A good review:
http://lab501.ro/placi-video/asus-ra...870-si-hd-6850
http://lab501.ro/wp-content/uploads/...ks-580x132.jpg
Printable View
Another review:
HD6850 crossfire @950/1132
http://www.kitguru.net/components/gr...rex-review/21/
HD6870 crossfire @950/1140
http://www.kitguru.net/components/gr...rex-review/21/
Gigabyte GTX 460 SOC is on newegg at 219$,http://www.newegg.com/Product/Produc...82E16814125345Quote:
I know the 460GTX beats the stock clocked 6870 when overclocked (FERMI scales very well with clocks). And I know the 6870 overclocks very well. My question is, how well does the 6870 scale when overclocked?
815/4000, 0.4ns memorys, 6+2VRM phases, 5870 cooler, a good choise at the middle.
It can go beyond 6870 stock performance...
http://img514.imageshack.us/img514/5480/lp2e.jpg
http://lab501.ro/wp-content/uploads/...10-580x385.jpg
6850 in crossfire, overclocked, likely is the best buy this decade.
I think that Asus Directcu is good also for little overvolt:
http://tpucdn.com/reviews/ASUS/Radeo...agescaling.gif
But I prefer Gigabyte HD6850 :)
http://www.pureoverclock.com/images/...6850_temps.jpg
Everyone can't wrong with a pair of HD6850 or GTX460 1GB overclocked for 350$. I just waiting some HD6950/HD6970 bench and choose before Christmas ;)
Radeon 6850 could run fine with 6870 BIOS
http://www.guru3d.com/news/radeon-68...ith-6870-bios/
"For those of you excited about the possibility of 'unlocking' your HD 6850, it's not going to happen; the disabling is done at an ASIC level, not BIOS."
(http://www.rage3d.com/reviews/video/...view_addendum/)
Gigabyte has a 6850 custom pcb, dual fan windforce, just like GTX 460 OC cooler. Price is as reference, 179$.Quote:
seems OCed 6850 offers good value compared to OCed 6870
lets find what manufacturers have add better cooler for 6850 without increasing price much
http://www.newegg.com/Product/Produc...82E16814125348
http://www.gigabyte.com/fileupload/p.../3614/3517.jpg
xdan, it looks good.. as usual, it itched too much in my hands and did click order button on a cheapest card which was available :D gigabyte seems be slow coming in stock in Europe.
if it was me, i would rip those fans off and put some strong case fans on :D
indeed crossfire 6850 is very good buy. the same class in 5970 or better ;)
It performs 50% better than last gen's midrange and is priced like a midrange card. And I'm sure the GTX460 was more than $200 before the price cuts; it's only now that it has reached better value simply because of the 68xx release. If anything, the precipitous price war that occurred over the past 2 days is nothing short of miraculous.
I don't get why everybody is insisting to use these stupid "open" coolers.
Almost all GTX 460 have been using different type of stupid coolers too. I was hoping they would find a better solution in this round. Why they keep insisting on duping hot air inside the case?
On the contrary, an OCer needs a cool case, not Joe. If you OC you CPU and RAM, then you don't want hot air from GPU inside your case.
Why would a OCer want the hot air inside the case, when you can easily dump it outside. Specially on these "cool" GPUs, you don't need to sacrifice the case-temp for a good 24/7 OC on these GPUs.
If you pay attention, I'm not saying they are inefficient or bad coolers for GPU. They dump the hot air inside the case, and limits the OC on your CPU, RAM, and toast you NB, SB too.
I'm saying why they insist on dumping the hot air inside. Why can't can't they find a better design and keep using the same stupid one?
depends on what case you are talking about ;) open case is another thing.
if one is handy, it is possible to do own closed case for graphics cards. though cooling perfomance might suffer a bit..
-
ram? no problems. running corsair h50/70 inverted? (blowing air from inside) why not..
as I said, it is not for joes.
If you have a good ventilated case( i mean with 3-4 12cm fans) you don't have any problems... Even if you don't have such a ventilated case, at stock volts, any GTX 460 doesn't warm anything. An doesn't limit any overclock on Cpu, let say 4ghz on an i5 750, or 4.4ghz on an i3. I suposed that if you have money for an i7 you have money for a good case too..
