Link to the Project in GitHub: https://github.com/tops4u/Ram-Tester

This tester can work with the following DRAMs

• 4164 (64k x 1)
• 4416 (16k x 4)
• 4464 (64k x 4)
• 41256 (256k x 1)
• 514256 (256k x 4)
• 4110000 (1M x 1)
• 514400 (1M x 4)

It is probably the most complete tester, and to my knowledge one of the fastest Arduino Based Testers. No Ram Chip takes more than 10sec to completely test. For more details check the Project on Github.

BOM

• Y1 1x 16 MHz Quartz 
• C1/C6/C7 3x 100nF Capacitor 
• C2/C3 2x 15pf Capacitor 
• C5 10µF Elko
• R3-R5 3x 1M Resistor
• R2 1x 1k Resistor
• R1 1x 150R Resistor
• R6 1x 330R Resistor
• R7-R24 47R Resistor
• Q1, Q2 2N7000 TO92 N-FET
• U1 ATMEGA 328 DIP and DIP Socket 28 Pin - Narrow (you can also solder the ATMEGA directly to the board)
• U2 1x ZIF Socket / DIP Socket 20 Pin 
• D1 1x BiColor LED 5mm (Red/Green) Common Center Anode 
• SW1 1x 3 way Dip-Switch AliExpress
• SW2 Pushbutton AliExpress
• J1 MicroUSB (or any power Connector having 2.54mm Spacing 
• F1 Resetable Fuse 500mA 

If you want to use ICSP:

• ICSP 1x PinHeader 2x3 

If you want to use the ZIP Socket

• U3 2x 10Pin Pin Header Female 

If you want a Display

• 0.96" OLED with SSD1306 or 1315 I2C Variant UniColor