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Whereas the HD 7770 comes very aggressively clocked at 1GHz, the HD 7750 operates at a more conservative 800MHz, which is still 14% higher than the HD 6750. The HD 7750 still features 1GB of GDDR5 memory clocked at 1125MHz using a tiny 128-bit bus, supplying a bandwidth of just 72GB/s.
The HD 7770 and HD 7750 differ greatly in their core configurations, as the latter features 512 SPUs, 32 TAUs and 16 ROPs. This is surprisingly modest and the HD 7750 has 29% less SPUs and 11% less TAUs than the HD 6750. The HD 6750 also produces slightly more memory bandwidth, so the HD 7750 will have to bring some significant efficiency gains if it's going to beat its predecessor.
The HD 7750 reference card has a single slot cooler that uses a low-profile heatsink and fan measuring just 1cm tall. The heatsink itself is 11cm long, 7.5cm wide and is cooled by a 65mm fan.
However, the HIS version we have uses a dual-slot cooler that stands 3cm tall and features a 9cm x 7.5cm heatsink. The HIS cooler will likely provide better results but its dual-slot design will make it less desirable for compact setups.
Unlike the HD 7770 and the HD 6750, the HD 7750 doesn't require additional power via external connectors, making it ideal for lower-end systems.
The HD 7750 doesn't have a Crossfire connector but a pair of cards can still take advantage of Crossfire technology. The I/O panel has a dual DL-DVI connector, a single HDMI 1.4a port and a DisplayPort 1.2 socket.
Again, all HD 7770 series cards support a max resolution of 2560x1600 on up to three monitors. With a multi-stream hub using the Mini DisplayPort 1.2 sockets, the HD 7750 can power up to four screens.
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