A-Tech 4GB KIT 2x 2GB Tyan Thunder h1000E S3970G2NR h2000M S3992 h2000M S3992-E h2000M S3992G3NR-RS i7522 S5362 i7522R S5362-1U i7525 S2676 DIMM DDR2 ECC Registered 5300 667MHz Single Rank RAM Memory 4GB KIT (2 x 2GB) DIMM DDR2 ECC Registered PC2-5300 667MHz Single Rank RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Tyan Thunder Series. (See Compatibility List Below)