Macintosh 68-pin VRAM SIMMs

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

For this platform (bus/interface): Requires a Macintosh with 68-pin VRAM SIMM sockets. The computer determines usable capacity and required module count. Match every module in a bank instead of mixing 256 KB and 512 KB parts.

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.

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

For this platform (bus/interface): Requires a host, dock, or video card with compatible 68-pin VRAM SIMM sockets. Check the maker's matrix for capacity, required module count, and timing: some systems use only 256 KB of a 512 KB module and some require modules in pairs. The fast 70/60 ns listing explicitly warns against using that variant in the Macintosh LC or LC II because it may cause display glitches; use the seller's blue 70 ns variant instead.

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.

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

For this platform (bus/interface): For 68K Macs with a 68-pin VRAM SIMM socket. The maker lists LC, LC II, LC III, LC 475, LC 520, LC 550, LC 575, Color Classic and II, Quadra 610, 650, 700, 800, 900 and 950, Centris 610 and 650, IIvi, and IIvx as representative compatible models.

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.

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

For this platform (bus/interface): Requires a Macintosh that can address a 512 KB 68-pin VRAM SIMM. Do not assume that every system accepting a 256 KB module can use this capacity.

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.