gpu to work.
 
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Well I definitely had to update my motherboard bios too, for my 4090 to display a picture.

Heard it a few times recently. Red light on motherboard, fans spinning as normal etc.
 
Did you not have your latest bios already installed, or did your motherboard maker, had to release a bios especially for the 4090 to work, well it must be a first, i been building my own pc's for 25 years and not ever heard of this or come across it myself, i stand corrected then.
 
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I had a Bios from March 2022 I believe originally, and there had been an update since then which I updated to. B550 Tommahawk.
 
Daytrader said:
I hope you knew what i meant, course there different cards, but the same almost, my point being, i have had the same motherboard for last 7 years, and loads of different gpus on it, very very unusual to have to update a motherboard for a gpu to work, let alone just one series newer, his 3080 worked fine on it, so no reason what so ever for the 4090 not to work.

Oh, and what about all the millions of people on older motherboards with latest bios already on it(my latest bios was 2018), they all of a sudden cant have a new gpu ? must admit i have never even seen a bios update for my asus motherboard saying its needed for a gpu to work.
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I've had several motherboards that have needed bios updates to get a new GPU working, and yes only one gen newer.
Updates have always been available though, so yes I guess if your mobo manf. decided to stop releasing them then you would be out of luck.
If your PC works with a 3080 and refuses to boot with a 4090 then I would definitely try a bios update before buying a new motherboard entirely.
 
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Purgatory said:
PCIE device IDs not recognised by the motherboard BIOS so doesn't know how to use it. BIOS updates help with this and if he probably looked at the BIOS LEDS on the motherboard it will probably state VGA failure or some other error code regarding hardware not detected or recognised.

That's why always wise to update BIOS before a major hardware change.
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Yeh, i have a 7 year old asus maxuminus III ranger mother board, last bios update was 2018, i hope when i put a 4090 in, its ok, i think it will be thou, fine with a rtx 2080 super.
 
Daytrader said:
Why would updating bios help, all worked with a 3080, 4090 no different, i mean never heard of updating the bios for a gpu to work ? or am i missing something, oh the reason im interested is, i will be using my 4090 temporary with my 7 yearold 6700k system, and im hoping i dont get this problem, as there is no updates for my motherboard anyway.
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LOL it's always been a thing.
Sometimes new graphics cards need a bios update... That's just the way it is.

Maybe the bios contains micro-code specific to certain things to do with the GPU and when a new generation of GPU is released it needs a small update :confused:
 
Must admit, never seen it in my 25 years pf pc gaming and building, well i better hope it works on my old mb, as there aint been a bios update for 4 years, few people i know have added a 4090 to there old mb, and all good, so finger crossed for me.
 
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