Math Confusion

[eidairman1]

Does anyone know a math equation to determine Vram capacity on a gpu by studying specs sheets and also find out the bit rate?

Im having difficulty determing if a specific 1050/ti card has 2 or 4GiBs of ram (2048/4096).

www.micron.com/products/graphics-memory/gddr5/part-catalog/mt51j256m32hf-70

I don't want to assume 4 chips is 4GiBs and not 2GiBs.

I know with binary stuff say 2,4,8,16 physical chips, which are even by binary standards a person could have a 64,128, 256,512 bit bus. But numbers like 3,6,9,12 (tend to be odd) for physical chips the bus is normally 96, 192, 384, 768 etc, etc.

[eidairman1]

I guess i missed the mark...

[Bones]

Give it time, someone can shed some light on this.

I can't or I'd go ahead and tell you what you want to know.
How about it guys?

[Macsbeach98]

I havent got time to read the datasheet at the moment.
A quick look on the bot it seems all 1050 cards are 2Gb and all 1050Ti are 4Gb both are 128bit wide bus

[cbjaust]

8Gb GDDR5 ICs have a 32 bit interface so for a 128 bit bus you need 4 ICs minimum and an 8Gb IC is equal to 1GiB so I would say the card you're looking at has 4 GiB of GDDR5. that's my understanding, hope is helps.

[eidairman1]

Feb 5, 2019 21:17:09 GMT -5 cbjaust said:

8Gb GDDR5 ICs have a 32 bit interface so for a 128 bit bus you need 4 ICs minimum and an 8Gb IC is equal to 1GiB so I would say the card you're looking at has 4 GiB of GDDR5. that's my understanding, hope is helps.

Yeah 8gibibit=1GibiByte, so this card is probably 4GibiBytes.

I forgot about 8bits= 1byte and half a byte is a nibble=4bits