diff --git a/dram.tester/README.md b/dram.tester/README.md
index 49bb79d..98c2fab 100644
--- a/dram.tester/README.md
+++ b/dram.tester/README.md
@@ -1,3 +1,6 @@
 # dram.tester 
-## Propose: Test of old C64 OLD DRAM Modules 4164
+## Propose: Test of old C64 OLD DRAM Modules 4164 and 4464
+### Dram 4164 1x 65536 bit (8 x 8 KB IC Chips / Long Board)
 Based on Git Project: https://github.com/randyrossi/arduino_dram4164_tester
+### Dram 4464 4x 65536 bit (2 x 32 KB IC Chips / Short Board)
+Based on Git Project: https://github.com/cloudree/DRAM_Tester
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