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Two green DDR2 SO-DIMM sticks, 200-pin, no heat spreader

Mushkin Enhanced

Mushkin Enhanced 976559A 4GB (2×2GB) DDR2 667 200-Pin SO-DIMM memory upgrade

SKU CH-CCCN-QVVB3 MPN 976559A

Dual-channel 4 GB DDR2 667 SO-DIMM kit with CL5 timing for pre-2008 Macs

  • Type200-Pin DDR2 SO-DIMM
  • Capacity4GB (2 x 2GB)
  • SpeedDDR2 667 (PC2 5300)
  • CAS Latency5
  • Timing5-5-5-15
  • Voltage1.8V
  • Dual-channel 4 GB kit boosts multitasking on pre-2008 Macs
  • DDR2-667 (PC2-5300) speed matches original system specs
  • CL5 5-5-5-15 timing keeps latency low for snappy response
  • 8 V operation runs cool without extra heat spreaders
  • 200-pin SO-DIMM form factor fits Apple notebook and iMac slots

Targeted Mac Upgrade

This 4 GB kit contains two 2 GB DDR2 667 SO-DIMM modules built for Apple systems released before October 2008. It delivers the maximum memory those iMacs, MacBooks and MacBook Pros can accept.

DDR2 667 Bandwidth Limit

The PC2 5300 interface caps transfer rates at 5 300 MB/s, so the bus cannot feed data faster than that ceiling. CAS latency 5 and 5-5-5-15 timings are fixed by the standard and cannot be tightened further.

4 GB Practical Ceiling

Four gigabytes lets the supported machines run multiple applications and larger files without hitting the memory wall. Beyond 4 GB the firmware refuses to recognise additional modules, so the upgrade stops here.

Highlights

  • Dual-channel 4 GB kit boosts multitasking on pre-2008 Macs
  • DDR2-667 (PC2-5300) speed matches original system specs
  • CL5 5-5-5-15 timing keeps latency low for snappy response
  • 8 V operation runs cool without extra heat spreaders
  • 200-pin SO-DIMM form factor fits Apple notebook and iMac slots

Specifications

BrandMushkin Enhanced
Model976559A
Type200-Pin DDR2 SO-DIMM
Capacity4GB (2 x 2GB)
SpeedDDR2 667 (PC2 5300)
CAS Latency5
Timing5-5-5-15
Voltage1.8V
Heat SpreaderNo
Shipping weight0.05 kg
Package size168 × 118 × 13 mm

Questions about this item

Should I pick the 4GB (2×2GB) kit or a single 4GB module?

The kit supplies two matched 2GB modules that run together in dual-channel mode, which the supported Apple models use for higher memory bandwidth.

What does the DDR2 667 (PC2 5300) rating deliver in my Mac?

It provides a 667 MT/s data rate and 5300 MB/s peak bandwidth at CAS 5 latency, matching the memory controller in pre-October 2008 iMacs, MacBooks and MacBook Pros.

How does the 200-pin SO-DIMM interface limit the upgrade?

The 200-pin DDR2 SO-DIMM form factor fits only the DDR2 slots in those early Intel Macs; later models use a different keying and will not accept these modules.

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