Power Consumption
Each of the cards we tested treats power management a little differently. The following table illustrates the idle/load clock speeds observed for each board:
| Idle Clocks (GPU/Memory) | Load Clocks (GPU/Memory) | |
|---|---|---|
| Radeon HD 4850 | 160/500 | 625/993 |
| Radeon HD 4830 | 500/750 | 575/900 |
| Radeon HD 4770 | 250/800 | 750/800 |
| Radeon HD 4670 | 165/250 | 750/1100 |
| GeForce GTS 250 | 738/1100 | 738/1100 |
At first, it seems strange that the 640-shader Radeon HD 4830 would idle at the same power consumption as the Radeon HD 4850. However, the 4830 is being run at significantly higher idle clocks. Under load, the faster HD 4850 widens the gap and uses the most power in this comparison.
The Radeon HD 4770 scales back idle power consumption to 152W (total consumption from the wall socket), just 4W less than the 55 nm RV770 LE running 250 MHz faster. With a load applied, however, the new ATI card is 18W under the Radeon HD 4830 and 29W under Nvidia’s GeForce GTS 250. In fact, the card’s closest competitor is the mainstream Radeon HD 4670, which uses 19W less under full load.
What a shame they could not shave few watts off power consumtion to use it without PCIe power connector. Or at least made the card to work without it and PCIe power connection as optional when You overclock. Hopefully some of the board partners will do that.
Pretty decent review.
Question on Test Setup: what are the GPU/GDDR clocks? Reference?
This just goes to show that AMD is more than CPU's. Looks like you get a lot of card for your money here, and it's not a hand-me-down technology, either; it's cutting-edge.
Here is a rivetuner edit that works. Just change RV770 = 9440h-9443h,944Ch into RV770 = 9440h-9443h,944Ch,94B3h in Rivatuner.cfg
I got mine to 888/1000
http://gpuz.techpowerup.com/09/04/29/5ka.png
for 76 quids is unbelievable