AMD Radeon HD 7750 & Radeon HD 7770 GHz Edition Review: Evading The Price/Performance Curve
by Ryan Smith & Ganesh T S on February 15, 2012 12:01 AM EST- Posted in
- GPUs
- AMD
- HTPC
- GCN
- Radeon HD 7000
Final Words
Wrapping things up, I once had someone comment to me that they can gauge my opinion of a product based solely on the first paragraph of the final page. If I say “there’s no such thing as a bad card, only bad prices” then it’s likely not a favorable review. That statement is once more being validated today, if only in a meta context.
To be clear, we’ve been waiting for some time to see GCN filter down to lower priced cards, and even longer to see PowerTune in particular make it down here. The fact that we now have reliable power throttling and solid compute performance is not lost on us. It’s a welcome advancement.
However our expectation with a new manufacturing process – and perhaps we’re being greedy here – is that we’ll see cards become cheaper and we’ll see power consumption come down. AMD has achieved the second item in spades, and as a result both the Radeon HD 7750 and Radeon HD 7770 are well ahead of any competing 75W and 100W cards respectively. The 7750 in particular is a standout thanks to the fact that it generally offers 5700 series performance on a sub-75W card, and even at $109 it clearly offers a great deal of value as an HTPC video card. All of this will be an even more welcome change when Cape Verde filters down to laptops in the coming months.
The problem for AMD today isn’t the power/performance curve, it’s the price/performance curve. 16 months ago AMD launched the Radeon HD 6850 at $179 amidst fierce competition from NVIDIA. Ignoring the current price of the 6850 for the moment, on average the 7770 delivers 90% of the 6850’s gaming performance for 90% of the 6850’s launch price. In other words in 16 months AMD has moved nowhere along the price/performance curve – if you go by launch prices you’re getting the same amount of performance per dollar today as you did in October of 2010. In reality the 6850 is much cheaper than that, with a number of cards selling for $159 before a rebate, while several more 6870s sell for $159 after rebate. The 7770 is so far off the price/performance curve that you have to believe that this is either a pricing error or AMD is planning on quickly halting 6800 series production.
Now to be fair there’s more to consider than just performance in existing games. The 7770 supports DX11.1, VCE, PowerTune, Fast HDMI, and other features the 6800 series doesn’t have, and it does all of this while consuming around 25W less than the 6850. But that’s just not enough. DX11.1 is a point update that’s still the better part of a year away and will only offer a tiny number of new features, while VCE is AWOL and cannot be evaluated, and Fast HDMI will be a niche feature for use with extremely expensive TVs for some time to come. This is not like the 4000/5000 series gap – today and tomorrow the 7000 series will only offer marginal feature benefits. The best argument for the 7770 is the power difference, but considering that both the 6850 and 7770 require external power anyhow that 25W difference is unlikely to matter.
The 7700 series is a fine lineup of cards, but AMD has finally shot itself in the foot with its conservative pricing. The 7750 can ride on the sub-75W niche for now, but the only way the 7770 will make any sense is if it comes down in price. Until then AMD’s worst competition for the 7700 series is not NVIDIA, it’s their 6850.
With that said, the 7700 series clearly has potential. XFX’s R7770 Black Edition S Double Dissipation does a great job demonstrating this with its virtually silent operation, while the card’s factory overclock largely closes the performance gap with the 6850. With its combination of performance and power consumption the 7700 series will be AMD’s midrange workhorse for 2012, of that there is no question. Now it’s simply up to AMD to make it so. After all there’s no such thing as a bad card, only bad prices.
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kallogan - Wednesday, February 15, 2012 - link
HD 6850 is still the way to go.zepi - Wednesday, February 15, 2012 - link
So basically in couple of generations we've gone4870 > 5770/6770 > 7770
Chip size
260mm2 > 165mm2 > ~120mm2 chip.
Performance is about
100 > 100 > 120
Power consumption in gaming load according to Techpowerup (just graphics card):
150W - 108W - 83W
And soon we should have 1 inch thick laptops with these things inside. I'm not complaining.
silverblue - Wednesday, February 15, 2012 - link
Good point. One thing I think people forget is that smaller processing technologies will yield either better performance at the same power, or reduced consumption at the same performance... or a mix of the two. You could throw two cards in dual-GPU config for similar power to one you had two years back, and still not have to worry too much if CrossFire or SLi doesn't work properly (well, if you forget the microstuttering, of course).cactusdog - Wednesday, February 15, 2012 - link
WHy is the 6770 left out of benchmarks?? Isnt that odd considering the 7770 replaces the 6770? I really wish reviewers would be independant when reviewing cards, instead of following manufacturer guidelines.Markstar - Wednesday, February 15, 2012 - link
No, since the 6770 is EXACTLY the same card as the 5770 (just relabeled). So it makes sense to continue using the 5770 and remind AMD (and us) that we do not fall for their shenanigans (sadly, many do fall for it).gnorgel - Wednesday, February 15, 2012 - link
For your 6850. It should sell a lot better now. Maybe they really stopped producing it and need to get rid of stocks. But when it's sold out almost anyone should go for a gtx 560, 7% more expensive and 30% faster.The only reason to buy a 7770 now is if your powersupply can't support it and you would have to get a new one.
duploxxx - Wednesday, February 15, 2012 - link
by the time the 6850 is out of stock the 78xx series are launched which will knock out 560don't understand what evryone is complaining about, its faster then the 57xx-67xx series, les spower. sure it's not cheap but neither are the 57-67 @ launch. Combined with old gen available and NV products a bit to expensive but this is just starting price....
akbo - Wednesday, February 15, 2012 - link
Moore's law apparently doesn't apply to graphic cards. People expectations do. People expect that every two years gpus at the same price point have double transistors and thus be faster by so. Obviously perf does not scale like so since the 28 nm shrink only has a 50% improvement from 40 nm. However that would mean a 50% improvement is expected. Imperfect scaling would mean a 40% improvement.So people expect that a card which is 20% faster than a card from 2 years ago to be 1.2/1.4 the price at launch, or an ~ 85% of the 5770 launch price in this case. That would mean that the card should retail at around $130-140 or so for the 7750 and sub-$100 pricing, like $90 or so. I expect it to be that price too.
chizow - Wednesday, February 15, 2012 - link
Moore's Law does actually hold true for GPUs in the direct context of the original law as you stated, roughly doubled transistors every 2 years with a new process node. The performance has deviated however for some time now with imperfect scaling relative to transistors, but at least ~50% has been the benchmark for performance improvements over previous generations.Tahiti and the rest of Southern Islands itself isn't that much of a disappointment relative to Moore's Law, because it does offer 40-50% improvement over AMD's previous flagship GPU. The problem is, it only offers 15-25% improvement over the overall last-gen performance leader the GTX 580 but somewhat comically, AMD wants to price it in that light.
So we end up with this situation, the worst price performance metrics ever where a new GPU architecture and process node only offers 15-25% performance increase at the same price (actually 10% more in the 7970 case). This falls far short of the expectations of even low-end Moore's Law observer estimates that would expect to see at least +50% over the last-gen overall high-end in order to command that top pricing spot.
arjuna1 - Wednesday, February 15, 2012 - link
DX11.1?? With only one true DX11 game on the market, BF3, there is literally no incentive to upgrade to this generation of cards 7xxx/kepler.Unless nvidia comes out with something big, and I mean big as in out of this world, I'll just skip to the next gen, and if AMD insists in being an ass with pricing, I'll go Ngreen when the time comes.
Now, the worrying thing is that it's becoming evident, both parties are becoming too cynical with price fixing, when is that anti trust lawsuit coming?