Any GeForce 660/660 Ti Speed Theories?

[BlockheadBrown]

I thought I saw someone post that the $299 660 Ti might be only 10-15% slower than a 670. Does anyone else have any thoughts regarding this?

 

[JohnnyChuttz]

It will be slower than a 670, that's all I know

 

[Crap Daddy]

I'd say less than 10% below the 670. Otherwise it doesn't makes sense. It has to be faster or at least on par with the 7950.

 

[Skurge]

12-15% slower than 670.

 

[Durvelle27]

http://www.game-debate.com/news/?news=1809&game=None&title=Nvidia Launch The GTX 660 Ti in August

 

[BlockheadBrown]

I'd be better off with the 7950 3GB.

 

[Joseph F]

I'm going to guess that it will be slightly slower than a 7950, all-around, and significantly slower than a 7950 when driving a high-res/multi-monitor setup.

However, these probably won't be huge issues, as it's aimed at the midrange market, where people probably won't be running $600+ in monitors, and it will be a lot more power efficient than the competing 7950. Therefore, making it suitable for SFF/low-power gaming rigs.

 

[JTsyo]

Do we know if the 660 and 660Ti is coming?

 

[lehtv]

I'd expect 7870 speed, a bit faster maybe

Do we know if the 660 and 660Ti is coming?

Yes, we know they're coming but we don't know when

 

[Arkadrel]

Well... lower clocks speeds, less bandwidth (~ -25%).

The 7950 is about 15% slower than a 670....
So Im guessing the 660 is gonna be 10-15% slower than the 670, so it can compete with the 7950.

That way the 660 ends up around 300$, and offers about same performance & value as a 7950.
My guess is ~5% faster than a 7950, for same ish price point giveing you same value reguardless of which way you go.

 

[tviceman]

It will have 25% less memory bandwidth, less ROP's, and and 6 out of 8 SMX's enabled (the gtx670 has 7/8 and gtx680 has all 8 running). If core clocks are around gtx670's range, then it will should end up about 15% slower at 1080p. Faster than an hd7870, but just a tad slower than an hd7950. Power consumption will favor the hd7870 over this card, but performance in most situations will favor Nvidia.

If Nvidia releases a 256-bit, 6 SMX GK104 card, that would have a nice little kick to it, giving it much of the same speed differences between the gtx460 768 and gtx460 1 gig.

 

[jacktesterson]

I'm guessing 7870 range speed. From what I've seen, it will probably sip power and be slightly slower compared to a 7870. My theory.

 

[f1sherman]

Faster than GTX 650 Ti , slower than GTX 670 , duh...

Launch MSRP $200-$329

And since we are at predictions...
Anyone knows what happened with you_know_whose prediction about Kepler
being fast via PhysX block. Being faster than Tahiti, but only in NV sponsored games;
elsewhere slower than Pitcairn.

Was he bamboozled or what?

 

[tviceman]

Faster than GTX 650 Ti , slower than GTX 670 , duh...

Launch MSRP $200-$329

And since we are at predictions...
Anyone knows what happened with you_know_whose prediction about Kepler
being fast via PhysX block. Being faster than Tahiti, but only in NV sponsored games;
elsewhere slower than Pitcairn.

Was he bamboozled or what?

What happens is he makes outrageous claims about stuff, then when he ends up being way off base he says the articles he posted were full of fake information he made up to see what other sites try to steal / feed off his articles. It's all a bunch of BS, the guy is a sensationalist - worthless one - with an obviously targeted agenda, and says things just to get page hits.

 

[RussianSensation]

I am going to guess that $249 GTX660 = GTX580/7870 while $299 GTX660Ti will be faster than an HD7870 but slower than a 900mhz+ HD7950.

I'd be better off with the 7950 3GB.

With 860mhz GPU clock, HD7950 is within 10% of the performance of a stock 670/7970 at 1080P:

At 1025mhz on the core, it comes very close to a GTX680:

So even if GTX660Ti has 800mhz HD7950's performance:

1) Will it have 2-3GB of VRAM or 1.5GB of VRAM?
2) Will it have 30-40% overclocking headroom?
3) How good will be the quality of GTX660Ti's PCB/reference cooler?

HD7950 at 1.1ghz on the other hand will be basically as fast as a stock GTX680. Not bad for a $310 card!

 

[RussianSensation]

Update

Supposed GTX660Ti specifications leaked:

I have no idea how they retained 32 ROPs and 192-bit memory bus since I thought there are 4 blocks x 8 ROPs, each tied to a 64-bit memory controller.

