Retesting the Radeon HD 4830: Too Few SIMDs Enabled
by Derek Wilson on October 25, 2008 12:00 AM EST- Posted in
- GPUs
Final Words
Well this has been a first. We never see review hardware that shows worse performance than we can expect: companies are always trying to pump things up when they send them to us. For instance, we very often get overclocked versions of graphics cards rather than the stock versions. I can't count the number of times I've had to re-run tests after discovering that I needed to underclock the review sample.
While the discrepancy isn't as large as it could have been, it does seem to have affected DX10 or shader intensive DX9 more heavily.
After re-running all of our test, we updated the original article with the new charts and data. The final conclusion really doesn't change that much, but we did tweak things a little bit. There will still be a heavy emphasis on price and finding the lowest one possible when deciding between the Radeon HD 4830 and the GeForce 9800 GT. But the Radeon 4830 does look a little better in this new light and there is less of a threat from the myriad overclocked 9800 GT versions.
The performance of the Radeon HD 4830 pushes up a little closer to the Radeon HD 4850, and that's a good thing as well. The 4850 is a great option, and for those who can spend the money to pick one up we recommend it. But the point of introducing lower priced models with good performance is to provide for those who can't afford the higher end hardware. For those who can't afford more than a Radeon HD 4830 (which can be had for as low as $110 after mail in rebate if you shop for it), AMD has provided hardware that is much more capable under current games than what we are used to seeing at this price point.
Today, for gamers with 1280x1024 and 1680x1050 sized monitors, the 4830 will provide a quality experience with maximum settings in most current games. The advantage of the Radeon 4850 will be that it could provide a bit more longevity with the capability to run higher settings in future games. While that is desirable it is very hard to predict what future games will perform like on any hardware.
We can sort of look at it like a game console. The hardware is capable of a certain quality level and resolution and while quality may improve a bit with experience over time, it is limited at a certain threshold. Your current and future games will always look as good as they look today, but the advancement in other games will make the cool new effects that are around now look much dimmer by comparison. What you know you are getting when you purchase a Radeon HD 4830 is hardware that will be capable of delivering at least the visual fidelity you see on these current games with resolutions and settings we tested. And that's pretty darn good if you ask us.
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CEO Ballmer - Sunday, October 26, 2008 - link
You people need to give Vista a second chance too!http://fakesteveballmer.blogspot.com">http://fakesteveballmer.blogspot.com
JonnyDough - Sunday, October 26, 2008 - link
a button. My guess is that AMD did this intentionally to get more people talking about their card.Griswold - Sunday, October 26, 2008 - link
Oh yea, I'm sure the somewhat unfavorable comparisons to the 9800GT in a number of reviews because of this mishap will magically turn into an advantage too.Glad you're not responsible for any marketing at AMD - you'd proof that it *can* get worse. :P
MrSpadge - Sunday, October 26, 2008 - link
from what you're writing it's clear that the x-axis indicates "performance improvement in %", but it's not written there. Professional graphs need proper axis.RagingDragon - Saturday, October 25, 2008 - link
So will be seeing a 4810 with 480 or 560 SP's? That'd fit nicely in between the 4670 and 4830...Also, are there any idications whether all 4830 will be made from partially disabled/defective dies? Or will AMD be fabbing smaller 4830 specific RV770's?
Goty - Saturday, October 25, 2008 - link
I highly doubt AMD would try to produce an entirely new chip for the 4830. The more SKUs you have, the more waste you get. The 4830 is a cost recuperating measure for the dice that don't make the bin for the 4850 or 4870.DerekWilson - Saturday, October 25, 2008 - link
if the 4830 overtakes the 4850 and 4870 combined in volume and amd runs out of parts binned for the lower performance part, they may need to make 4830s out of some GPUs that could handle higher performance.but there's a lot of ifs and such in that one. it's not impossible that some GPUs could be capable of running with all SIMDs enabled. but it might also be impossible to make the card tell the GPU to turn them all on (depending on how AMD has built the thing).
PrinceGaz - Saturday, October 25, 2008 - link
Hehehe, "dice". The last time I used them was in a tabletop D&D session. The last time I used real physical ones you could hold, anyway.The plural of "die" is "dies" for a manufactured physical component like a processor, or anything else for that matter. Pretty much any reliable online (and especially paper) dictionary will agree.
Talking about CPU dice is good for a light-hearted comment, but not for anything else.
Griswold - Sunday, October 26, 2008 - link
No, smartpants. Both works just fine. Open your eyes to the real world and you'll see.Goty - Saturday, October 25, 2008 - link
Most industry documents would disagree.