Few days ago we have a small comparison of power module’s of 8800GTS and 8800GT. Actually they are using the same PCB design, same Qimonda HYB18H512321BF-10 memory chips. The only difference is their frequency, numbers of SP and their power module(8800GT: 2 phase; 8800GTS 3 phase).

So does the same spec brings the same power consumption to both card? We will see:

Test bed：

　　Intel Core 2 Quad Q6600 oc 333MHz*9=3.00GHz
　　Asus Striker Extreme |EIST & C1E disabled
　　GSKILL F2-6400PHU2-2GBHZ (2GB DDR2-800 4-4-4-10 1T)
　　Tuniq Tower 120
　　WestDigital WD3200YS 320GB
　　Acbel R8 607W
　　Windows Vista 32bit

We using Seasonic PowerAngle to record the Whole platform’s power consumption. The whole test bed is unchanged in the whole test.
The results was taken from two way:1.idle in vista for 15minute
2.using ATI Tool’s 3D view to simulate graphic card’s fullload.

The gap is quite huge, especially in load mode. 29W is enough for driving a entry level graphic card.

We mentioned their difference is frequency, SP number and power module. If we OC 8800GT to the 8800GTS’ same frequency than what will happen? Will the gap be smaller?

We OCed G92-8800GT to 650/1625/972MHz(core/shader/mem) using Rivatuner. And here is the result.

So the gap is somehow smaller. But as you can see, still 20W+. So what’s going on with 8800GTS? With the extra SP the 3D performance did not go up but sucking more power? By the way, power consumption of 8800GTS’ cooler is only about one watt more than 8800GT’s original cooler.

We will continue searching for the final answer so please keep tuned.