Gigabyte G1.Assassin X58 Motherboard Review

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It's becoming more difficult to justify the purchase of Intel's X58 Express chipset with all the new technology looming on the horizon. This chipset came out almost three years ago. Time sure flies, especially in the hardware industry. We still like the fact that the X58 offers support for the six core processors in Intel's lineup, along with triple channel memory. However, after the success of Sandy Bridge processors and their associated chipsets, one has to wonder how much longer the major manufacturers will be willing to pick from this tree.

One thing is certain. Gigabyte will not be the first to move away from the X58. Their latest G1 Killer series of X58 motherboards are specially designed for gamers that accept no compromises. There are three products in this particular line up: the G1 Assassin, G1 Sniper, and G1 Guerrilla. In a military motif, all three come with a black and green color scheme, along with heat sink designs that resemble gun barrels and magazine clips. Today, we're looking at the big brother of the group, the G1 Assassin. It supports Core i7 LGA 1366 processors, offers six memory slots with support for a max capacity of 24 GB, four PCI Express x16 slots, Creative Sound Blaster X-Fi digital audio processor, Bigfoot Network's Killer E2100, SATA 6Gbps, USB 3.0, 16 phase power, and Gigabyte's Ultra Durable 3 specifications.

Gigabyte G1.Assassin X58 Motherboard
Specifications & Features

Intel Core i7 LGA1366
Intel X58 Express
Six 1.5V DDR3 DIMM sockets
Up to 24 GB
Creative CA20K2 chip
7.1 channel HD audio

Bigfoot Killer E2100 chip
Marvell 88E1118R phy

Expansion Slots
Two PCIe x16 @ x16 slots
Two PCIe x16 @ x8 slots
Two PCIe x1 slots
One PCI slot
Supports up to 3-way SLI and 4-way  CrossFireX
Storage Interface
South Bridge supports six SATA 3Gb/s connectors
Marvell 88SE9182 supports two SATA 6Gb/s connectors
Form Factor
XL-ATX / 13.6” x 10.4
Manufacturer Warranty
3 Year Limited Warranty


At $459, the G1 Assassin is not cheap. But of course, flagship products never are. It's not the most expensive X58 board you can buy either. The dual socket SR-2 from EVGA currently holds that title, with a street price of $579, although that board requires Xeon processors. Asus also offers an ultra high end mobo, the Rampage III Black Edition, which costs $559. That's definitely a budget buster no matter how you slice it. Compared to those two, Gigabyte's G1 Assassin is a bit more affordable, but still a lot more expensive than the majority of X58 options currently available.

Since the demand for no-holds-barred motherboards is strong enough, big name companies like Gigabyte will continue to manufacture over the top hardware to fill the need. So what exactly do you get for $459? Before we get to the performance numbers, let's take a closer look at the features of G1 Assassin on the following page.

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OptimusPrimeTime 3 years ago

"Excellent review, its one heck of a motherboard, and I love its design. It is what it is and it has its purpose even with Sandy Bridge out. Now, a word to Gigabyte, you guys have to stop with the UD name branding, UD7, UD5, UD4, UD3, UD3B, UD3B-A , this is nuts. The naming scheme has got to go. Asus has the Rampage line, Crosshair, Sabertooth, WS Revolution,all recognizable and people know what they stand for. Stop putting out so many boards.'


OSunday 3 years ago

The product is amazing, what impresses me the most is an integrated Creative Audio 7.1 Soundchip, and the Bigfoot killer network card, those are little perks that save you space on the board since you don't have to add external cards, the design is awesome, especially for a themed rig but the $459 price tag is so daunting

It confuses me why companies like Gigabyte, EVGA and Asus release multiple motherboards within the $400-$600ish price range, it seem's like once you break about $300 on a motherboard you entering hardcore enthusiast territory, so each company should have 1 hardcore enthusiast board because an enthusiast mean someone interested in one particular subject or category and that mean's they want the best of the best so I'd imagine that the low end "enthusiast boards" don't sell that well

omegadraco 3 years ago

Great review, Gigabyte is really kicking some butt with this board. I love the green and black color scheme. Could you imagine a nice black case with the interior painted to match this board :)

inspector 3 years ago

Awesome one guys! Gigabyte makes some great ones :) price is meh...

AKwyn 3 years ago

I never thought I'd see the day. A Bigfoot NIC on a motherboard (the Creative Sound Blaster X-Fi integrated I'm not so sure about) Thank you Gigaybte for being the first to make this happen!

Anyways, this seems like a good board... I'm sure LGA1366 users will be pleased by this godsend of a motherboard.

realneil 3 years ago

$460 bucks at Newegg. Wow! I'll stick to Sandy Bridge. I can't afford to spend like this for just a Mainboard, no matter how nice it is.

rrplay 3 years ago

Thanks for the review , even though I would not be considering a board such as this The G1 Assassin Gigabyte board could be the ultimate mainboard upgrade for some espesically the bigoot NIC that 's intergrated .I like how you test and explain the actual power draw tests at the outlet [always did] esp when other comaprisons of performance are pretty close with other benches the GB G1 Assassin.seems a bit more efficient to me

big performance & big bucks $460 ?? yeowzers!

LBowen 3 years ago

Finally had time to sit down and read through the review. Very thorough and I especially liked the benchmark showcasing the network card. I always wondered how efficient it could be compared to their claims and that shed some light onto the subject. I agree with a lot of the others that say go for the Z68 or just wait for the next big Intel release instead; the pricing is just to much too invest into.

Blazer 3 years ago

Thanx for the review. the board looks awesome, but while the bigfoot nic is nice, I have almost the same throughput with the dual nic's in my X58 UD5. (that is one of the nice things about this board, the abillity to chain the nic's together), and  who uses UDP anyway?

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