Scan 3XS Velocity X79 SLI Extreme review

Price when reviewed

Despite this, there’s the occasional sign that Scan’s build isn’t as impeccable as usual. There’s a big bunch of cables through the middle that we’d normally expect to be hidden behind the motherboard tray, and another unsightly bunch at the top of the chassis is gathered around the watercooling unit, SATA dock, and Blu-ray drive.

The Corsair H100 cooling unit hides a 240mm radiator in the roof of the case, so its water block doesn’t impede much of the motherboard – the four spare DIMM sockets, with two either side of the LGA 2011 socket, are easily accessible.

Upgrade room isn’t quite so generous elsewhere. The two graphics cards mean that only single PCI Express x1 and x16 slots are free on the motherboard – and even then they’re difficult to access. The empty SATA ports are just as tricky to reach, and you’ll only be able to add one extra hard disk or SSD, as half of the side-facing, tool-free bays have been removed to accommodate the graphics cards.

Scan 3XS Velocity X79 SLI Extreme

Our thermal and power tests offered mixed results, too. The Corsair cooling worked extremely well, reining the overclocked processor in to a maximum temperature of 74°C, and both graphics cards peaked at a perfectly fine 83°C. The idle and peak power draw results of 231W and 843W make for less impressive reading, though, and noise was also an issue: the noticeable rumble when idling upgraded to an irritating roar during those stress tests.

If you don’t already have any, you’ll want some beefy speakers to drown out the noise, but when you’re already spending £2,686 inc VAT that’s disappointing. There’s no denying the sheer gaming power of Scan’s latest, but if you’re willing to accept a small step down the performance ladder the Chillblast will save you almost £1,000 – and that’s too much to pass up.


Warranty2 yr return to base 1st year on-site, 2nd year RTB

Basic specifications

Total hard disk capacity1,120GB
RAM capacity16.00GB


CPU familyIntel Core i7
CPU nominal frequency3.20GHz
CPU overclocked frequency4.70GHz
Processor socketLGA 2011
HSF (heatsink-fan)Corsair H100


MotherboardAsus P9X79 Pro
Motherboard chipsetIntel X79
Conventional PCI slots free0
Conventional PCI slots total2
PCI-E x16 slots free1
PCI-E x16 slots total3
PCI-E x8 slots free0
PCI-E x8 slots total0
PCI-E x4 slots free0
PCI-E x4 slots total0
PCI-E x1 slots free1
PCI-E x1 slots total2
Internal SATA connectors6
Wired adapter speed1,000Mbits/sec


Memory typeDDR3
Memory sockets free4
Memory sockets total8

Graphics card

Graphics cardNvidia GeForce GTX 580
Multiple SLI/CrossFire cards?yes
3D performance settingMedium
Graphics chipsetNvidia GeForce GTX 580
Graphics card RAM1.50GB
DVI-I outputs4
HDMI outputs2
VGA (D-SUB) outputs0
DisplayPort outputs2
Number of graphics cards2

Hard disk

Hard diskCorsair Force GT
Hard disk usable capacity111GB
Internal disk interfaceSATA/600
Hard disk 2 make and modelWestern Digital Caviar Black
Hard disk 2 nominal capacity1,000GB
Hard disk 2 formatted capacity931
Hard disk 2 spindle speed7,200RPM
Hard disk 2 cache size64MB


Optical disc technologyBlu-ray writer

Additional Peripherals

Sound cardCreative Soundblaster X-Fi Titanium


ChassisCorsair Obsidian 650D
Case formatFull tower
Dimensions229 x 546 x 521mm (WDH)

Free drive bays

Free front panel 5.25in bays3

Rear ports

USB ports (downstream)6
eSATA ports2
PS/2 mouse portyes
Electrical S/PDIF audio ports0
Optical S/PDIF audio output ports1
3.5mm audio jacks8

Front ports

Front panel USB ports2
Front panel memory card readerno

Operating system and software

OS familyWindows 7

Noise and power

Idle power consumption231W
Peak power consumption843W

Performance tests

3D performance (crysis) low settings131fps
3D performance settingMedium
Overall Real World Benchmark score1.34
Responsiveness score0.98
Media score1.50
Multitasking score1.53

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