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
Theoretical Performance
Before moving on from compute performance, we wanted to quickly take a look at theoretical performance. Identifying the theoretical performance of the 7700 series in relation to other cards may help explain why it’s often trailing the 5770 and 6850.
A quick look at texture fillrates gives us our answer for the 7750: it has even lower texture performance than the 5750, never mind the 5770. Thankfully very few games are heavily texture bound these days – and if they were the 7750 likely wouldn’t have enough VRAM for them anyhow – but the massive gap in theoretical texture performance between the 7750 and7700 means that the 7750 is behind virtually everything else.
Conversely if you look at the pixel fill rate it’s almost identical to the 7770, which in turn trails the 5770. However in this case the 3DMark Pixel Fill test appears to be heavily memory bandwidth bound, which is why it trails the 6870 by so much.
Moving on, looking at tessellation performance is both good and bad for the 7700 series. With a maximum of 1 triangle/clock, GCN’s tessellation improvements can only do so much. It’s enough to vault past the 5770, but the 6870 still has better tessellation performance even with its lower clockspeed. Given AMD’s use of off-die buffering, it’s entirely possible we’re looking at a memory bandwidth constraint here.
Unigine Heaven backs these findings and then some. Tessellation performance is improved relative to the 5700 series, but at best the 7700 series is only going to catch the 6850.
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Oxford Guy - Wednesday, February 15, 2012 - link
What I'd like to know is why the 7950 is shown in the Idle temp charts and then vanishes from the Load temp charts.Oxford Guy - Wednesday, February 15, 2012 - link
Sorry.. Power consumption charts.I'd like to see the 7950/7970 load power consumption. The idle consumption is less interesting and that's where they're shown.
dananski - Wednesday, February 15, 2012 - link
Me too, the 6850 was worse than the 5850, so I'd expected it to be easily beaten by this generation's 770. Then again, the 6770 was just a 5770, so I suppose I should've learned that the mid-range is barely moving.designerfx - Thursday, February 16, 2012 - link
if you think about the fact of it's price today then it will probably be down substantially in a month - at which point it'd be quite competitive.ce12373 - Wednesday, February 15, 2012 - link
Hmmm. This AMD story sounds like a lot of other AMD stories (cough*cough "BULLDOZER"). Maybe no one has piledriven the point home to AMD yet. Oh well.medi01 - Wednesday, February 15, 2012 - link
Right, and it's a long time that nVidiai stopped producing overpriced "you can fry pancackes with these" GPUs and even hold performance crown? Oh, it's still producing them and AMD still hold performance crown? What a pity.Oh, but AMD went nVidia route with "confuse consumer more" naming scheme? How shameless, do they pay royalties for this to nVidia, the inventor of this rubbish?
aguilpa1 - Wednesday, February 15, 2012 - link
AMD has been doing the name bait and switch just as long as Nvidia but since your such a fan boy apparently you haven't noticed. It is obvious from your overheated GPU remarks that you are stuck on some ancient review of a past Nvidia product. And again, AMD has done the same, also in the past, 2900XT anyone?CeriseCogburn - Wednesday, March 21, 2012 - link
The GTX 590 still holds the single card crown.The very strange situation that has occurred is amd holding the single core card crown with 7970, finally passing the 580 after a year or closer to two and I don't remember how long.
This single core crown is gone already gone with the GTX680 benches leaked a few days early.
So amd finally did hold a crown for once in a very long time, for a very short time, 2.5 months or so....with most of that time in very weak or absent stock on retail shelves.
Spunjji - Thursday, June 21, 2012 - link
BLAH BLAH BLAH BLAH BLAHReticence - Monday, June 24, 2013 - link
You realize you're kinda the laughing stock of anandtech right? You wait with baited breath for every post remotely including AMD somewhere in the article to give you the opportunity to suck off nvidia and intel. I literally think you might need psychiatric help with that raging superiority complex, then again I've always thought there should be specially designed concentration camps for people like you who never grew out of acting like a blow-hard highschool kid.Oh well, down to business.
Two 7970's (And I mean two 7970's, NOT a 7990) perform better than one Titan, EVERY benchmark has shown it, you can not deny this. And I already know what you're doing to say "BUT THAT'S 2 CARDS VS. 1, NOT FAIR ;[" But see, this is the main point that proves you're a major fucking moron. That.does.not.matter.at.all.
The the Titan is 1000$.
Two 7970's are 800$.
And while yes, it's impressive that a single card can hold it's own against two, it doesn't matter, who is going to spend 200$ more for LESS performance? I'm sure you'll also say "you're just an AMD fanboy." Wrong, I just don't like to waste my money. And I really, really, don't like you.
Nuff said.
Oh and by the way, read it and weep, pussy.
http://www.semiaccurate.com/forums/showpost.php?p=...″