I'm not sure how much performance difference (outside Sandra and other memory intensive benchmarks) dual versus single channel makes. I think the bigger performance hit on single channel is when using the IGP. If using a discrete video card, the real-world performance hit probably wouldn't be as bad as we think. Of course someone feel free to post "real-world" benchmarks to prove me wrong. Would be interesting to see.
Here's one review I found:
http://www.pcstats.com/article...?articleid=2211&page=5
It compares versus various P35, x38 and 680i motherboards, and does quite well. Win some, lose some, midpack some. BTW the review board uses the GF7150 chipset. The 7050, 7100 and 7150 differ mostly in their IGP and RAID features.
SiSoft Sandra XII
Memory Bandwidth:
Gigabyte GA-X38-DQ6 (X38 333/1066) 6679 6729
Asus BLITZ Formula (P35 333/1066) 6770 6807
Foxconn MARS (P35 333/1066) 6573 6450
MSI P6N Diamond (NF 680i 333/1066) 6672 6655
Biostar TF7150U-M7 (GF 7150 333/1066) 5126 5127
So, not quite half the bandwidth as feared. Latencies were a hair higher than other boards as well.
Another test was SuperPi, where 1 million digits was the same across all boards probably because it fit within cache. 8 million digits was the slowest on the Geforce7150 board. Interestingly the second slowest was the Nforce 680i, so the GF7000 series might be hampered to begin with for this test seeing as it is a possibility (though small sample size) that Nvidia chipsets are slow on this test.
PCMark Vantage severely docks the chipset for memory scores, even more than Sandra! It also loses HUGE in gaming and overall, though it was competitive in everything else. Hmmm, maybe "overall" means 40% gaming, 40% memory, 20% everything else?
In 3DMark the GF7150 is tested with both IGP and discrete. It does quite well, near par with the other boards regardless that PCMark Vantage docked it severely in gaming.
It also does quite well in Quake 4 and FEAR. Only hit was in Quake 4 "ultra quality" setting, but still wasn't too bad at around 170fps versus 191fps for a 680i with the same video card.
All in all, not too terrible a showing for a single channel memory board.