AMD's Radeon HD 5870: Bringing About the Next Generation Of GPUs
by Ryan Smith on September 23, 2009 9:00 AM EST- Posted in
- GPUs
Meet the Rest of the Evergreen Family
Somewhere on the way to Cypress, AMD’s small die strategy got slightly off-track.
AMD’s small-die strategy for RV770
Cypress is 334mm2, compared to 260mm2 for RV770. In that space they can pack 2.15 billion transistors, versus 956 million on the RV770, and come out at a load power of 188W versus 160W on the RV770. AMD called 256mm2 their sweet spot for the small die strategy, and Cypress missed that sweet spot.
The cost of missing the sweet spot is that by missing the size, they’re missing the price. The Cypress cards are $379 and $259, compared to $299 and $199 that the original small die strategy dictated. This has resulted in a hole in the Evergreen family, which is why we’re going to see one more member than usual.
As Cypress is the base chip, there are 4 designs and 3 different chips that will be derived from it. Above Cypress is Hemlock, which will be the requisite X2 part using a pair of Cypress cores. Hemlock is going to be interesting to watch not just for its performance, but because by missing their sweet spot, AMD is running a bit hot. A literal pair of 5870s is 376W, which is well over the 300W limit of a 6-pin + 8-pin power configuration. AMD saves some power in a single card (which is how they got the 4870 under the limit) but it likely won’t be enough. We’ll be keeping an eye on this matter to see what AMD ends up doing to get Hemlock out the door at the right power load. As scheduled we should see Hemlock before the end of the year, although given the supply problems for Cypress that we mentioned earlier, it’s going to be close.
The “new” member of the Evergreen family is Juniper, a part born out of the fact that Cypress was too big. Juniper is the part that’s going to let AMD compete in the <$200 category that the 4850 was launched in. It’s going to be a cut-down version of Cypress, and we know from AMD’s simulation testing that it’s going to be a 14 SIMD part. We would wager that it’s going to lose some ROPs too. As AMD does not believe they’re particularly bandwidth limited at this time with GDDR5, we wouldn’t be surprised to see a smaller bus too (perhaps 192bit?). Juniper based cards are expected in the November timeframe.
Finally at the bottom we have Redwood and Cedar, the Evergreen family’s compliments to RV710 and RV730. These will be the low-end parts derived from Cypress, and will launch in Q1 of 2010. All told, AMD will be launching 4 chips in less than 6 months, giving them a top-to-bottom range of DX11 parts. The launch of 4 chips in such a short time frame is something their engineering staff is very proud of.
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JonnyDough - Wednesday, September 23, 2009 - link
They could probably use a 1.5 GB card. :(yacoub - Wednesday, September 23, 2009 - link
why is the 5870 so freaking LONG??I'm pretty sure you could land aircraft on it.
http://images.anandtech.com/reviews/video/ATI/5870...">http://images.anandtech.com/reviews/video/ATI/5870...
Someone should photoshop a person into that image for scale. They'd be standing in the shadow underneath the PCIe connector, waving at you, and there would be an F-35 JSF circling like a fly trying to land on the deck.
Ryan Smith - Wednesday, September 23, 2009 - link
It's your standard, full-length 10.5" card. It's the same as the GTX cards and the 4870X2Here's a shot comparing it to a GTX 285 and a 4890 that I didn't get to use in the article.
http://images.anandtech.com/reviews/video/ATI/5870...">http://images.anandtech.com/reviews/video/ATI/5870...
SiliconDoc - Monday, September 28, 2009 - link
If you can't see the 5870 is the longest card in that pic, then you've got different problems than just lying issues.Another one, another big fat fib, with pic included, that proves the fib to be a fab fib.
It's amazing.
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"No, everyone, do not believe your lying eyes, it's a standard 10.5" measured in the new red rooster barnyard stick."
Cripes call International Weights and Measures, we have warped space time around the new ati card it's so powerful.
LSnK - Wednesday, September 23, 2009 - link
Or plainly spoken, angle independent angle-dependent filtering. How confusing.frozentundra123456 - Wednesday, September 23, 2009 - link
Mildly disappointed in the initial results for this card. It is powerful,admittedly, but it has less than twice the performance of the 4870. Also does not use less power. Maybe I was expecting too much. It surely is not a giant step up like the introduction of the 4xxx series cards. I was hoping for another big leap in performance per watt.I have a feeling that nVidia's 300 series will beat it when it finally comes out, although hopefully ATI will still be ahead in performance per watt and performance per dollar.
I hope they make a good low/midrange card like the 4670 that does not require external power but has increased performance.
Spoelie - Wednesday, September 23, 2009 - link
I reckon you'll see performance improve the coming months, as ATi's compiler improves to use the new instructions more efficiently. The card you see here today will not be the one fighting GT300.Granted, it won't make huge strides, but I guesstimate it to be 5-10% better, depending on circumstance/game, by the november-january timeframe (when GT300 hopefully lands).
Nvidia's baby will probably still be faster, but if the margin turns out to be slim, we'll have another rv770 vs GT200 situation playing out. And when the first wave of DX11 games have hit, somewhere next year, it'll be time to reevaluate again ;).
JonnyDough - Wednesday, September 23, 2009 - link
and I stopped. I had to post this:"Sometimes a surprise is nice. Other times it’s nice for things to go as planned for once.
Compared to the HD 4800 series launch, AMD’s launch of the HD 5800 series today is going to fall in to the latter category. There are no last-minute announcements or pricing games, or NDAs that get rolled back unexpectedly. Today’s launch is about as normal as a new GPU launch can get."
If it's normal for all that crap to happen, wouldn't it be ABNORMAL for AMD to have a great launch? :)
SiliconDoc - Wednesday, September 23, 2009 - link
LOL" . Today’s launch is about as normal as a new GPU launch can get."
I guess he meant "for reviewers" - since the "normal launch" today is "listed on the websites for sale, but greyed out, not available, or pre-order" - meaning NO STOCK.
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Yehah buddy, that is a "as normal as any launch" so long as it's the immensely favored ATI launching, and not that hated greedy Nvidia...
A normal launch and you can't buy the card...rofl.
JonnyDough - Thursday, September 24, 2009 - link
I wasn't being a fanboi, merely mocking normal launches from several companies. Seems like paper launches almost became the norm for awhile. :P