Gigabyte Radeon HD 5870 Super Overclock

Last but not least we have Gigabyte’s top-end custom card, the 5870 Super Overclock. If the Sapphire Toxic is a card for buyers that just want a factory overclocked card, and the MSI Lightning is a card for serious overclockers, then the 5870 Super Overclock would best be described as fitting right in the middle of the two. It has the highest factory overclock of the cards we’re looking at today, but it also was designed for some overclocking by including voltage adjustment capabilities.

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Compared to the last Super Overclock card we saw, the 5870 Super Overclock is a far more custom card. If anything, while Gigabyte will never present it in that manner, it’s highly reminiscent of MSI’s previous generation of Lightning series cards. The Lightning series of cards are traditionally well-designed, so it’s a very good design to model a new card after.

Getting down to business, at the base of the Super Overclock is Gigabyte’s custom PCB, measuring 10.5” long. The Super Overclock is part of Gigabyte’s Ultra Durable VGA family, with Gigabyte advertising that there’s 2 ounces of copper in the PCB. On the back side of the card are 6 LED lights representing the VRM power phases, and on the front side are voltage check points.

Unfortunately the implementation of the voltage check points makes them nearly useless – unlike MSI who provides cables for accessing the voltage check points on the Lightning, on the Super Overclock the voltage check points are merely very small contact points on the card itself. We have our doubts over whether anyone can easily reach these points, and it strikes us as a major oversight to not ape MSI all the way here.

Moving on, component selection is similar to the other cards in our roundup. Trademark to their Ultra Durable line, Gigabyte is using solid state chokes and solid capacitors throughout the card. Also on the card are NEC Tokin Proadlizer decoupling capacitors, which Gigabyte is using along with MSI. Gigabyte makes this a significant marketing point, clearly advertising that they are using 5 of them, with all 5 laid out in an obvious manner on the back of the card. This also gives us an excellent opportunity to see a Proadlizer up close – at first glance they’re easy to mistake for a GDDR5 chip.

Powering the card is a pair of 6pin PCIe sockets. Although 8pin power sockets aren’t a necessity for overclocking, this along with the smaller number of VRM phases are the two strongest signs that Gigabyte is not targeting the extreme overclocker quite like MSI is.

For cooling Gigabyte is using an assembly that strongly resembles MSI’s Twin Frozr, making this the other reason we keep comparing the Super Overclock to the Lightning series. At the base is a card-sized heatsink with 4 heatpipes attaching the heatsink to the baseplate over the GPU, and over that a pair of 80mm fans with a partial cover. Interestingly unlike MSI who orients their fans parallel to the card, Gigabyte has slightly tilted the fans on the Super Overclock so that they face the center of the card. Gigabyte cites this as being done to minimize turbulence; however we don’t have any practical way to confirm that. Meanwhile the entire cooler is partially covered, directing the bulk of the airflow towards the front and rear of the card. So like every other card in this roundup, you’ll want a well-ventilated case for this card.

As we mentioned previously a big part of this card is the factory overclock. Gigabyte is shipping the card with a 950MHz core clock and 1.25GHz (5GHz effective) memory clock, making the Super Overclock the fastest factory overclocked 5870 that we’re aware of. This gives the Super Overclock a solid 100MHz (12%) over the reference 5870 on the core clock, and more petite 50MHz (200MHz effective, 4%) overclock on the memory.

Much of this comes down to Gigabyte’s extra binning of their chips through their GPU Gauntlet binning process, which allows them to sell completed boards as various products (Ultra Durrable, Overclock, Super Overclock) depending on the speed the complete board can reach. Unfortunately Gigabyte is using a non-standard VRM controller here and so we can’t read the core voltage with tools such as GPU-Z, but we believe the card ships at 1.18v.

Finally for the hardware side of things, as with the rest of the cards in our roundup today, Gigabyte is using the standard Eyefinity port configuration: 2xDVI, 1x DP, and 1x HDMI.

As for the software side of things, the 5870 Super Overclock marks the introduction of a new piece of overclocking software from Gigabyte: OC Guru. OC Guru is Gigabyte’s latest shot at a video card overclocking utility, and unfortunately due to Gigabyte’s use of a non-standard VRM controller, it’s the only way to read and control the card’s core voltage. In theory OC Guru has many of the hallmarks of a solid overclocking utility – overclocking profiles, voltage adjustment, and even an OSD, but it lacks any real hardware monitoring/logging support, rendering it only suitable for controlling the card as opposed to monitoring it.

