Different between these two boards?

[The Last MeMe]

The model numbers and stuff are different but I don't see any thing different in the spec list.

http://m.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=667674&CatId=7246

http://m.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=761364&CatId=7246

[Samdb]

Links are broken.

[EChondo]

One is a UD3, the other is a UD5.

 

The difference could be a number of things from better voltage regulation to better heatsinks.

 

UD stands for "Ultra-Durable", so higher, the better. Also you can see the PCI-E slots are different.

Since you're on mobile, when you have the chance, look at Newegg's page, there you can see the real differences.

UD3: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128514

UD5: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128509

 

Links are broken.

Links are in mobile form, I can see them fine though.

[Andi]

the UD5 is better and cheaper..what's to think about? :D

[rainbrodash666]

ud5 has more sata, more pcie x16, has better vrm and northbridge cooling and probably has better vrm  and will have better overclocking capabilities.

[Lazmarr]

The UD5 has better VRMs and better heatsinks and cooling solutions for the VRMs.

[LogicalDrm]

Between UD3-5 there are minor changes in connectivity, on board buttons and utilities. I think major difference is color scheme. UD3 is blue, UD4 is red and UD5 is yellow. All of course black-grey otherwise. If you'r planning on buy I'd suggest to think is there some features you want to pay more for.