Ati Radeon HD 4750: PCI-E power connector required?
Rumors from allegedly authentic sources say that the Ati Radeon HD 4750 has an additional power connector and a TDP above 75 watt.
Authentic sources have confirmed that the Radeon HD 4750 needs an additional PCI-E power connector, says Fudzilla. The HD 4770 will also have the extra power. Both cards are said to be based on the 40 nanometer RV740 but the HD 4750 will be equipped with GDDR3 memory only while the HD 4770 is running with GDDR5.
Fudzilla's power calculations are based on the fact that the GDDR3 requires a higher voltage (1.8 to 2.0 volt) than the GDDR5 (1.5 volt). Furthermore lower clock speeds don't necessarily result in noticeably lower power consumption. AMD specifies the HD 4770's TDP with 80 watt.
The PCI-E slot delivers up to 75 watt, which is exceeded by the HD 4770. In order to be on the safe side AMD is said to give the HD 4750 an additional power connector, too.
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