new Infineon memory for 7900GT's

[sluggo]

I saw an early report from someone who had received their replacement EVGA 7900GT. Apparently they're using the Infineon HYB18H256321AF (700MHz, 2.0V). The first thing he noticed was that he was running about 10C cooler. Looking over the Infineon data sheet I can see why. Compared to Samsung's 2.0V part, burst transfer currents on the Infineon part are about 60% of the Samsung part. Refresh currents are much lower as well.

Comparing the Infineon part to the Samsung part that's actually loaded on the boards (which is an 1.8V part) is complaring apples and oranges, but the 1.8V part's operating currents were even higher.

I never liked the fact that the board vendors were running 1.8V memory at 2.0V. Here's hoping that the cooler running Infineon parts will mean better OC'ing and better stability.

[t024484]

I saw an early report from someone who had received their replacement EVGA 7900GT. Apparently they're using the Infineon HYB18H256321AF (700MHz, 2.0V). The first thing he noticed was that he was running about 10C cooler. Looking over the Infineon data sheet I can see why. Compared to Samsung's 2.0V part, burst transfer currents on the Infineon part are about 60% of the Samsung part. Refresh currents are much lower as well.

Comparing the Infineon part to the Samsung part that's actually loaded on the boards (which is an 1.8V part) is complaring apples and oranges, but the 1.8V part's operating currents were even higher.

I never liked the fact that the board vendors were running 1.8V memory at 2.0V. Here's hoping that the cooler running Infineon parts will mean better OC'ing and better stability.
What exactly was 10C cooler ? If it is the temp of the memory chips, I am not impressed, because the memory chips hardly raise their temp when properly cooled.
If it is the mosfet of the Vmem regulator, 10C is quite welcome and could prevent the need to place a separate heatsink.

I am looking forward to see any 1:1 comparative results between a Samsung and an Infineon board. I suspect that the Infineon will be somewhat slower.

Of course the most important question is, are all the problems solved now with the 7900GT ?? We will experience this in the near future.

[sluggo]

In a few days I'll have one of the new boards and one of the old boards. I'll take some measurements (thermocouple) and post my findings.