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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Ryan Smith - Wednesday, September 23, 2009 - link
The load temp is the same as a single card.ilnot1 - Wednesday, September 23, 2009 - link
Does anyone have a link to any review that compares 4850's, 4870's, and 4890's in Crossfire against the 5870 & 5870 CF setup?T2k - Wednesday, September 23, 2009 - link
FWIW: http://www.techpowerup.com/reviews/AMD/HD_5870_PCI...">http://www.techpowerup.com/reviews/AMD/HD_5870_PCI...T2k - Wednesday, September 23, 2009 - link
Ehh, I meant: http://www.techpowerup.com/reviews/ATI/Radeon_HD_5...">http://www.techpowerup.com/reviews/ATI/Radeon_HD_5...ilnot1 - Wednesday, September 23, 2009 - link
Thanks T2k, but the only cards that are in Crossfire in that review are the 58XX's. There are no other comparisons to cards in CF or SLI. Since Ryan included some of the most recent nVida cards in SLI I was hoping to find the 48XX's in CF.T2k - Thursday, September 24, 2009 - link
Basically the rule of thumb seems to be that at 1920x1200 a single 5870 is still slightly slower than 4870X2 and probably slightly faster than a 4850X2 2GB.I own the latter so I will wait this time - either they lower the initial price of the 5870X2 or they release a 5850X2, otherwise I'll pass because single 5870 is simply OVERPRICED as it is already.
T2k - Wednesday, September 23, 2009 - link
Seriously: we get a very nice technical background section - then you top it with this more than idiotic collection of games for testing, leaving out 4850X2 2GB, 5850, using TWO stupid CryEngine-based PoS from Crytek, the most un-optimized code producers or WoW, of which even you admit it's CPU-bounded but now CoD:WaW, no Clear Sky, no UT3 or rather a single current Unreal Eninge-based game?Benchmarking part is ALMOST WORTHLESS, the only useful info is that unless you go above 1920x1200 the 4870X2 pretty much owns 5870's @ss as of now.
Ryan Smith - Wednesday, September 23, 2009 - link
For what it's worth, Batman: Arkham Asylum is UE3 engine based.T2k - Wednesday, September 23, 2009 - link
OK, I missed that (probably because I found the game shots ugly and became uninterested.)But how about ET:QW? Yes, it's not the best looking game but it is still popular, let alone World at War which is both great looking and crazy popular, let alone Clear Sky which is a very demanding DX10.1 game? Where is Fallout 3? Where is Modern Warfare?
FFS the most demanding are the quick ation-shooters and we, FPS players are the first one to upgrade to new cards...
Werelds - Thursday, September 24, 2009 - link
How would ET:QW be a good benchmark? Last I checked, it's still limited to the 30 FPS animations, which makes running it at more than 30 FPS pointless because everything will look jerky.I agree something like the CoD games should be included for comparison's sake, but they're hardly a good benchmark or taxing on a system. QW does not fall into the same category though, it has a smaller active playerbase than even L4D which lost a lot of players due to the lack of updates.