You just exagerate. :down:
Are you trying to say, a hot case is the same as the cold case?
I don't know how much you know about OCing and cooling, maybe i need to explain.
Hot air from these stupid "open" coolers has sevral disadvantages:
1-Hot air gets sucked in by those big fans, and heats up you GPU too. So it's debatable if you get a cooler GPU.
2-You NB and SB are really closed by, and they get toasted.
3- Hot air will limit your OC on CPU, for sure, and would affect your RAM-OC too.
Better case-ventilation needs more fans, and it means more noise, and we should try to eliminate the source of heat for 24/7 first, and then add more fans.
Who cares, pro's use watercooling anyways :p:
Edit: 24/7 not LN2 pro's ofc...
We all know we need a cool case, for sure. But some are insisting that it's OK with hot air.
These GPU treads (both nVida nd AMD) has a tendency to become arena for claims and insisting on "rumors", I know. But lets keep it real, you don't want hot air inside your case.
bah, I don't upgrade very often at all, how long until I can double my HD4870 performance for the price I paid for it (£125), hadn't been particularly keeping up with the speculation but I was expecting these to be a bit stronger...I guess it's all about competition
open coolers give you better noise to temp ratio, if you can get the hot air out some other way.
just simple pros and cons
1. The air is cooler than the PCB of the graphics card -> the PCB and surface mounted components release heat energy to the flowing air and become cooler. As the PCB is cooler, it radiates less heat energy to the rest of the case. Also, as the PCB is cooler, more of heat generated by GPU will be conducted to the PCB and GPU cools down.
2. As the NB and SB are close by and the graphics card PCB is cooler and the open cooler provides airflow, NB and SB cool more efficiently than with leafblower cooler design.
3. A few degrees of fluctuation in CPU temperature limit your OC? If so, I'm sure you don't pay attention to stability too much then.
4. Take a physics course.
That can be true, if you can get the hot air out without more fans/noise. That's a big IF.
There is fine line here. That hot air will get sucked in and heat up your GPU too, so how can you be so sure that your GPU will run cooler/quieter?. What you can say for sure is: it will damage the CO-headroom for all other components, and this means you need more fans/noise.
The whole discussion started by, why can't they find a better design to eliminate disadvantages of dumping the hot air inside. So, your point is valid, but how do you get that hot air out of your case without more fans/noise? Wasn't it better if those stupid coolers could somehow dump it out by themselves?
1. You don't have hot air with 3-4 12cm fans, well pozitionated, they will suck fresh, cold air from outside the case, and exhaust the hot air.Quote:
1-Hot air gets sucked in by those big fans, and heats up you GPU too. So it's debatable if you get a cooler GPU.
2-You NB and SB are really closed by, and they get toasted.
3- Hot air will limit your OC on CPU, for sure, and would affect your RAM-OC too.
Better case-ventilation needs more fans, and it means more noise, and we should try to eliminate the source of heat for 24/7 first, and then add more fans.
2. P55/H55 for example don't have NB and ICH10R on 45nm is a small and cold chip. And also applies p. 1.
3., see p. 1 for Cpu, and if we speek about DDR3 memorys, DDR3 memory is very cold compared to DDR2 so no problem.
4. There are 1200-1300RPM fans with 21-26db noise, so there are very silent, silent than your VGA.
Open cooler are in VGA industry from many years, is not as they introduced them, now.
It's not about cooler , it's more about TDP card, a GTX 480(TDP 250w) open cooler produces much more heat, a GTX 460(TDP 160W) produce a little. And you not judge that even with EE cooler you dump heat in case because PCB is hoter, and it heat the air in case, to.
With an open cooler you have lower temperatures of the pcb.
Sam_oslo, you don't keep the gpu load to 100%all time, 24/7, you use him only when you play games...In idle the voltage of Gpu lower from 1.0v to 0.875v, i have with my GTX 460(Gigabyte-windforce), 35C in idle, lower temperatures than on cpu with stock cooler.
And the heat will vanish when you don't play games, so your sistem will not increase in temperature forever. Temperature into the case will lower to normal in idle periods.
