Fantastic post RS.
This is one of the best-written, well thought-out posts I have seen here on AT. I agree with your analysis and I think you are spot-on..
Thanks!!
It should matter to enthusiasts to some extent, if for nothing else other than HEADROOM. Hawaii OCs like crap and GK110 overclocks like a champ.
Overclocking is not as simple as drawing a
direct correlation between temperatures and OCing headroom as you want to imply. It's a lot more complex than that. If you add the world's best water block and add max voltage to Hawaii, it still overclocks way worse than GK110 on air with minimal voltage control, even if you get R9 290X to run at 50-55C.
Average overclocks from HWBot:
R9 290X (default clock 1000mhz)
Air = 1145mhz
Water = 1196mhz (just 51mhz more), or less than 5% over air
Cascade = 1304mhz
LN2 = 1423mhz
GTX780Ti (default clock 902mhz)
Air = 1204mhz (!!!)
Water = 1369mhz (13.7% more than air)
Cascade = 1605mhz
LN2 = 1694mhz
As I said, temperatures are not the biggest limitation in Hawaii overclocking but something else is the bigger bottleneck. For example, electron-migration, transistor density/leakage, transistor composition/frequency scaling, etc. The average water overclock on GTX780Ti is almost as good as LN2 on 290X, and you know which one runs cooler under those conditions.
If Fiji comes along with water cooling standard and uses 265 watts under load, neato you got a 60 C quiet card taking up 4 spots that can't fit into many SFX cases and I can almost guarantee it won't have much headroom left. AMD will already be squeezing out as much as they feasibly can with regards to yield.
What 4 spots? This thread has countless examples of a 1x120mm radiator fitting inside miniITX cases. I am not sure why it matters to you specifically though because you would not purchase an AMD videocard so you aren't even the target customer. As I said already except for the 0.05% of PC gamers running Raven RVZ01 and RVZ02, almost anyone can fit a 1x120mm rad into a modern case if they really wanted to. A $100 NZXT 440 will fit 3x120mm rads and 1x280mm rad too. You think someone who can afford $1200-1300 on 2 of these cards can't afford to spend $100 on a new case? Give me a break.
Also, with regards to heat output, I remember back when Fermi hit the market and EVERYONE laughed off Fermi's temps and power draw, calling it a space heater.
This is 100% not true. A lot of people on our forum laughed at people who just focused on the reference designed 470/480 cards and these stubborn individuals that only focused on reference designed 470/480 cards were pointed out that after-market 480 cards are available and they easily solved the noise and temperature issues. I guess some people are just close-minded and only buy blowers. Please, don't make revisionist history because not everyone bashed Fermi. I bought 3 470s myself. The reason people laughed at Fermi wasn't because it used 275W of power, but because it used that much power for 15-18% more performance over a 145W 5870. It's the idea of so little extra performance for 90% higher power usage
while being 6 months late -- that's why people laughed at it.
Do you remember
anyone laughing at GTX780Ti's
278W-
286W power usage? Cuz that's what an after-market 780Ti uses. That card was very popular indeed and high-end enthusiasts purchased it in droves at $600-700. If you only want to use sub-250W cards, that's fine but don't make statements like 265W of power is some ludicrous amount when NV's flagship cards have used that much for years and years and sold like hot cakes.
Being inexperienced at the time with really high power use cards, I dismissed those arguments as well.
It has little to do with experience. If you were truly the target market for 250-300W flagship cards and 2-3 of those cards in CF/SLI, you wouldn't care much if your card used 250 or 300W of power as long as the performance, price/performance, VRAM, features, stability, etc. were there. You would need to buy a case, PSU, cooling system to accommodate >700W anyway and more if we include an overclocked i5/i7 CPU and monitor. That's why these are extreme systems not for everyone.
