A-Tech
A-Tech 4GB (2x2GB) DDR2 800MHz SODIMM PC2-6400 1.8V CL6 200-Pin Non-ECC Unbuffered Laptop RAM Memory Upgrade Kit
Bottom line: The A-Tech 4GB (2x2GB) DDR2 800MHz SODIMM PC2-6400 1.8V CL6 200-Pin ($53.11 on Amazon as of 2026-10-06): Matched 2x2GB pair fills two slots in one install; main trade-off: DDR2 only: won't fit DDR3, DDR4 or DDR5 laptop slots.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Matched 2x2GB pair fills two slots in one install
- ✓ DDR2 800MHz PC2-6400 at CL6 suits most late DDR2 laptops
- ✓ Standard 1.8V, 200-pin SODIMM for laptops and all-in-ones
- ✓ Lifetime warranty from A-Tech on all orders
- ✓ Free US-based tech support before, during and after purchase
Cons
- ✗ DDR2 only: won't fit DDR3, DDR4 or DDR5 laptop slots
- ✗ 4GB total is tight for modern operating systems and browsers
- ✗ Compatibility covers select models; you must verify your system
- ✗ Non-ECC, so not for systems that require ECC memory
Manufacturer description
Give an aging laptop more headroom with the A-Tech 4GB (2x2GB) DDR2 800MHz SODIMM laptop RAM upgrade kit. It has two 2GB PC2-6400 modules, each a 200-pin, 1.8V, CL6, non-ECC unbuffered stick. Those are the specs most Core 2-era notebooks, all-in-ones and compact systems expect. Installing a matched pair fills two slots in one step. If your machine is running on 1GB or 2GB, the extra memory helps with multitasking, browser tabs and legacy apps. Retro PC builders and people keeping old hardware running can also use it to restore a period-correct laptop without hunting down used modules of…
SpecPicks Verdict
SpecPicks scored A-Tech 4GB (2x2GB) DDR2 800MHz SODIMM PC2-6400 1.8V CL6 200-Pin… using a rating × review-volume × price-fit model applied to published specs and reviews across the memory & ram category. A-Tech'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.
Frequently Asked Questions
Will this RAM work in a laptop that uses DDR3 memory?
No. This kit is DDR2 PC2-6400, 200-pin SODIMM at 1.8V. DDR3 and newer laptop slots use different modules and won't accept it. Check your laptop's memory spec before ordering.
Is this kit compatible with my Dell, HP, Lenovo or Apple laptop?
A-Tech designed it for select models from Acer, Alienware, Apple, ASUS, Dell, Fujitsu, Gateway, HP, Lenovo, MSI, Samsung, Sony, Toshiba and others. Confirm that your model uses DDR2 SODIMM and supports 2GB per slot.
What are the exact specs of each module?
Each of the two modules is 2GB of DDR2 800MHz (PC2-6400) at CL6 and 1.8V. It is a 200-pin, non-ECC, unbuffered SODIMM, for 4GB total.
Can I use this RAM in a NAS or mini server?
A-Tech lists select QNAP, Synology and Supermicro models among its targets. The modules are non-ECC unbuffered, so confirm that your device takes non-ECC DDR2 SODIMM before you install them.
What warranty and support does A-Tech offer?
A-Tech gives a lifetime warranty on all orders. It also offers free US-based tech support before, during and after your purchase.
Key Features
- Memory Size: 4GB (2x 2GB Modules) | Memory Type: DDR2 SODIMM Memory RAM for Laptop, Notebook, & All-in-One Computers
- Speed: DDR2 800MHz PC2-6400 | ECC Type: Non-ECC Unbuffered | Pin Count: 200-Pin | Voltage: 1.8V
- Designed for Select (not limited to) Acer, Alienware, Apple, ASRock, ASUS, Dell, DFI, Fujitsu, Gateway, Gigabyte, HP, HP Compaq, Intel, Lenovo, LG, MSI, Panasonic, QNAP, Samsung, Sony, Supermicro, Synology & Toshiba Laptop, Notebook, & All-in-One Computer Models
- All A-Tech modules undergo stringent quality assurance testing to ensure high performance and reliability
- A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase
Full Specifications
| Brand | A-Tech |
|---|---|
| Speed | DDR2 800MHz PC2-6400 | ECC Type: Non-ECC Unbuffered | Pin Count: 200-Pin | Voltage: 1.8V |
| Voltage | 1.8 Volts |
| RAM Size | 4 GB |
| Form Factor | 200-Pin |
| Memory Size | 4GB (2x 2GB Modules) | Memory Type: DDR2 SODIMM Memory RAM for Laptop, Notebook, & All-in-One Computers |
| Memory Speed | 800 MHz |
| Model Number | CT2KIT25664AC800 |
| Number of Pins | 200 |
| Mfr Part Number | CT2KIT25664AC800 |
| Memory Generation | DDR2 |
| Compatible Devices | Laptop |
| Data Transfer Rate | 800 MHz |
| Memory Form Factor | SODIMM |
| Additional Features | High Performance |
| Computer Memory Size | 4 GB |
| Warranty Description | Limited Lifetime Warranty Covering Defects In Materials And Workmanship |
| RAM Memory Technology | DDR2 |
| Column Address Strobe Latency | 6 |
Ready to buy?
A-Tech 4GB (2x2GB) DDR2 800MHz SODIMM PC2-6400 1.8V CL6 200-Pin Non-ECC Unbuffered Laptop RAM Memory Upgrade Kit 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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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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