 

[ShintaiDK]

I have no idea how they retained 32 ROPs and 192-bit memory bus since I thought there are 4 blocks x 8 ROPs, each tied to a 64-bit memory controller.

Same as 550ti. Its doable. You basicly suffer performance penalty on some parts of the memory.

Also ROPs aint linked to the memory bus.

 

[RussianSensation]

Also ROPs aint linked to the memory bus.

Are you sure? I think for NV it might be.

"Similarly, the organization of the ROPs has not changed either, as the ROPs are still broken up into 4 blocks of 8, with each ROP block tied to a 64 bit memory controller and 128KB of L2 cache. Altogether there are 32 ROPs, giving us 512KB of L2 cache and a 256bit memory bus." ~ Anandtech's GTX680 Review

 

[tviceman]

Update

Supposed GTX660Ti specifications leaked:

I have no idea how they retained 32 ROPs and 192-bit memory bus since I thought there are 4 blocks x 8 ROPs, each tied to a 64-bit memory controller.

With as many cuda core as the gtx670? Weird.

 

[Crap Daddy]

They have been selling this very same card for $500 and $400. Now at last, after some good millions made they are selling it at the price point it was meant for in the first place.
The 6$$ series. One chip fits all.

 

[bigsnyder]

I think some of you are over estimating what this card will do. As always, time will tell.

 

[ShintaiDK]

The specs looks wrong. Going from 256bit bus to 192bit with the same amount of memory and everything else the same. 20W less? Should basicly be same.

Rumours tends to suck, they only fuel random useless forum chatter, hate and broken hopes

 

[Arzachel]

They have been selling this very same card for $500 and $400. Now at last, after some good millions made they are selling it at the price point it was meant for in the first place.
The 6$$ series. One chip fits all.

Yeah, true.

Except that GK100 R&D wasn't free. And the months they've gone without a midrange 28nm product, aka the things that sell. And that they'll be losing money either due to having the things yield so badly that they have enough defective chips, or because they will have to fuse off the execution units on working chips, because GK106 can't cut it.

You're not making sense in the least.

 

[Anarchist420]

It will have 25% less memory bandwidth, less ROP's, and and 6 out of 8 SMX's enabled (the gtx670 has 7/8 and gtx680 has all 8 running). If core clocks are around gtx670's range, then it will should end up about 15% slower at 1080p. Faster than an hd7870, but just a tad slower than an hd7950. Power consumption will favor the hd7870 over this card, but performance in most situations will favor Nvidia. If Nvidia releases a 256-bit, 6 SMX GK104 card, that would have a nice little kick to it, giving it much of the same speed differences between the gtx460 768 and gtx460 1 gig.

That got me thinking... that they're going to make a 24 ROP/192 bit 660 non-Ti with 6 SMXs and a 32 ROP/256 bit 660 Ti with 6 SMXs. Either that, or they're going to make the number of shaders per cluster a power of 2 and have 1024 CUDA cores... that would require a new design, however, and would also have to mean that some GK104s had such poor yields that too much voltage would be required to make them work and be marketable.

It would make sense that the Ti would have the same number of ROPs. The yields on the CUDA cores are much lower, or so I would think.

Still, 32 ROPs that can only do half speed RGBA16 blending is quite weak in addition to the crippled CUDA double precision performance for the price.

 

[KompuKare]

The specs looks wrong. Going from 256bit bus to 192bit with the same amount of memory and everything else the same. 20W less? Should basicly be same.

Rumours tends to suck, they only fuel random useless forum chatter, hate and broken hopes

Well memory speed, bus and amount must make a power difference. But I don't recall seeing any competent site (basically anyone who measures graphic card draw rather than total system draw) doing a proper comparison...

Even sites like ht4u.net who do proper power figures for their reviews forget to say at what voltage the ran; for instance I was looking at their HD7850@1200 vs 7950@1060: only 20W more but no voltages :-(

Anyway, one other factor might be the PCB and power circuitry:
so while an over-engineered board (say 7970 @ able to OC from 200W to 350W) might 'waste' High% of power;
a board with little room (say a reference GT670) might 'waste' Medium% in power;
and finally a board purposefully under-engineered so as not to damage sales of more expensive card (Gt660) might as a result be super-efficient and only 'waste' Low% of power.

Although even all of this speculation would probably not account for 20W unless the core voltage is reduced too.