Tag: 68 pin vram

4 matching upgrades

Showing 4 products.

StatusProductWhat it doesCompatibilityLinks
Build itChecked Jul 24, 2026GW4405A 512 KB VRAM SIMMby Garrett's Workshop
512kb68 pin vramvramvideo memory70ns80nsopen hardwarediy

Open 512 KB 68-pin Macintosh VRAM SIMM built with new 80 ns or faster memory.

The assembled Tindie module was out of stock on 2026-07-24 and had been sold out since May 5, 2024. Schematics and board files remain available for commercial and noncommercial use. A 512 KB module can replace a 256 KB module where the connector is compatible, but that machine will use only 256 KB; never mix capacities within one VRAM bank.

Sources
  • Macintosh 68-pin VRAM SIMMs Bus/interface
GW4405A product pageOpen VRAM SIMM designGarrett's Workshop documentation
AvailableChecked Jul 27, 2026Jurassic Computing 512 KB VRAM SIMMsby Jurassic Computing
512kb68 pin vramvramvideo memory60ns70nsassembled

Newly made, assembled 512 KB 68-pin Macintosh VRAM SIMMs in standard and low-latency 70 ns or 70/60 ns variants.

On 2026-07-27, the blue 70 ns module was $29 with one left, while the fast 70/60 ns page was listed at $29 with a latency selector and no out-of-stock marker. The original $25 PurpleRAM version had been sold out since December 16, 2024. The seller said economy shipping from France to the United States was suspended and exposed only an expedited $50 route on the blue listing.

Sources
  • Macintosh 68-pin VRAM SIMMs Bus/interface
Buy blue 70 ns 512 KB VRAM SIMMBuy fast 70/60 ns 512 KB VRAM SIMMOriginal PurpleRAM 512 KB VRAM SIMM
AvailableChecked Jul 24, 2026SMC 256 KB VRAM SIMMby Infinity Products
68 pin vramvrammemory expansionvideo memory

Two-chip 256 KB 68-pin VRAM SIMM for 68K Macintosh models that cannot use, or do not need, a 512 KB module.

The current storefront listed individual 256 KB modules without an out-of-stock marker on 2026-07-24. Chip speed can vary from 60 ns through 80 ns by production lot.

Sources
  • Macintosh 68-pin VRAM SIMMs Bus/interface
  • Macintosh LC Exact model
  • Macintosh LC II Exact model
  • Macintosh LC 475 Exact model
  • Macintosh LC 575 Exact model
  • Macintosh Color Classic Exact model
  • Macintosh Quadra 650 Exact model
  • Macintosh Quadra 800 Exact model
  • Macintosh Quadra 950 Exact model
SMC 256 KB VRAM SIMM product page
AvailableChecked Jul 24, 2026SMC 512 KB VRAM SIMMby Infinity Products
512kb68 pin vramvrammemory expansionvideo memoryoverclocking

512 KB 68-pin Macintosh VRAM module sold in a premium 60 ns design and a limited early four-chip design.

The premium 60 ns module and the final red clearance modules were listed on 2026-07-24. The purple early-production modules were sold out with no planned rerun. Modules are sold individually; systems with two sockets require two purchases.

Sources
  • Macintosh 68-pin VRAM SIMMs Bus/interface
  • Macintosh LC Exact model
  • Macintosh LC II Exact model
  • Macintosh LC 475 Exact model
  • Macintosh LC 575 Exact model
  • Macintosh Quadra 650 Exact model
  • Macintosh Quadra 800 Exact model
  • Macintosh Quadra 840AV Exact model
  • Macintosh Quadra 950 Exact model
Premium 60 ns moduleEarly four-chip module