What desktop is better for gaming? Or other suggestions?

Between them the Alienware is better, especially for Starcraft 2.

The $699 Dell has a Core i3 2120 CPU and GeForce GT 545 graphics card.

The $698 Cyberpopwer has an FX-4100 CPU and GeForce GT 520 graphics card.

So the Dell is better in both departments.

SC2 isn't a first-person shooter where your in-game performance is determined mostly by your graphics card. It's a real-time strategy game where overall performance is mostly determined by your CPU. For those types of games, Intel's Core i3/i5/i7 processors perform much better than AMD processors (of which the FX-4100 is among the weakest for gaming). Note that Starcraft 2 doesn't use more than 2 cores, so the FX-4100 being a quad-core doesn't help at all.

http://www.pcgameshardware.com/aid,766589/Starcraf...

Here's a direct comparison, SC2 is the 5th game shown:

http://www.xbitlabs.com/articles/cpu/display/amd-f...

The Alienware might run into overheating issues because of it's form factor- I'm not sure how good the cooling is. And I'm definitely not a fan of their proprietary external power supplies. A better approach is upgrading a low-cost regular tower desktop and upgrading it. For example, take either of these:

http://www.bestbuy.ca/en-CA/product/acer-acer-aspi...

http://www.bestbuy.ca/en-CA/product/hewlett-packar...

Then add a better graphics card. In the case of the HP, the lower price means you could install a better power supply along with a substantially higher-end card.

This is a good addition for the Acer (the factory psu can't handle anything better):

http://www.newegg.ca/Product/Product.aspx?Item=N82...

With the HP, upgrade with these:

http://www.newegg.ca/Product/Product.aspx?Item=N82...

http://www.newegg.ca/Product/Product.aspx?Item=N82...

And you'd have a VASTLY more powerful gaming system. Many of the benefits of the GTX 460 wouldn't really be visible in Starcraft 2, but would really show in games like Skyrim, SWTOR, Crysis 2 and BF3.

http://www.tomshardware.com/reviews/radeon-hd-6790...

The simplest option is buying this:

http://www.newegg.ca/Product/Product.aspx?Item=N82...

But that prebuilt unit might be slower in SC2 than the X51. Even though it's got the blazing fast CPU, the included Radeon HD is a cheaper GDDR3 model (which is slower in SC2 than a GeForce GT 440 or GT 545- which are identical in performance).

http://www.digitalversus.com/recycling-nvidia-way-...

But being a regular tower it wouldn't have any heat problems. And unlike the Alienware, if you ever need to replace failed components that's easy and cheap because it's a standard ATX unit. If you don't mind playing on medium settings, it would probably be the best. But on higher detail settings the Radeon HD 6670 would hold you back.

If you don't mind doing upgrades, I recommend the HP with a new GPU+PSU. The fps difference between a Core i3 2120 and Core i5 2320 is dwarfed by the difference between a GeForce GT 440 and GTX 460.

Good luck!

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I would defo go for the Alienware to be honest. Alienware is the best for gaming and looks good to. The power pc is ok but go for the alienware