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Item#: 9SIA0ZX2C39537

VANTEC 2-Port SATA II 300 PCIe Host Card w/RAID Model UGT-ST420R

  • PCI Express to SATA Card
  • 3.0 Gbps Data Transfer Rate

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  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Vantec UGT-ST420R




PCI Express to SATA Card
Internal Ports
Data Transfer Rate
3.0 Gbps
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

Customer Reviews of the Vantec UGT-ST420R

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  • Brian C.
  • 2/29/2016 6:56:10 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsA total disappointment!

Pros: For me, none.

Cons: Apparently incompatible with Intel Z170 chipset.

Drives connected to this card show up during post, but are not recognized after boot. Also some unknown process related to this card is consuming most of my CPU resources to the point of causing near total system freeze. I am using Windows 7, and this card is supposed to be compatible with it.

Other Thoughts: Contacted Vantec's customer service, that proved to be a waste of time.

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  • Richard E.
  • 9/22/2015 12:29:58 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggscard is okay, raid software not so great

Pros: The card works - (if raid is not an issue.) You can see your hard drive in the bios, and you can boot to a hard drive, either one, in the bios. Read the back of the box for model number, then find that folder on the installation disk.

Cons: The Raid software is junk. The documentation is weak - overly complicated - and doesn't really match the software, The in-windows raid controller is very strange, counter-intuitive - seems like something a large shop would use - but a large shop would not have a $30 soft raid card. You can set up your raid in the bios though - it might work for you - did not work for me but that might be the fault of my bios. I returned the card.

Other Thoughts: I am comparing this raid with intel matrix manager that my dell supported, because it had an intel northbridge, ich7r as I recall. This motherboard on this compaq microtower DC5800 has a no-name northbridge and doesn't support anything but ide - no ahci, no raid. The bios lets you set up a raid volume, but then my bios would not let me go to windows, or even to setup. However my bios also rejected a scsi card, that I was using on an old pentium 4 machine - so my bios is definitely junk. What I don't like about this raid, is that if you want to delete the raid volume, it will let you, but it won't let you convert a drive back to a non-raid drive, unless you perform low-level format, and destroy your data. The intel matrix manager bios allowed you to take a drive and make it a non-raid drive after you deleted the volume. So I didn't like that part at all. In other words, it won't go in and delete the metadata that it puts on a raid drive, showing connection, etc. Weak - not friendly. I was initially trying to create a raid set with one that had data, another that was empty. But again, it all would have failed because of my bios. I suggest to Vantec - "just try to copy Intel Matrix Manager as close as you can - what you have put together is terrible regarding raid." :)

Manufacturer Response:

Dear Customer,
We try hard to provide excellent customers service. If you have questions about our products, or anything that are not functioning the way it is advertised, please feel free to write to us for assistance at We will try our best to support and answer your questions. Thank you for looking into our products.
Best Regards, Vantec

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  • Alexey B.
  • 11/30/2014 7:53:30 AM
  • Ownership: 1 day to 1 week

5 out of 5 eggsWorks on older system

Pros: Works where other failed. Silicon Image chipset seems to have better compatibility than Marvel I tried before (failed even to boot to BIOS).

Cons: Somewhat slow.
Samsung magician does not recognize the SSD.
Seatools for windows also fail to find the drive.

Other Thoughts: I wanted to add 4 Tb drive to my older system and sure enough nForce chipset failed to see anything above 2Tb.
This card was a solution. Got recognized by BIOS at once. Bootable. Vista found new drivers.
It is kind off slow (plugged it in 4x slot), so I argue whether I should keep my boot drive on it

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  • Daniel S.
  • 6/26/2014 3:03:10 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsReally small card that JUST WORKS

Pros: It installs easily and does what it's supposed to do.

Cons: Limited by your motherboard speed, IDE only

Other Thoughts: Key points: IDE, bootable, Windows XP supported, RAID capable, works well with ASUS motherboards that often contain Marvel chipsets.

If you want to additional IDE SATA ports to a new or already installed Windows XP system AND be able to BOOT from it, this IS YOUR CARD. It will probably work well in other versions of Windows too, but my requirement was for XP.

My goal was to add a card to my system in IDE mode and NOT have to perform the Registry tricks to put Windows XP into AHCI mode.

The controller does appear in the BIOS load sequence and allows you to configure (via F2) a software RAID. Skip this if you are just adding SATA ports. Drives show up in the Boot Order so you can select them. THIS CARD IS BOOTABLE.

