256 MB ( 128 MB x2 ) Infineon 

DS SDR SDRAM DIMM NON-ECC UNBUFFERED 

PC133-322-520*** 168-PIN 3.3-VOLT TESTED LOW-PROFILE 

C2903207 / HYS64V16220GU-7.5-C

LABEL

Infineon

HYS64V16220GU-7.5-C     16MX64 SDRAM

C2903207                             PC100-222-620

Assembled in USA of imported components

128MB, Sync, 133MHz, CL3

CHIP MARKINGS

Infineon

HYB39S64800CT-7.5

C  

WEE 44400 [ tiny ]

0030 [ sideways ]

SPECIFICATIONS

CAPACITY             – 128 MB MegaByte

BRAND                  – Infineon

MODEL                  – C2903207

MPN                       – HYS64V16220GU-7.5-C

CHIP NUMBER      – HYB39S64800CT-7.5

SIDES & CHIPS     – DS Double Sided / 16x memory chips ( per stick )

RANK                     – DOUBLE ( two 64-bit ‘words’ are processed per clock cycle )

DATA RATE           – SDR Single Data Rate ( signal on the rising edge only of the system clock )

TYPE                      – SDRAM Synchronous Dynamic Random Access Memory ( interleaved )

FORM FACTOR     – DIMM Dual Inline Memory Module ( contacts on both sided of PCB )

ERROR CHECK     – NON-ECC does not have Error Correction Code detecting ( non-parity )

CONTROLLER       – UNBUFFERED ( unregistered ) controller-chip is connected to the PCB

STANDARD            – PC133-322-520*** ( frequency / CAS latency / RAS refresh burst current )

FREQUENCY         – 133 MHz memory clock speed runs with a 66 MHz or 100 MHz Bus

CLOCK SPEED      – 7.5 ns Nanoseconds ( billionth of a second ) access of CPU data

CAS LATENCY       – 3 delays in clock cycles from the CPU request to RAM reading

RAS REFRESH       – 45 ns / 0.58% of the memory chip's time is used for refresh cycles 

EDGE CONNECT   – 168 PIN PAD with 84 pins on either side ( gold alloy plated )

POWER                   – 3.3 Volts ( ± 0.3 ) / 4 Watts ( ± 10% )

BANDWIDTH          – 1,067 MBs MegaBytes ( speed of read from or write to hard drive )

TEMPERATURE     – 32° to 158° Fahrenheit / 0° to 70° Celsius ( operating and storage )

TSOP II CHIP          – 16Mx64 Matrix / 16 Meg ( geometry ) deep x 64 Mb Megabit wide

TESTED                  – TechToolPro using a Power Mac G4 – see photos for details

SIZE              length – 133.35 mm

                      height –   31.00 mm LOW-PROFILE ( small form-factor / no performance difference )

                      weight –    0.72 oz

CARE

Careful not to bend or drop the ram or it could break

Keep the unit running in a clean, cool and dry space

COMPATIBILITY

168-pin, 3.3 V, same brand, same PC MHz, same CASL, all slots with same or max RAM = best

168-pin, 3.3 V, mix 2 different brands ok, PC66 / 100 / 133, CASL2 / 3 = runs minimal configuration

***RAS refresh burst current ( 520 / 620 ) must all be the same ( either all 520 or all 620 )

APPLE

First, locate your Model ID via the Apple Menu > About this Computer > More Info > Hardware

Second, from the System Profiler > select Memory to see the status of Slots, Size, Type, Speed

Or, confirm compatibility with MacTracker ( free download app ) and select your Mac > Memory

Many Color iMacs / PM G3 Blue & White Tower / many PM G4 Towers & Cube / many eMacs

WINDOWS

First, click the Windows button > Settings > System > About > Memory > Size, Type, Speed

Or, confirm your hardware with Speccy ( free download app ) and select RAM for details

Many Pentium II, Pentium III, and AMD Athlon, AMD Duron, AMD K6-III

SHOPPING WITH US

Combined shipping is calculated in your cart or a partial refund will be provided

Offers at 90% off – rounded to the nearest dollar – are accepted immediately

Orders placed by 4 pm M-F PST ( Sat by 11:30 am ) ship out the same day

Guaranteed to be good quality — and well secured in generic packaging

Feel free to contact us anytime, we're happy to answer your questions

Thank you