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Memory reading hardware registers or bios?

Solaris17

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I have a GTX 750 I brought back from the grave after it was donated for a bad flash. I have been using an eeprom writer to get it back. The sticker on the card reads

N750-1GD5/OC which tells me its a 750 with 1GB GDDR5

without the proper bios in hand I goto the VGA download section. For fun I download the palit bios (this card is an MSI) I flash it and it works (YAY) I boot into the Os install drivers and open GPU-Z, GPU-Z reads the card as having GDDR5 samsung chips and 2GB of VRAM. confused I go back to the VGA DB and download the proper 1GB BIOS for MSI cards thinking its some kind of odd issue with the palit bios.

I make sure to wipe the chips with the flasher BEFORE flashing the new .bin. This time I flash her back with the proper MSI branded bios.

Open GPU-Z and it reads 2GB. I'm about to tear it down and look at the actual ICs but I was wondering what could cause this?

Windows 10 Home x64

Drivers 358.91

after taking it apart it has 4 samsung k4g20325f2-hc04 chips which looks like 1GB package, so this is indeed the 1GB version?
 
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You sure the RAM IC says F2?
 

Solaris17

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I could be wrong, but I believe those are 2Gb chips, so each chip is 256MB. They aren't marked as sets. If you have 4, that makes 1GB.
 

Solaris17

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25,887 (3.79/day)
Location
Alabama
System Name Rocinante
Processor I9 14900KS
Motherboard EVGA z690 Dark KINGPIN (modded BIOS)
Cooling EK-AIO Elite 360 D-RGB
Memory 64GB Gskill Trident Z5 DDR5 6000 @6400
Video Card(s) MSI SUPRIM Liquid X 4090
Storage 1x 500GB 980 Pro | 1x 1TB 980 Pro | 1x 8TB Corsair MP400
Display(s) Odyssey OLED G9 G95SC
Case Lian Li o11 Evo Dynamic White
Audio Device(s) Moondrop S8's on Schiit Hel 2e
Power Supply Bequiet! Power Pro 12 1500w
Mouse Lamzu Atlantis mini (White)
Keyboard Monsgeek M3 Lavender, Akko Crystal Blues
VR HMD Quest 3
Software Windows 11
Benchmark Scores I dont have time for that.
I tried it with new drivers and GPU-Z still reads it as 2GB. I appreciate the help. So its looking like its back at the 1GB version again. At the end of the day im just trying to answer 2 questions.

A: what bios needs to be on it (both function fine)

B: why does GPU-Z report a different size.
 
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