Once loaded, Windows XP detects it and asks for drivers. You can use the ones on the CD or go trolling for more up-to-date ones. Once the drivers are loaded and you re-boot, Windows XP sees this as a RAID card, but you can simply use both ports for additional SATA ports if you wish.

Installed in a PCIe 2.0 x16 slot, this device produced SATA 11 speeds, but I did NOT have any SATA III drives to test it with, so I cannot comment on this.

Five Eggs because Newegg got it here fast and because it worked just like it was supposed to.

2 out of 2 people found this review helpful. Did you? Yes No

  • Robert N.
  • 4/11/2014 12:02:40 AM
  • Ownership: 1 month to 1 year

3 out of 5 eggsWorks good but misleading speed

Pros: Works good in linux with the native kernel driver.
The Silicon chip does not conflict with the Marvell chipset that is already included on my motherboard. I've heard of conflicts arising when having more than one Marvell chipset in the system, that's why I went with this card.

Cons: This card doesn't work at SATA 300 speeds,
It sets up a SATA 300 link with my two SSDs but the transfers are hard capped at 125MB/s for each port.
The transfer speed doesn't change whether i plug in one or two SSDs.
Switching to the native Intel SATA 300 port or the Marvell one on the same motherboard gets me ~250MB/s.
I suspect this is due to the fact that the Silicon chipset is a Pci express 1.0 device and is capped at 2.5Gb/s even though its sitting in a Pcie 2.0 slot that's capable of 5.0Gb/s.
Looks like each port on this card is hard capped at half of pcie 1.0 bandwidth :/
Interesting fact that I discovered while troubleshooting the speed on this thing:
If I plug this card into the the x16 slot on my motherboard that is meant for a GPU, the transfer speeds improve to ~165MB/s. My suspicion is that the x16 lines coming from the CPU are faster that the ones coming from the chipset even though they are both "officially" pcie 2.0. I`m probably wrong but its something I discovered on my ASUS P8P67LE motherboard with an Celeron G1610.

1 out of 1 people found this review helpful. Did you? Yes No

  • Omar M.
  • 2/24/2014 11:50:54 AM
  • Ownership: 1 day to 1 week

3 out of 5 eggsNot AHCI Compatible

Pros: Simple and easy. Works with ASUS board.

Cons: Not compatible with AHCI - need to switch MOBO to IDE for this to behave with the other things in your PC.

2 out of 3 people found this review helpful. Did you? Yes No

  • Matt S.
  • 3/2/2013 9:09:35 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsNice Card

Pros: Compact little card. Works great. Nice RAID speeds.

Cons: My board has now basically rejected all PCIe x1 cards, so I cannot use it. T_T

0 out of 2 people found this review helpful. Did you? Yes No

  • Nick A.
  • 6/4/2012 2:43:16 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWorks As Described

Pros: Needed and extra SATA port since I am still rocking an IDE DVD ROM and didn't have enough ports on my mobo to use a SATA converter. Now I do. Yay.

Cons: None

Other Thoughts: It gets the job done. What else do you want from this thing anyways?

0 out of 1 people found this review helpful. Did you? Yes No

  • Benjamin C.
  • 4/3/2012 6:54:43 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsExtra Sata ports

Pros: Needed extra SATA ports for my computer so i could add a Blu-ray drive to my computer. Plus it uses the PCIe X1 slot that really doesn't have too many uses.

Cons: don't know yet.

Other Thoughts: I haven't had a chance to use it yet but i will update my review later once i do.

0 out of 7 people found this review helpful. Did you? Yes No

5 out of 5 eggsGreat for hot-plugging

Pros: This card has a Silicon Image Sil3132 chipset. I know the previous reviewer sees this as a con, but it is great when it comes to hot-plugging hard drives without having to do anything fancy.

Cons: Look elsewhere for performance (probably why the previous reviewer saw it as a con)

Other Thoughts: Brand name of the card itself is irrelevant. It's the chipset that counts. If you're connecting any kind of removable drive bay to this card, Silicon Image chipsets are the way to go, as JMicron chipsets tend to blue-screen Windows OS's (even with AHCI enabled) and Marvell's are hit-and-miss.

7 out of 7 people found this review helpful. Did you? Yes No

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Item#: 9SIA0ZX2C39537
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