Doesn't sound normal, but I suspect I know what the problem is.
Processeur 1x VIA® Nano® U2250
I'm not positive, because it's in French, and the supplied link is not loading for me, but that's a processor for notebooks (low-end laptops).
Check some benchmarks here, and this page I found through Google with some product information.
The VIA Nano U2250 is a power efficient processor for small and light
laptops / netbooks. IT is clocked from 1.3 GHz upwards (in the Samsung
NC20 1.5 GHz). It is the counterpart to the Intel Atom processors and
slightly faster than a 1.6 GHz Atom (at 1.5 GHz).
The power consumption of 10 Watt is higher than the Atom counterparts,
but VIA states a low idle power consumption of 200mW.
I'm really surprised it's only half as slow as what you had before. But now you know why they price for a dedicated "server" is only 10 Euros, at least.
Since I use Dell servers as often as I can, and this intrigued me, I looked into it a bit, and what you actually have is a dedicated Dell XS11-VX8 "Fortuna" server. It's a mini-server; a type of "blade" server that is particularly focused on blade density and power efficiency, and marketed at large datacenters. You can get twice as many of these in the same rack space as with a typical HP or IBM bladecenter, and at [significantly] less than 10% of the power draw. They launched back in 2009, at a list price of $399 each. In contrast, to, for example, the 12 HP blades I installed recently, that listed at ~$8500 each.
So, yes, you did get a server, and a Dell server at that (though I notice their link to Dell doesn't actually go to the product page), but you got a very low performance one whose primary purpose in life is to save large datacenters (and your hosting company) lots of money on very large scale blade server deployments.