Alienware X51 review

WHAT IS THE ALIENWARE X51?

Alienware is one of the strongest global brands of gaming PCs, with a range that now stretches to multiple mobile and desktop form factors. While many gaming PCs come in giant towers, the X51 packs a top-of-the-line CPU and mid-range graphics into a desktop chassis that’s not much bigger than a current-generation console.
The X51 line has been around for a while – Trusted covered the previous version back in September 2014. This update is really more about introducing up-to-date technology and a spec boost than a radical design overhaul. Our original criticisms of the previous version focused on its specification, which wasn’t capable of gaming beyond 1080p resolution, lacked an SSD and lead to some toasty internal temperatures. Have these issues been resolved with new-generation hardware?

ALIENWARE X51 – DESIGN

The X51 is all about squeezing a capable gaming PC into a console-sized chassis. As with previous versions, its dimensions make it only slightly larger than a PS4 or Xbox One, with a width of 9mm and a height of 343mm (in vertical orientation).
If you’ve worked in an office at any point over the last decade, there’s a high probability you’ve used one of Dell’s slim corporate desktop systems, and the X51 borrows heavily from them. It has two sets of rubber feet for both vertical and horizontal placement. A glossy plastic cover runs around the side, featuring the iconic Alienware logo on the front that illuminates in blue, along with a plastic section at the top that’s illuminated with LEDs.

ALIENWARE X51 – SPECIFICATIONS

Quad-core Intel Skylake processors are the new performance champions for PC gaming, if only by a disappointingly slim margin over the previous Core i7-4790K Devil’s Canyon chip. The X51 comes with a Core i7-6700K, but by default, it doesn’t run at its full 4.2GHz Turbo Frequency. Instead it’s limited to 3.9GHz, the lower clock speed is intended to keep down internal temperatures, which can be potentially problematic in small chassis gaming desktops.
The Alienware Command Centre software makes it easy to change this, however. With this R3 version of the X51 – there are four listed on Dell’s site – the CPU has an all-in-one liquid-cooling system that allows that clock frequency to be raised to 4.4GHz. This software also lets you fiddle with various settings – the Alienware FX mode, for example, which changes the colour of the LEDs on the top of the unit.
As with last year’s PC, Alienware has chosen a mid-range graphics card for the X51. The “Maxwell”-based Nvidia GeForce GTX 960 is a slight improvement over the Radeon R9 270 in the previous machine. It only has 2GB of GDDR5 memory, which isn’t a huge amount by today’s standards, but enough for solid 1080p performance. This card comes with 1,024 stream processors, 32 ROPS, 64 TMUs, a base clock of 1,127MHz and memory frequency of 1750MHz.
 It has 16GB of DDR4 memory, running at 2,133MHz. There’s also a 256GB Samsung PM951 PCI Express SSD, plugged directly into the motherboard’s M.2 slot. PCI Express SSDs come in all shapes and sizes, offering wildly different performance figures. Samsung’s 950 Pro is the current king by a long way, with read and write speeds of well over 1GB/sec; the enterprise-grade SM951 isn’t too far behind.
The PM951 isn’t quite as good, though. While it’s a PCI Express Gen 3.0 device including NVMe support, with quoted read speeds that are an impressive 1,000MB/sec, the 280MB/sec write speeds lag behind normal 2.5-inch SSDs. It’s inclusion is probably down to saving internal space from the small M.2 form factor, rather than the performance. But those read speeds are still very nice indeed.
Additionally, there’s a 2TB Seagate hard disk, an obvious essential for a large library of games or media.
Windows 10 Home comes as standard on all X51 configurations and Steam comes preinstalled as well. During testing, I was cursing Dell’s inclusion of the McAfee antivirus trial, which had expired and kept popping up during benchmark runs requesting I pay them money. Not a chance, matey.


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