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What the 4ns and 3.6ns labels mean
The nanosecond figure is the memory chip’s rated access speed. A lower number represents a faster-rated chip. However, that rating is not the same thing as the clock configured on the graphics card.
For example, HEXUS reported that 4ns memory is specified for 500MHz DDR operation on its ABIT Siluro Ti 4200 64MB review card. That card ran a 250MHz core and 500MHz effective DDR memory clock. A board fitted with 3.6ns chips could still be configured below the chips’ theoretical rating, so the label alone does not prove the card’s operating speed.
Why a 128MB Ti 4200 cannot be identified by capacity
Contemporary reports document different assignments on different products. The same capacity can use different chips, and the same chip rating can appear on different capacities.
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- Cutting-Edge Pascal Architecture: The GTX 1050 Ti graphics card is built on the advanced Pascal architecture, delivering cutting-edge performance and efficiency with a 14nm manufacturing process. This ensures an optimal balance of power and capability for a superior computing experience.
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| Product or report | Capacity | Reported memory chips | Reported memory clock or frequency | What it shows |
|---|---|---|---|---|
| InnoVISION Tornado GeForce4 Ti 4200, Akiba PC Watch, 18 May 2002 | 64MB | 3.6ns | 512MHz effective, vendor-stated | 3.6ns was used on a 64MB version. |
| InnoVISION Tornado GeForce4 Ti 4200, Akiba PC Watch, 18 May 2002 | 128MB | 4ns | 480MHz effective, vendor-stated | 4ns was used on the 128MB version of this product. |
| ABIT Siluro Ti 4200 review, HEXUS, 2 July 2002 | 64MB | 4ns specified for 500MHz DDR | 500MHz DDR | A 4ns part can be run at the common 64MB clock. |
| Ti 4200-8X model reported by ZOL, 23 June 2003 | 64MB | Hynix 4ns, 128-bit DDR | 400MHz, as reported | This separate model used 4ns on its 64MB version. |
| Ti 4200-8X model reported by ZOL, 23 June 2003 | 128MB | 3.6ns, 128-bit DDR | 512MHz, as reported | This separate model used 3.6ns on its 128MB version. |
The InnoVISION and ZOL examples point in opposite directions. Therefore, statements such as “all 128MB cards have 4ns RAM” or “3.6ns always means the 128MB model” are incorrect.
How clock speeds varied between 64MB and 128MB cards
HEXUS described 128MB Ti 4200 cards as usually using a 444MHz memory clock, compared with 500MHz on 64MB cards. That was a review-era generalization, not a specification for every board.
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Akiba PC Watch recorded a different InnoVISION configuration: the vendor stated 512MHz effective memory for its 64MB card and 480MHz for its 128MB card. These figures illustrate why the configured clock must be recorded separately from the chip’s nanosecond rating.
The ZOL report on a Ti 4200-8X lists 400MHz for its 64MB version and 512MHz for its 128MB version. Because this is a different manufacturer-specific product report, it cannot be used to revise the InnoVISION figures or to define all Ti 4200-8X boards.
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How to identify the RAM on your card
- Read the board identity. Record the manufacturer, full model or SKU, PCB revision and whether the label says Ti 4200 or Ti 4200-8X. “GF T4200” is not a complete identification.
- Confirm capacity and memory bus details. Note whether the card has 64MB or 128MB and, where marked, the 128-bit DDR configuration.
- Inspect the memory chips. With the card powered off and removed, record the complete markings printed on each memory package. Do not infer the timing from capacity or heatsink appearance.
- Separate rating from configuration. Treat the chip’s 4ns or 3.6ns marking as a component rating. Record the card’s stated or measured effective memory clock as a separate value.
- Match evidence to the exact revision. A report for one manufacturer’s board, including a Ti 4200-8X, does not establish the specification of another board.
What difference should you expect in performance?
A 3.6ns rating indicates a faster-rated memory part than 4ns, but the sources available for these historical cards do not provide a controlled, card-for-card performance test that isolates the chip rating. Actual results also depend on the programmed memory clock, timings, core clock, cooling, BIOS and board design.
Consequently, do not choose between two unidentified cards from the nanosecond label alone. First establish each card’s actual clock and complete model. A 4ns card running at a well-supported clock may perform similarly to a 3.6ns card configured conservatively, while a higher clock can increase performance only if the board and memory remain stable.
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A practical comparison checklist
- Manufacturer and exact model or revision
- Ti 4200 versus Ti 4200-8X designation
- 64MB or 128MB capacity
- Memory chip maker and complete chip marking
- 4ns or 3.6ns rating printed or documented for that chip
- Configured effective memory clock
- Core clock, BIOS version and cooling when comparing stability or overclocking
Bottom line for a “GF T4200 128MB” listing
If a listing only says “GeForce4 Ti 4200 128MB,” its RAM timing is unconfirmed. Historical examples include a 128MB InnoVISION card with 4ns chips and a separately reported 128MB Ti 4200-8X model with 3.6ns chips. Ask for the exact manufacturer and model, a clear photograph of the memory markings, and the configured memory clock before treating either rating as the card’s specification.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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