For an user with so many posts, you speak nonsenses. GTX 460 isn't 8800GTX...or 9800GX2....or GTX 280...Quote:
Please try to keep it real, and on topic, and tell me why do you want that hot air inside the case when a good cooler could dump it outside?
And you are offtopic, too...this thread isn't about vga coolers. Evga has some GTX 460 external exhaust cooler models(EE), buy that to be with peace in your mind.
You guys are trying to ell me that it's OK to have hot air inside the case.?
I gotta admit you both are good at going around the point. Please try to keep it real, and on topic, and tell me why do you want that hot air inside the case when a good cooler could dump it outside?
Next time try to respond to the arguments please, and don't "go around the point".
If you understood the basics of thermal physics and thermodynamics, you would understand that flowing warm air is better than cool still standing air around components, as long as the air is cooler than the components. Leafblower design delivers absolutely no airflow to the rest of the case, while open cooler provides airflow all around the case, depending on the orientation of the cooler.
It is far more important to have more airflow than cooler air for passive components like VRM, RAM, SB and NB. Thus put, open cooler isn't only more efficient at cooling, but in most cases can also provide additional cooling to other components too. Though, it is true that because of higher ambient temperature in the case, actively cooled components will most probably see higher temperatures by a few degrees. However, in practice it has no difference in OC-ability.
Actually I've studied physics in university, and you are right, airflow is good, but, (and it's big BUTT :moon:) as you said, it has be cooler than those components, not hotter!. Look at this temps and tell me you want this to flow on your components, OK?
http://www.pureoverclock.com/images/...6850_temps.jpg
You want air flow, bot not from GPU or CPU-exhausts, you want fresh air flow!
I agree with this.
Here's an example.
Open case with lots of ventilation, but not much airflow
vs.
Large case with less vents, but more directional airflow.
We just upgraded my fiance's case from a RAIDMAX Sirius to an NZXT Phantom, and even though it looks like the RAIDMAX case would cool better due to nearly the entire case being vented/mesh, it didn't. The Phantom has a definite direction to all the airflow in the case, and because of that, every component is 3-8C cooler than it was in that other case.
Thermodynamics are an interesting topic, but I agree; free-standing cool air is never better than moving, slightly warmer air.
As an addendum, I think GPU heat should be exhausted out of the case as quickly as possible. There is not a single other component in the computer that generates more heat than a high-end video card. Putting that heat back into the case is ONLY a bad idea if your case doesn't have a lot of airflow. If it does have a lot of airflow, though, it shouldn't make much of a difference.
I'm sure only the air in the immediate vicinity of the core area is actually around 90 C. It will diffuse (terminology?) rapidly into the surroundings. Disregarding flux of the heat into other sinks, if you simply draw a sphere radiating from the back of the GPU you see that the volume where the heat has to spread goes as the cube of the radius. The temperature should drop as the cube of the distance from the 90 C back of the PCB, as temperature is related to the amount of local heat.
So:
Passively cooled components lose heat by having it diffuse from the sink into the air. Conduction by air is terrible because air is actually not very dense at all, and heat is carried by collisions between air molecules (density of air is ~ 1.5 kg / m^3). Moving air increases the amount of collisions. Also, as hot air tends to expand and diffuse the heat throughout as much area as possible (to reach equilibrium), at the very least you're promoting convection to remove deadspots.
http://img130.imageshack.us/img130/9...cn0336y.th.jpg
Uploaded with ImageShack.us
I got pIII era case, im not noob tu buy new loud with 10 noisy fans and light material case for 50-100 euros...
Check pict.
I did dome light mod to my case i use 2 fans to blow hot air out. Thats psu and some smaller back fan, bouth are low rpm.
Then i open up slots for cards that may coold air come in to my gf9800gtx, so now as you may see on pict. Gf suck in cold air and blow it out.
Whats rest of air, it cool dowm anything else, i got heatpipes allover mainboard.
3 Hard drives as coled down same way cold air blows in, and cool them down
All working wery good and stable.
Remember hot air gows up it self
Cold air stay down
£104 for a 5830 comes close.
