G.Skill hasn't been a very visible SSD OEM lately. Like many DRAM module companies, G.Skill entered the market early around 2009 when the market was very immature and profits were high, but lately the company has more or less been on a hiatus from the market. Even though G.Skill has had an SF-2281 based Phoenix III in the lineup for quite some time, it never really did anything to push the product and a Google search yields zero reviews for that drive (at least from any major tech review outlet).

However, back at Computex this year G.Skill showcased a prototype of its next generation SSD: the Phoenix Blade. Unlike most SSDs on the market, the Phoenix Blade utilizes a PCIe 2.0 x8 interface, but unfortunately it is not the native PCIe drive many of you have been waiting for. It is driven by four SandForce SF-2282 controllers in a RAID 0 configuration. It makes sense for G.Skill to pursue the ultra high-end niche because the SATA SSD market is currently extremely populated. It ends up being close to impossible for the smaller OEMs to compete against giants like Samsung, SanDisk and Crucial/Micron while being profitable, since ultimately the NAND manufacturers that are vertically integrated will always have a cost advantage.

G.Skill Phoenix Blade Specifications
Capacity 480GB
Form Factor Half-Height, Half-Length (HHHL)
Interface PCI Express 2.0 x8
RAID Controller SBC 208-2
NAND Controller 4x SandForce SF-2282
NAND Toshiba 64Gbit 19nm MLC
Sequential Read Up to 2000MB/s
Sequential Write Up to 2000MB/s
4KB Random Read Up to 90K IOPS
4KB Random Write Up to 245K IOPS
Power Consumption 8W (idle) / 18W (max)
Encryption AES-128
Endurance 1536TB (~1.4TB per day)
Warranty Three years

At this moment the Phoenix Blade is only available in 480GB capacity, although G.Skill plans to add a 960GB model later. 480GB is a logical choice because for the target group 240GB would be too small in many cases and doesn't provide the same level of performance, whereas the cost of the 960GB would push most shoppers away. In the end, G.Skill hasn't been actively involved in SSDs recently, so doing a 'soft' launch and observing the market's reaction is a safe strategy.

The interesting spec is the endurance and it's not a typo. G.Skill is indeed rating the Phoenix Blade at 1,536TB, which translates to 1.4TB (i.e. 1433.6GB) of writes per day for three years. I asked G.Skill about the rating method and I was told it's simply raw NAND capacity multiplied by the number of P/E cycles, which is then divided by the average write amplification. G.Skill assumes an average write amplification of 1x due to SandForce's real-time data compression, so 512GB*3,000/1 yields 1,536TB. As G.Skill's SSD venture is solely consumer focused, it has no reason to artificially limit the endurance to boost its enterprise SSD sales like many vendors do, although I am concerned whether the Phoenix Blade has been fully validated for workloads that write over a terabyte of data per day.

Delving into the Phoenix Blade reveals a massive metal heatsink that covers nearly the whole PCB (or both PCBs, actually). There's plenty to cool since each SF-2282 can draw up to ~4W under load plus at least another couple of watts for the RAID controller, which results in a maximum power rating of 18W according to G.Skill's data sheet.

Taking off the heatsinks reveals the main PCB as well as the daughterboard. Both are home to two SF-2282 controllers with each controller being connected to eight dual-die 16GB NAND packages (i.e. 32*16GiB=512GiB of NAND in total).

The RAID controller in the Phoenix Blade is a complete mystery. Googling the part number doesn't bring any light to the situation and due to confidentiality agreements G.Skill is tightlipped about any details regarding the controller. My best guess is that the controller features firmware from SBC Designs with the actual silicon coming from another vendor.

Update 12/13: It turns out that the controller has actually nothing to do with SBC Designs as it's from Comay that is a brand used by CoreRise, which is a Chinese SSD manufacturer. In fact, the Phoenix Blade looks a lot like CoreRise's Comay BladeDrive G24, so I wouldn't be surprised if G.Skill was sourcing the drives from CoreRise and rebranding them (nearly all memory vendors do this -- very few do the manufacturing in-house). I'm still inclined to believe that the silicon is from a third party as CoreRise's product lineup suggests that the company doesn't have the expertise that's needed for semiconfuctor design and development, but the firmware is likely unique to CoreRise.