It's not anything against you, or anyone, but some people are obviously not the target market for these type of balls to the wall cards. Yet, plenty of people ran dual Titans, dual 290Xs, dual 780Tis, dual 580s, dual 7970Ghz overclocked, even triple and quadruple cards. People purchase cases to accommodate those setups, get WC, and so on. I don't know the size of the room your computer is located at. In my house, when my 7970s max overclocked ran at full load in the winter time the room temperature was still just 20-21C. In the summer time, my tower is placed right under a central air vent. When the central air A/C goes on which it would anyway because the humidity factor and 30C weather around the Great Lakes makes life without A/C unbearable, there is no impact to room temperatures. Obviously not everyone has AC or lives in cold climates, but if those individuals really wanted top-of-the-line performance, GM200 with 250W or 390X with 300W with near 970SLI level of performance is an amazing deal even from a perf/watt point of view, minus the SLI scaling issues. For those willing to go dual or more cards they would buy AC...it's that simple. Who spends $1000s of dollars on flagship GPUs but doens't have money for AC, a proper case, proper cooling? These cards aren't exactly targeted at a BestBuy $500-750 pre-build PC tower buyer.
It's just that YOU are not the target market for 500-750W CF/SLI setups and that's fine. But you are making it sound that 250-300W flagship cards are something new, which it isn't, by any means. A lot of high-end enthusiasts overclocked their 580/780Ti/7970Ghz/290X cards and all of those use > 250W in overclocked states.
But I was clearly wrong, My twin frozr GTX 465, despite running very cool and quiet, put off quite a bit of heat after an hour or two of gaming in a normal sized bedroom. Power draw matters, no matter how much you say it doesn't.
I think you missed my entire point of relative power usage. Did you not see when I said when a system already draws 400-450W+ of power, what's another 50-100W?
My LCD draws
210W at max power usage alone. My overclocked i5 for sure draws at least 150-160W with the motherboard. I am already at 370-380W before even counting a single GPU. Add 190W for a hypothetical after-market GTX980 GPU at peak, and my gaming rig
with the monitor with a super efficient modern NV GPU would dissipate 550W of power in the room.
Now do you think it matters if all my components draw 550W or 650W of power in terms of heating up my room? Think about that for a second. In the winter time in my office room 100W wouldn't make a squat of a difference. In the Northern US/Canada, it's pretty cold for 5-6 months out of the year. In the summer time, well the AC/central air is already on anyway, whether I would have had a gaming PC or not.
If you are talking about a 250W GM200 vs. a 300W 390X in terms of impacting your room temperatures due to extra 50W of power on what will likely already be a 400W overclocked i5/i7 system to begin with, you would need to start using the laws of thermodynamics and room volume to prove to me that my room temperature will be impacted
significantly.
Fiji is coming with cooler master heatsink.
Anyone knows of a good cooler master heatsinks for GPUs?
Does heat-sink mean air (non-water) cooling?
Supposedly it's Hybrid WC, with 1x120mm rad from either Asetek or CM.
AMD charged just $40 extra for a similar unit on an FX9590 at launch.
A single 1x120mm rad easily copes with > 300W of power usage at load.
It does matter to enthusiasts that run their cards at 100% load all the time. I do gpu crunching with BOINC and when I was running 290s the heat from those cards would make the room hot, I don't even want to discuss the heat from bitcoin/scrypt mining. With my 980s the room barely warms up. The difference is significant in this use case.
So how in the world did anyone on our forum run multiple overclocked 480s, 580s, 7970s, 780s, 780Tis, 290s, 290Xs as ALL of those cards use >
250W each in max overvolted/overclocked states?
Are you implying you will skip 250W cards this round? That's fine as no one forces you to buy GM200/390X but since Spring 2010, AMD's and NV's flagship cards used ~ 225-280W of power at load.
For any serious bitcoin miners, since the amount of $ that was made was so ridiculous on a
per card basis, the heat was 100% irrelevant. If you weren't greedy and didn't sell all your coins at once, a single path of HD4870/4890->6950/6970->7970->290 of non-stop mining made anywhere from $3,000-10,000 USD. That's just
1 card upgrade path. If you had 2 or 3 flagship cards from HD4870 days of mining when a single 4870 made > 1 bitcoin a day, then double or triple that value.
It's interesting to see how so many of you now think 265W of power is a lot. So what do you guys think GM200/390X should use? 185W? :hmm:
An after-market 980 already uses > 200W.
IF you guys are seriously complaining about 250-300W flagship cards, you are obviously not the target market for those products, and for sure not SLI/CF configs of them. Every single combination of flagship NV/AMD cards in the last 5 years used that much power when overclocked and it goes up in pairs. I don't know what exactly do you expect out of flagship products? That's why NV makes GTX970/980 for people who don't want 250-300W GPUs....why is this so hard to understand?