Damaged box stock but guaranteed card
http://www.aria.co.uk/Products/Compo...roductId=42098
Thats GPU temperature, and if the GPU was the ONLY source of heat energy to that array of fins in the cooler, the exhaust air could NEVER reach the GPU temperature. Hence the exhaust air is far from being as warm as the GPU.
Actually, it would be a miracle if the exhaust air was even near the temperature of the cooler fins. Which itself should be as warm as the base of the heatsink, which itself should be as warm as the heatspreader, which itself should be as warm as the GPU die etc. GPU temperature has very little to do with exhaust air temperature, especially if talking about open GPU coolers.
Of course there's possible problem with graphics card VRM cooling depending on the orientation of the cooler etc.
Stop with the off topic guys... Come on.
My northbridge temps went up a few degrees after I slapped an HR-03GTX onto my GTX280. This was in a Antec 1200 loaded with 1300rpm Yate Loons.
It was worth it for the drop in temps on the gpu itself but I don't know that would be the case in a case without really good airflow.
Thats just what I saw.
That said I want a non reference 6870 with an open cooler.
i just built a case in a briefcase (see it under the water cooling worklogs), and it has ONLY 1 fan in and 1 fan out. the cpu gets the coldest air since AMD chips are very touchy to temps, the gpu gets the spare cpu heat, and the psu pushes out the rest to where the hard drives are and the exhaust. my OC was not in any way limited because of this setup. AND if it open the top which is right above the GPU, the temps GET WORSE. cause theres no pressure remaining to force air out. when running furmark and prime my temps are 38C on cpu, and 82c gpu after a half hour. yes other things got hot, but that wasnt affecting anything i needed since 25C vs 40C isnt hurting the NB, RAM, or whatever else can be OCed.
The air coming from those open sink graphics cards mostly gets blocked by its own PCB, so very little of that actually blows onto the cpu/NB, and the SB rarely needs extra airflow. It just lingers around and heats the case up
There is no reason not to have external exhaust with graphics cards - results in cooler case temps, as well as cooler intake temps for the graphics card itself
Some people like myself go without a case entirely or use open air test benches for 24/7 use. As such the top->down air flow coolers are superior to the ones that try and force hot air down a narrow channel and through some tight slots at the PCI bracket. It is up to the consumer to purchase a card with the right cooler for their situation and blanket generalizations don't do anyone any good when everyone benefits from having their choice of either design from manufacturers.
XFX 3D ad:
http://www.youtube.com/watch?v=rG4klFf2cqk
6870 meant to replace 5770? is that true cause i watch reviews in youtube by motherboardsorg
Hmmm n if i hadn't read the reviews i would assume that 6850>5850 and 6870>5870 which is far away from truth, why the like to confuse people?
So, are there any eyefinity results out for the new cards yet???
I have an Antec P182 case with 6 x 12 cm fans in total - 2 for intake, 2 on the CPU, and 2 for exhaust. All the fans are completely silent 1200 RPM coolermaster ones.
I have used many graphics cards and custom coolers on my cards in this case, and open fansink coolers have ALWAYS conclusively provided around 10-20 degrees lower GPU temps than exhaust blower coolers, unless I set the exhaust blower RPM speeds to very noisy levels.
My current MSI Cyclone 460's are cooler and quieter than my previous 5770s were with stock cooling, plus my 5770s were cooler and quieter after I replaced the stock coolers with some Zalman fansink based ones.
Exhaust blower coolers are TERRIBLY inefficient, hotter, and LOUDER than simply having a decent case with lots of silent fans and open fansink coolers on your graphics cards.
The only part of my PC that makes a bit of noise is the CPU cooler which has a more moderate RPM when the CPU is being stressed. Other than that I can easily hear when the VGA coolers are making noise, and exhaust blowers make a lot more noise than anything else.
Most fansink based coolers, especially MSI's cyclone perform as well as an exhaust blower running at 4000 RPM, but the fansinks remain completely silent while the blowers sound like hairdryers.
To be honest, after using my current cyclone GTX 460s, I no longer want to buy any video card again, ATI or Nvidia unless it has this or a similarly decent cooler on it. Reference AMD VGA coolers are rubbish, especially when overclocking. On ATI cards, Sapphire's Vapor X coolers are the best ones you can get, but I also only want MSI or Asus branded cards for the warranty covered voltage tweak and overclocking.
