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Leadtek WinFast A250 Ultra TD
By CPU-zilla
Category : Graphics
Published by Jimmy Tang on Wednesday, 17th April, 2002
Rating : 4.5 out of 5 stars  
Price : SGD790

The Card

The Leadtek A250 Ultra TD came with the same kind of Samsung DDR memory that was used in other GeForce4 Ti 4600 cards. The 128Mbit DDR memory is specified to run at 650MHz and if Samsung's quality is consistent, it should have no problem hitting 700MHz DDR at all. The placement of the chips are the same as NVIDIA's reference board and it also uses the same wBGA packaging. Since Samsung is the only vendor supplying DDR SDRAM graphics memory for Ti 4600 cards, you can guess by now how much Samsung is earning out of this.

The same memory chip as NVIDIA's reference board.

As I've mentioned earlier, the card is sandwiched in between two large heatsinks that keeps both the memory and GPU cool. Removing the heatsink, we can see that the extruded heatsink block is carefully machined to fit the card. Certain large components have either been moved or grooves have been cut on the heatsink to fit the card. This is to ensure that there are no obstacles obstructing the heatsink from performing its primary function. Instead of using heat conductive glue, Leadtek has chosen to smear generous amounts of heat conductive paste on the critical components to give it better contact with the heatsink. For those who want to enhance heat conductivity, some Arctic Silver paste would do wonders here.

The heatsink is precisely machined to keep itself in contact with the memory and GPU.

There's generous amount of thermal paste on the GPU. Fill this up with high quality thermal paste and you're on your way to greater overclocking success.

The heatsink at the back removed.

You'll find a block of thermal contact for the back heatsink - its purpose is to draw heat from the GPU from the back.

Right on top of the main heatsink, you'll find two very prominent looking fans. Decorated with shiny stainless steel grills, the fans also feature a very simple sponge air filter. Placed in between the grill and the fan, it should help block out dust which could degrade the efficiency of the heatsink. But we think that the sponge will also lower the amount of air delivered to the heatsink as it would definitely reduce the flow rate considering that it's not a very powerful fan. In addition, if you're the lazy kid on the block, prolonged use without cleaning the air filter would be disastrous as dust might ultimately block all airflow and that's worse than dust contamination. My advise is, pull out the filter if you don't intend to clean frequently.

The fan grill and sponge filter.

The fan can be removed from the heatsink. It's rated at 12V DC, 0.15A.

Taking out the filter is relatively simple. There are four screws holding the grill and the fan on the heatsink. Unscrewing them would help you remove the fan, grill and air filter for cleaning. Do this on a regular basis if you intend to keep your card running in the most optimal state. However, we doubt the heatsink could take the regular screwing and unscrewing. Since aluminium is relatively soft, the screw threads on the heatsink would easily worn out. When that happens, changing to a larger screw will help, but how many times can you do that?

The heatsink without the fan. Anyone with weird ideas for a more powerful fan here?

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