The Phoenix Blade is bootable in any system. Upon boot, the drive loads legacy drivers before the BIOS and hence it can be selected as a boot device just like any other drive. Loading the drivers adds a few seconds to the boot time, but other than that the Phoenix Blade behaves like a normal SATA drive (but with much higher rated peak performance). TRIM and SCSI unmap are also supported.

While not easily visible in the photo due to residue from thermal pads, the Phoenix Blade uses the new B2 stepping of the SF-2282 controller. The fundamental design of the controller has remained unchanged, but the new stepping introduces DevSleep support for improved power efficiency, although in this case DevSleep brings no real added value.

Test System

CPU Intel Core i5-2500K running at 3.3GHz (Turbo & EIST enabled)
Motherboard ASRock Z68 Pro3
Chipset Intel Z68
Chipset Drivers Intel + Intel RST 10.2
Memory G.Skill RipjawsX DDR3-1600 4 x 8GB (9-9-9-24)
Video Card Palit GeForce GTX 770 JetStream 2GB GDDR5 (1150MHz core clock; 3505MHz GDDR5 effective)
Video Drivers NVIDIA GeForce 332.21 WHQL
Desktop Resolution 1920 x 1080
OS Windows 7 x64

Thanks to G.Skill for the RipjawsX 32GB DDR3 DRAM kit

Performance Consistency & TRIM Validation
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  • personne - Friday, December 12, 2014 - link

    Oh nice, how did I miss that? Must have been thinking of another site. Thanks.
  • vLsL2VnDmWjoTByaVLxb - Friday, December 12, 2014 - link

    "there is a market in users with older motherboards for whom the XP941 is simply not an option due to the lack of boot support."

    Presumably an enthusiast or one in the higher-end workstation markets would already have a suitable boot device so I don't see this as a hindrance. This is already a high-end product, so buying a motherboard to fit the niche would be expected.

    Kinda like you don't bemoan a high-power GPU for it's inability to work on low-power supply systems.
  • Kristian Vättö - Friday, December 12, 2014 - link

    I'm not sure I agree with this. Many enthusiasts/professionals haven't seen the appeal to upgrade from Sandy/Ivy Bridge setups, so it's not just the motherboard that needs to be updated.
  • DanNeely - Friday, December 12, 2014 - link

    I definitely don't agree with it. The only reason I'm planning to replace the core of my even older i7-930 system is that it's gotten old enough that an old age failure is becoming more likely and I don't want to do a rush upgrade when something catastrophically fails.
  • hojnikb - Friday, December 12, 2014 - link

    And i'm just here, expection a native pci-e solution.... Damn, raid0 sandforce is really annoying. Atleast use a proper controller, like marvell.
    And trim still doesn't seem to work properly...
  • UltraWide - Friday, December 12, 2014 - link

    Would it be more prudent to wait for an NVMe based PCIe SSD? Maybe the Intel DC P3500 that is about to start selling in the next few weeks?
  • Kristian Vättö - Friday, December 12, 2014 - link

    I thought about mentioning the P3500, but it's been "about to start selling in the next few weeks" for the past six months, so I decided not to mention it since there is still no real schedule for its release.
  • Luke212 - Friday, December 12, 2014 - link

    Kristian why does noone bother to bench to P3600? I only need read performance and the P3600 might be suitable. its cutting edge tech yet noone has bothered to review it!
  • Kristian Vättö - Saturday, December 13, 2014 - link

    Intel hasn't sampled media with the P3600, that's why.
  • otherwise - Monday, December 15, 2014 - link

    I too have been waiting for this drive, but considering it was pulled from Intel's website, I don't think we're going to see it. I am going to guess that Intel though it would completely cannibalize P3600 sales, which it probably will if it sees the light of day.

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