Talk:RAM

Main System Memory

The PS3 has 256MB of 64 bit bus Rambus XDR main system memory. Some models use four 64MB Samsung chips, while other models uses four 64MB Elpida chips.

A sample of the Memory chips in different PS3 models:

Type	Size	Speed	Voltage	Packaging	Manufacturer	Serial Number	Description
Rambus XDR	64MB	400MHz	1.8V+/-0.09V	FBGA-104	Elpida	EDX5116ACSE-3C-E	256MB total (4 chips) for PS3 System Memory (Initial Models)
Rambus XDR	64MB	400MHz	1.8V+/-0.09V	FBGA-104	Samsung	K4Y50164UC-JCB3	256MB total (4 chips) for PS3 System Memory (Initial Models)
Rambus XDR	64MB	400MHz	1.8V+/-0.09V	FBGA-100	Samsung	K4Y50164UE-JCB3	256MB total (4 chips) for PS3 System Memory (CECHG,CECHK)
Rambus XDR	64MB	400MHz	1.8V+/-0.09V	FBGA-104	Elpida	X5116ADSE-3C-E	256MB total (4 chips) for PS3 System Memory (CECH-20xx)
Rambus XDR	128MB	400MHz	1.5V+/-0.075V	FBGA-150	Elpida	X1032BASE-3C-F	256MB total (2 chips) for PS3 System Memory (CECH-21xx and later)

Elpida EDX5116ACSE-3C-E

104-ball FBGA
Elpida EDX5116ACSE-3C-E

Datasheet: Elpida EDX5116ACSE

productcode meaning:
E - Elpida Memory
D - Type : Monolithic Device
X - Product Family : XDR RAM
51 - Density : 512M (x16bit)
16 - Organisation : x16bit
A - Supply Voltage : 1.8V, DRSL
C - Die Revision: C
SE - Package : FBGA (with back cover)
-
3C - Speed : 3.2G (tRAC = 35, C Bin)
-
E - Environmental Code : Lead Free

Samsung K4Y50164UC-JCB3

100-ball FBGA
Samsung K4Y50164UC-JCB3

Datasheet: Samsung K4Y50164UC-JCB3

productcode meaning:
K - Samsung Memory
4 - DRAM
Y - Product : XDR RAM
50 - Density : 512M, 32K/16ms(0,49us)
16 - Organisation : x16
4 - Banks : 8
U - Interface : DRSL(1.8V, 1.2V)
C - Generation : 4th
-
J - Packagetype: BOC lead free
C - Temperature & Power: Commercial, Normal Power
B3 - Speed (Data frequency, tRAC, tRC) : 3.2Gbps, 35ns, 24cycles

Samsung K4Y50164UE-JCB3

104-ball FBGA
Samsung K4Y50164UE-JCB3

Datasheet: Samsung K4Y50164UE-JCB3

productcode meaning:
K - Samsung Memory
4 - DRAM
Y - Product : XDR RAM
50 - Density : 512M, 32K/16ms(0,49us)
16 - Organisation : x16
4 - Banks : 8
U - Interface : DRSL(1.8V, 1.2V)
E - Generation : 6th
-
J - Packagetype: BOC lead free
C - Temperature & Power: Commercial, Normal Power
B3 - Speed (Data frequency, tRAC, tRC) : 3.2Gbps, 35ns, 24cycles

Elpida X5116ADSE-3C-E

104-ball FBGA
Elpida X5116ADSE-3C-E

Datasheet: Elpida X5116ADSE-3C-E

productcode meaning:
X - Product Family : XDR RAM
51 - Density : 512M (x16bit)
16 - Organisation : x16bit
A - Supply Voltage : 1.8V, DRSL
D - Die Revision: D
SE - Package : FBGA (with back cover)
-
3C - Speed : 3.2G (tRAC = 35, C Bin)
-
E - Environmental Code : Lead Free

Elpida X1032BASE-3C-F

Datasheet: E1332E50 (EOL)

productcode meaning:
E - Elpida Memory
D - Type : Monolithic Device
X - Product Family : XDR RAM
13 - Density : 1Gbit (128MB) 32Mbitx32 
32 - Organisation : x32bit
B - Supply Voltage : 1.5V +/- 0.075V, DRSL
A - Die Revision: A
SE - Package : FBGA (with back cover)
-
3C - Speed : 3.2G (tRAC = 35, C Bin)
-
F - Environmental Code : Lead & Halogen Free

Graphics Memory

FBGA-136 / on-die
Samsung K4J52324QC-SC14

RSX bare die
GPU in centre
4x GDDR3

Datasheet: Samsung K4J52324QC-SC14

productcode meaning:
K - Samsung Memory
4 - DRAM
J - Product : GDDR3 RAM
52 - Density : 512M, 32ms, 8K
32 - Organisation : x32
4 - Banks : 8
Q - Interface : DRSL(1.8V, 1.2V)
C - Generation : 4th
-
S - Packagetype: BOC lead
C - Temperature & Power: Commercial, Normal Power (1.8V +/- 0.1V)
14 - Speed (Data frequency, tRAC, tRC) : 1.4Gbps

The 256MB of GDDR3 memory is located inside the RSX chip using four 64MB Samsung chips.

Type	Size	Speed	Voltage	Packaging	Manufacturer	Serial Number	Description
GDDR3	64MB	700MHz	2.0V +/-0.1V	FBGA-136 on-die	Samsung	K4J52324QC-SC14	256MB total (4 chips) for PS3 Graphics Memory

PS2 Compatibility Memory

54-ball FBGA
Samsung K4R271669F

Datasheet: Samsung K4R271669F

The earlier models with hardware PS2 compatibility also contained an extra 32MB of RDRAM using two 16MB Samsung chips.

Type	Size	Speed	Voltage	Packaging	Manufacturer	Serial Number	Description
RDRAM	16MB	800MHz	2.50 +/- 0.13V	54-pin	Samsung	K4R271669F	32MB total (2 chips) for Hardware PS2 Compatibility System Memory

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source: http://www.edepot.com/playstation3.html#PS3_Motherboard