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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mattgmann - Wednesday, February 15, 2012 - link
Don't forget, when the 4870 pricing was low, at the end of 2008, BOTH AMD and Nvidia were settling price fixing lawsuits. These companies have cheated before; they'll do it again.Hubb1e - Wednesday, February 15, 2012 - link
"Recessions are good for the rich... not so good for everyone else. "Really? So when the stock market lost 40% of its value and the rich lost 40% of their net worth, that was good for them?
The rich can ride out a recession better than the poor because they don't live paycheck to paycheck, but it sure as hell wasn't good for them.
Galidou - Sunday, February 19, 2012 - link
Maybe we can see 4870's with maximum performance/die size in mind pricing failure because it was performing close to the big die from Nvidia gtx2xx. Or maybe we can see the ''double performance from last gen'' tactic from Nvidia a fail when it means building a super big die with low performance/size ratio just to get that double performance motto... It was all a question of ''goal to attain'' from each company. One goal paid off more than the other that time.From an Nvidia's fanboy perception, the first will be true and the second unthinkable. From an ATI fanboy, the first will make no sense and the second will suit them well. From someone with no choosen side, both can be true.
But these 7770 and 7750 here, makes no sense, such small die with such performance for that price.....
Malih - Wednesday, February 15, 2012 - link
I agree, smells fishy, usually at this point nVidia would lower their card price.The latest price competitive part from AMD is the 6800 series. Probably have to wait for the 8800 series?
Kjella - Wednesday, February 15, 2012 - link
I know, I bought a 5850 before the MSRP hike for around $279 + VAT in 2009 and I just checked, it clearly beats a 7770 so a >$159 value today, maybe close to the $200 card being launched in March. The 6xxxx series I thought was just because they had to scrap the 34nm process and deliver essentially a refined 5xxx series, but now they're on 28nm and there's not much bang for the buck for those of us that already have a gaming card from the 4/5xxxx series. I hope this is just a temporary situation until nVidia gets their Kepler out, or I might just sit out another generation...eminus - Wednesday, February 15, 2012 - link
AMD has AMD (Accute Money Deficiency) right now so they need every penny they can gain.Cygni - Wednesday, February 15, 2012 - link
It seriously seems that the 4850/4870 was an incredible purchase. In 2009, you could get a 4850 for $99 dollars. And it STILL holds up to the top range cards.I mean we all know that Nvidia and AMD are playing the profit game 10 times harder than the performance game in this sector, simply because games can't press the limits of the hardware, but it's still impressive.
just4U - Wednesday, February 15, 2012 - link
I bought 4 cards in the 4x lineup..First a 4850 for $170, Second a 4870 for $199 Third a 4870 1G for $229 and lastly a 4830 for 140.. While I live in Canada I don't think prices ever came that low unless you got one helluva good deal.. $99 pricing for the 4850 wasn't the norm even late in its production run.
BPB - Wednesday, February 15, 2012 - link
I got mine real chaep at launch! BestBuy mispriced them. Still, not too much later there were good deals again and I got one for my daughter's desktop. These cards in CF still hold up well for 1920x1200 gaming. I would like to upgrade to better performance and lower power, but AMD is making that hard dollar-wise.Jorgisven - Wednesday, February 15, 2012 - link
Indeed. Best Buy had a 25% off all Visiontek cards the week of the 4850 launch, so I got mine at launch for $150. I then caught an amazing deal on a 4870 a few months later ($129 shipped), sold my 4850 for $140. I basically bought both for a net $140.I've been waiting for a good AMD card, but just haven't seen one. I've been tempted by the 560 Ti or 570, but they're still too expensive for my taste, and don't offer enough of an advantage to spend the cost of a PS3 on upgrading from an already decent GPU.
I'm rather disappointed with Red as of late.