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Even then OC Guru fails to adhere to the KISS principle, a problem that many other  manufacturer-supplied overclocking utilities also run in to. It’s poorly documented and unintuitive, laggy, and in the case of its power-consumption readouts flat-out wrong.  We’ll give Gigabyte credit here for at least trying, but ultimately you aren’t going to want to use this utility for anything more than you have to: voltage adjustment.

For voltage adjustment Gigabyte lets you increase the core voltage by up to 0.1v, putting the maximum core voltage at 1.28v. As with the MSI Lightning this is more than the cooler can handle, and we found that in practice the cooler could only keep temperatures manageable up to 1.26v. We’ll have more on this later when we take a look at overclocking.

Finally the pack-in items are your usual assortment of bare-bones items: a fairly generic manual, a driver/utility CD, 2 4pin molex-to-PCIe power adaptors, a CF bridge, and a VGA dongle.

The retail price of the card is around $500, similar to the other cards in our roundup. As of this moment it looks to be readily available.

MSI Radeon HD 5870 Lightning The Test
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  • bobsmith1492 - Wednesday, May 19, 2010 - link

    As an electrical engineer, I wouldn't want to buy a card that is clocked so close to it usable limit. It's just begging for premature failures, especially at such high temperatures. A few months of dust build up and these cards will be pushing 120C, typically the level where components' lifespans are drastically reduced. I hope I'm wrong but I can't see video cards pushing much more horsepower without some serious form factor modifications. Reply
  • The0ne - Wednesday, May 19, 2010 - link

    Nope, most enthusiasts believe their system will run free of dirt and grime for years and years and temperatures will stay the same. Once a part is tainted it becomes harder and harder to have it stay cleaned :) Take CPU fan for example hahaha Reply
  • iamezza - Thursday, May 20, 2010 - link

    Old toothbrushes work brilliantly for cleaning dusty fans and heatsinks - to a 'good as new' state ;) Reply
  • Folterknecht - Wednesday, May 19, 2010 - link

    Hi Ryan!

    What BIOS did your GB HD5870 use? There are two availeble "F2" and "F3". From discussions in the german GB-Support-Forum regarding GB HD 5850 OC, which is using the same cooler as far as I can tell, new BIOS-Versions were created to deal with some issues including noise.
    There have been many angry posts, because GB advertised this cooler as "SUPER SILENT"!

    If your test sample used "F2" an update to "F3" and eventual changes in idle characteristics would be interesting, if the test sample is still available.

    Thanks for this interesting review

    Folterknecht
    Reply
  • cactusdog - Wednesday, May 19, 2010 - link

    Gigabyte cant make a decent OC card. Just like their 4870 with the one speed noisy zalman fan and no fan adjustment. They just dont get it.

    I had high hopes for this new 5870 version but looks like they screwed up again. Apparently they released the card with one clock mode (flat out) no 2D clocks, no UVD clocks, just max clocks. As the previous poster said ,maybe the card in this review has the original bios.

    Reply
  • Ryan Smith - Wednesday, May 19, 2010 - link

    We're using the F3 BIOS. Reply
  • NinjaGnome - Wednesday, May 19, 2010 - link

    I wish they would offer a card that either included a waterblock or came with no heatsink at all so the user can choose a waterblock or aftermarket cooler. I dont want to pay for an expensive oc version just to throw the block away so I can throw a waterblock on it. Reply
  • sirizak - Wednesday, May 19, 2010 - link

    Here you go: http://www.powercolor.com/us/products_features.asp...

    Also if you want to add aftermarket cooling I would suggest buying a reference card (with the full shroud, fan at the rear and AMD printed above the PCIe Connnector) most aftermarket cooler manufacturers are only supporting the reference design.
    Reply
  • sirizak - Wednesday, May 19, 2010 - link

    Something I think this review missed was VRM cooling on these non-reference cards, the reference HD 5870 provides superior VRM cooling compared to most non-reference cards and allows for Voltage Control. I have managed 950Mhz Core Stable on my reference card without adding any voltage.

    I would have loved to see some VRM temps for each card under load, and perhaps a description of the type of VRM cooling they are offering.

    Other than that great review, I was tossing up about the MSI and Gigabyte when I was purchasing so I found this really interesting, if a little late for my decision making :)
    Reply
  • Ryan Smith - Thursday, May 20, 2010 - link

    Unfortunately none of these cards are using VRMs that our existing tools can read temperatures from. This was particularly frustrating with the Gigabyte card, as we could see it throttling but couldn't see the temperature that was triggering it. Reply

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