PNY

PNY Optima 4GB (2x2 GB) DDR2 800 MHz PC2-6400 Desktop DIMM Memory Module Dual Channel Kit - MD4096KD2-800

Name: PNY Optima 4GB (2x2 GB) DDR2 800 MHz PC2-6400 Desktop DIMM Memory Module Dual Channel Kit - MD4096KD2-800
Brand: PNY
SKU: B001ISJ964

Bottom line: The PNY Optima 4GB: Matched 2x2GB dual-channel kit, no mismatched-stick timing issues; main trade-off: DDR2 800MHz only, useless in any DDR3 or DDR4 desktop board.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-21

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ Matched 2x2GB dual-channel kit, no mismatched-stick timing issues
✓ Downclocks to PC2-5300 667MHz and PC2-4200 533MHz boards
✓ Lifetime warranty from PNY on a discontinued memory standard
✓ Free 24-hour technical support included with the kit

Cons

✗ DDR2 800MHz only, useless in any DDR3 or DDR4 desktop board
✗ 4GB total caps out 32-bit Windows usable RAM near 3.2GB
✗ Desktop DIMM form factor, will not fit SO-DIMM laptop slots
✗ Listing does not state CAS latency or voltage for tight-timing builds

SpecPicks Verdict

SpecPicks scored PNY Optima 4GB (2x2 GB) DDR2 800 MHz PC2-6400 Desktop DIMM Memory… using a rating × review-volume × price-fit model applied to published specs and reviews across the memory & ram category. PNY's memory & ram lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for memory & ram of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

Memory capacity upgrade provides improved system performance and responsiveness
Deliver all the productivity your PC has to offer with PNY Memory
Compatible with PC2-6400 (800 MHz), PC2-5300 (667 MHz), and PC2-4200 (533 MHz) systems
Helps prepare your PC for running Windows Vista
Easy installation, Free 24-hour Technical Support, and Lifetime Warranty!

Full Specifications

Brand	PNY
Voltage	1.65 volts
RAM Size	2 GB
Model Name	Optima
Unit Count	2 Count
Form Factor	Desktop
Memory Speed	800 MHz
Model Number	MD4096KD2-800
Compatibility	PC
Number of Pins	240
Mfr Part Number	MD4096KD2-800
Number of Items	1
Memory Generation	DDR2
Compatible Devices	Desktop
Data Transfer Rate	800 MHz
Memory Form Factor	DIMM
Additional Features	Lightweight
Computer Memory Size	2 GB
Warranty Description	Lifetime
RAM Memory Technology	DDR2

Ready to buy?

PNY Optima 4GB (2x2 GB) DDR2 800 MHz PC2-6400 Desktop DIMM Memory Module Dual Channel Kit - MD4096KD2-800 is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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