AMD has identified that, in addition to reference samples of the ATI Radeon™ HD 4830 boards sent to media with a pre-production BIOS potentially impacting the card’s performance, a very limited number of ATI Radeon™ HD 4830 boards were released to market with the same pre-production BIOS. This is in no way hardware related, and an updated BIOS fully resolves the performance limitation.
Through consultations with AMD board partners, it has been determined with a high degree of certainty that fewer than 400 ATI Radeon™ HD 4830 boards from one AMD board partner, HIS, have reached the market with the pre-production BIOS incorrectly provided by AMD. As only a small number of HIS-branded ATI Radeon™ HD 4830 cards are impacted, we ask any customers that purchased an HIS-branded ATI Radeon™ HD 4830 to test the board using the GPU-Z utility (available at http://www.techpowerup.com/gpuz). If the GPU-Z utility reports fewer than 640 shaders, please visit the HIS website for information on how to update the card BIOS via a downloadable install utility.
We had thought that retail parts would be fused to a certain number of active SIMDs to avoid soft mods and that review samples were probably based on test/engineering hardware AMD was using when developing the final specs for the Radeon HD 4830. It seems that theory is out the window, but we will continue to provide updates as we learn more.
Thursday, AMD launched their newest RV7xx variant completing their line up in time for the holiday season. As is usual with a new graphics card launch, we published a review. The hardware looked good and offers gamers that really want to play games with good quality but don't need high resolution performance a solid money saving option.
But a number of curious things happened throughout the course of the day yesterday. We first noticed an interesting article from the makers of GPU-z. Techpowerup.com posted a story on the fact that their reference sample from AMD only enabled 560 SPs rather than the full 640 we were all promised.
We were certainly intrigued by this, so we picked up the updated GPU-z and it told us we also only had 560 SPs. Now, this isn't a common occurrence at all, and multiple other issues could have been at work. We wanted to hold off on commenting until we could learn what was really goning on and bring you the whole story. It took us a while to sort everything out, and with this issue out there it's understandable why AMD needed some time to track down the causes and potential effects of this problem.
All the details we have point to the missing SP problem being limited to review samples only. AMD's partners should not have this issue pop up in the wild. This is good news for consumers, and good news for AMD as well. We saw that the 4830 wasn't a bad part, but because our tests were run with 87.5% of the full compliment of SIMDs our numbers don't reflect the full performance potential the hardware has.
AMD got us an updated BIOS for the card and we have new numbers showing the performance improvement. We have updated our tests from the other day to better reflect the relative performance end users can expect.
It is also worth noting that AMD has supplied all their partners with an updated BIOS as well to cover the just-in-case scenario. They believe they know why this happened and so believe that there is no cause for concern over retail parts exhibiting this problem. But giving their partners a new BIOS is a good idea anyway as it covers all the bases.
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But in this business competitive isn't always good enough. AMD came out of the gate swinging for a knock out. And they did a good job of winning a significant amount of mindshare. They built a good product and priced it very aggressively at launch. While our concern is the current state of things, and our recommendation will be for the part that gives our reader the best value, that's not how every graphics card enthusiast sees it. The things companies do (like initially selling their hardware at way too high a price) can significantly affect the position of some enthusiasts.
That might be one reason NVIDIA went down the core 216 path with the GTX 260. A name more like GTX 265 would have been nice, and we already talked about how much we don't need dozens of parts all with slight tweaks and price differences cluttering up the market. But, the core 216 did help make NVIDIA's hardware more competitive (even if it didn't put it over the top). And more competitive is a good thing. Better competition does nothing but benefit the consumer, and we love to see it. If NVIDIA took that step because they want to win back some mindshare then that's fine with us. All we care about is what performs best in a price class, because that is what benefits our readers.
Of course, the core 216 might also have been anticipating the eventual availability of the Radeon 4870 1GB. In which case, the core 216 falls short.
Well, it isn't just that the GTX 260 falls a little short. The fact is that the extra RAM really does make a significant difference in many high quality high resolution situations when playing current games. We didn't expect the gains we see here, and combined with the original stellar performance of the Radeon HD 4870, we have to say that we are impressed.
The Radeon HD 4870 1GB has the same number of GDDR5 chips on board, but the devices on the 1GB model are double the density of the 512MB part.
The 512MB card we have uses Qimonda GDDR5, while the 1GB model we tested has Hynix devices. As GDDR5 is still pretty new, it is likely that the delay in getting out the 1GB model of the 4870 had to do with delays in getting a high enough supply of high density RAM.
Anyway, we mentioned that the GTX 260 core 216 doesn't quite keep up now that the 4870 has twice as much RAM. Let's take a look ath exactly how short it falls, first in terms of how much performance we gain over the original model and then in absolute terms.
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ATI Radeon HD 4870 X2 graphics card is the fastest solution in the market these days. However, it is pretty expensive and the card itself is so large that may not fit in some system cases. Today we decided to discuss the performance of two ATI Radeon HD 4870 solutions - from VisionTek and Club 3D - in order to determine if a CrossFire tandem like that could become an alternative to the top-of-the-line ATI Radeon solution.
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