Operation confirmed (images available) DDR3-1600 4GB x 4 pieces (16GB total)

CFD Panram W3U1600HQ-4G DDR3-1600 4GB x 4 (Total 16GB)
This is 2 pairs of 2 sticks each, with matching lot numbers within each pair.

Test Bench (Case-less Bench Stand)
Motherboard: GIGABYTE Z77M-D3H
CPU: Intel Core i3-3220

Tested at stock speeds and overclocked without issues.

Previously used in my main PC with an i7-3770 at 1866MHz overclocked.
With 4 sticks from the DDR3 era, using mixed lot numbers could lead to instability even at stock speeds, let alone 1866MHz. Therefore, using them as dual pairs with matching lot numbers should reduce errors, but this depends on your specific setup.

SPD information is included. Based on the lot numbers, it seemed possible to run at 1866MHz, which is why I also tested with the i3-3220. Cinebench also ran without issues.

Although tested for functionality, this is a precision electronic component whose performance can be affected by compatibility and environment. Therefore, we cannot guarantee operation after arrival or accept returns. Please purchase only if you understand the nature of custom-built PCs.

After cleaning the main unit and connectors, and due to the nature of precision equipment, each pair of 2 sticks with the same lot number will be individually wrapped in anti-static sheets and cushioning material, then placed in a thick paper envelope for immediate shipment via Yu-Packet Post Mini.

*As stated in my profile, I may not be able to accommodate all requests. We kindly ask that you review the description and my profile before considering a purchase.