Calmatory's posts on the previous page explain exactly why this is. Open PCB graphics cards with a fansink design stay far cooler than crappy plastic shrouded exhaust fans.
Absolutely anyone would think that without first checking the reviews or card specs. However I think that the reason is that the 4700 / 5700 / and maybe 6700 ranges are meant to be 128 bit interface cards.
4770 and 5770 are both 128 bit cards with much lower Rop numbers. The 6850 and 6870 are 256 bit cards with 32 rops, just with a lower shader count than the 5800 series cards.
the roadmap is only for 2010. And they said lower end GPUs in the 6k family will come at the beginning of 2011, only the high end for 2010.
Hey, are you this guy?
http://www.youtube.com/watch?v=4w7eP...layer_embedded
Any intelligent person will always research a product before they buy it. One review of the 6870/6850 shows where it's positioned at in the market.
Anyone that buys on blind faith.... well, that's the consumers fault.
Summary of Reviews:
http://gpudesign.bafree.net/amd-rade...eviews-summary
3Deye
very usefull, thanks :up:
looks like it should be a nice upgrade from my msi 5770, just have to decide between the 6850 or the 6870.
Im leaning towards the 6850. Oc'd it should offer a better bang for buck then the 6870.
Am i right? What would you guys get.
I'll admit that one has me a bit surprised... I mean, getting one set of 3d glasses to work across 3 screens with a single pair of glasses would be rather difficult to synchronize the shuttering of the glasses I would assume. On the technical side of things that has to be a nightmare.
They were using Zalman Trimon 3D monitors, setup on the left side (under sign "AMD HD 3D"):
http://www.in4.pl/recenzje/665/187.JPG
Though you can see a similar setup in action here better:
http://pclab.pl/zdjecia/artykuly/veg...creens_jpg.jpg
Yep, HD 6850 non reference seems the right solution for your upgrade need. Just wait a bit, i think this time AMD got plentiful supply from TSMC, and with the heating up price war, in one month time you could get it for even cheaper than what's available now, or atleast get more choices/alternatives. Heck, if all things turn positive, we might get a non reference OC ready HD 6870 for less than US$ 200 sooner than later. :up:
Techreport's review shows that the 6870 is on par with 5870 in all the games they tested.
Check this out
XFX 6850 Black Edition
Glad i picked up a XFX 6850 from the egg last evening.
well the question is will it really be 220$, or like 200ish.
if theres less noise and better overclocking, it sounds it could be worth an extra 20-25, but not 40$.
but if you can get a reference, add on a big ass cooler for the same price, and get the same overclock, might aswell do that instead.
i also kinda just wish the 6870 had more headroom, make it fun.
Where are the 2GB editions?
I have a 5850, and virtually any game at 5760x1200 needs to have textures set to medium and AA off.
AMD breaks it's own naming scheme with the 6870
http://www.semiaccurate.com/2010/10/...g-scheme-6870/
Charlie's thoughts on the renaming scheme. I can't believe my own thoughts mimic Charlie exactly down to the reasoning. The world must be ending.
IMO they should have been 6830 and 6850 instead of what they are called in terms of their performance compared to the last gen.
(6850 should be 6830, and 6870 should be 6850).
Yea:
http://benchmarkextreme.com/Articles...%202GB/P2.html
1 Gb is a fail for 2560x1600 and Eyefinity setups.
1 Gb is plenty on the 6800s because those are cards for 1080p res.
I hope they don't sit on the 2gb cards for awhile like they did with the 5800s. Barring fancy RAM availability, they should offer those suckers at a price premium starting day one when the margins are nice and big.
scary... :(
http://img530.imageshack.us/i/2cmq6aw.jpg
maybe GDDR5 6gbps density isnt that great...
How successful were the eyefinity editions? The general consensus I thought 3 monitor gaming can be good, 6 monitor gaming is never good. In addition you needed substantially more power than a single 5870 to really get decent graphics on six monitors.
I definitely think cayman xt should have more than 1gb of ddr5 if the price is over 400 dollars. These cards sound like they really have the power to drive eyefinity, it would be a shame to be held back by memory.