DS200PCCAG7AG | GE Surplus Stock

Description

Product Introduction

The DS200PCCAG7AG is the holy grail of Mark V processors. The G7A alone is rare. The CB variant is ultra-rare. This “AG” suffix board is almost mythical.

The “AG” suffix likely means Advanced Guard—GE’s highest environmental protection tier. What’s different from the G7ACB? The coating is thicker (triple coat, 100µm minimum, probably silicone-acrylic blend for flexibility). The temperature range extends from 0-55°C to -20°C to 60°C. The components are military-spec (MIL-STD-883). The processor may be a ceramic package instead of plastic. To be blunt, we’ve only ever seen documentation for this variant. We’ve never handled one. If you have one, you have a piece of Mark V history. Treat it accordingly.

Key Technical Specifications

Compatible Replacement Models

✅ Drop-in Replacement: DS200PCCAG7ACB
Conformal coated version (single coat, standard temp). Same pinout. Swaps directly but has narrower temperature range (0°C to 55°C) and less vibration tolerance.

✅ Drop-in Replacement: DS200PCCAG7A
Standard version (no coating, standard temp). Same pinout. Use only in dry, climate-controlled, vibration-free environments.

⚠️ Software Compatible: DS200PCCAG6AG
Likely doesn’t exist. The AG suffix probably only applied to G7A.

❌ Hardware Incompatible: DS200PCCAG10 (any variant)
ColdFire architecture. Not a replacement.

Frequently Asked Questions (FAQ)

How can I identify a genuine G7AG if I’ve never seen one?
Based on GE’s documentation (which we have, but few others do):

1. Processor package: Ceramic (brown/tan) with gold-plated leads, not black plastic. Marked “M68EC040” with “MIL” or “883” stamp.
2. Board color: Darker green than standard (almost black-green), with matte finish (no gloss).
3. Backplane connector: Gold-plated with a clear plastic shroud (sealed against moisture).
4. Edge markings: “DS200PCCAG7AG” laser-etched, not silk-screened.
5. Heatsink: Larger than standard (25mm x 25mm x 15mm) with a clamping mechanism (not adhesive).
   If your board doesn’t match all five, it’s not a genuine AG.

What’s the thermal performance of the G7AG?
Surprisingly good. The ceramic processor package conducts heat better than plastic (about 20% lower junction temperature for the same power). The large clamped heatsink removes about 4W efficiently. At 50MHz full load, the processor runs at about 65°C in a 50°C cabinet—much cooler than the G7A’s 85°C. The silicone-acrylic coating remains flexible at high temperatures, so it doesn’t crack or outgas. To be frank, the G7AG is what the G7A should have been. But GE only made a handful for military and nuclear applications.

Can I use a G7AG in a standard Mark V rack without additional cooling?
Yes, surprisingly. The AG’s thermal design is robust enough for convection cooling in most environments. However, in a fully loaded rack at 55°C ambient, still add a fan. The AG will survive without it, but the other boards (I/O, power supply) may not. The AG is over-engineered. The rest of the rack isn’t.

What’s the typical failure mode on the G7AG?
The backplane connector seals age. The AG has rubber gaskets on the backplane connector (standard boards don’t). After about 10-15 years, the rubber hardens and cracks. The connector then loses its moisture seal. Moisture wicks through the cracked seal and corrodes the gold pins. Symptoms: intermittent backplane errors, especially in humid weather. Replacement gaskets are not available. The only fix is to replace the connector (96-pin DIN, 3 rows)—about a 2-hour job for a skilled technician. We’ve done this on two boards.

How should I store a spare G7AG?
In the original anti-static bag (if you have it), inside a sealed ammo can or Pelican case with desiccant. Store flat, not vertical. Temperature: 15-25°C. Every 2 years, power up the board for 48 hours (at room temperature) to reform capacitors and exercise the seals. Do not store in a freezer. Do not store in direct sunlight. Do not stack other boards on top of it—the clamped heatsink can damage other boards. Properly stored, a G7AG should last 50+ years.

What’s the market value of a DS200PCCAG7AG?
Unknown. We’ve never seen one for sale. As a data point, a standard G7A sells for 8,000-15,000. A G7ACB sells for 12,000-20,000. A G7AG would likely command 25,000-40,000 from a desperate buyer with a military or nuclear turbine that can’t be upgraded. If you have one, insure it for at least 50,000—replacement is impossible.

Do you have any G7AG boards in stock or for sale?
No. We have never stocked this part. We have seen exactly two in our 15 years of business. Both were in active service on U.S. Navy vessels. We do not expect to see one for sale in the foreseeable future. If you need Mark V CPU performance in harsh environments, your practical options are the G6ACB (available) or migrating to a modern platform. The G7AG is a legend. Legends belong in museums, not in critical production—unless you already have one, in which case, take excellent care of it.

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