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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

  • Total capacity4 GB (2 × 2 GB)
  • Rated speedDDR2 667 (PC2 5300)
  • CAS latency5
  • Memory timings5-5-5-15
  • Rated voltage1.8 V
  • Product type200-Pin DDR2 SO-DIMM
  • 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.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 87% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB (2 × 2 GB)
Lower than about 90% of the 20,941 comparable items (median 32 GB).
CAS latency 5
Lower than about 97% of the 483 comparable items (median 22).
Price per GB $6.75 per GB
Cheaper than about 59% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameMushkin Enhanced
Model name976559A
Total capacity4 GB (2 × 2 GB)
Product type200-Pin DDR2 SO-DIMM
Performance
Rated speedDDR2 667 (PC2 5300)
Memory
CAS latency5
Memory timings5-5-5-15
Heat spreaderNo
Power
Rated voltage1.8 V
Size & build
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.

More in Model-Specific Memory Upgrades

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