It’s built on the same 55nm process as the HD 38x0 series and is a lot more complex so it’s not surprising that it consumes more power. But weren’t AMD talking about 10W at idle for the HD 48x0 series! Either they screwed up or the current drivers aren’t supporting the down-clocking at idle yet; fingers crossed that it’s the latter.ryboto wrote:tis a bit odd.drjunk wrote: Jeez....Even the gtx280 burns less power when idle...
Dont understand...hd4850 10w idle @ 68c
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That's what I was referring to when I called it odd, it should be throttling down a bit lower than what the reviews are reporting.smilingcrow wrote:It’s built on the same 55nm process as the HD 38x0 series and is a lot more complex so it’s not surprising that it consumes more power. But weren’t AMD talking about 10W at idle for the HD 48x0 series! Either they screwed up or the current drivers aren’t supporting the down-clocking at idle yet; fingers crossed that it’s the latter.ryboto wrote:tis a bit odd.drjunk wrote: Jeez....Even the gtx280 burns less power when idle...
Well here's a review of the 4850 by Anandtech showing around 27 watts higher than the 3870 at load, but with a large increase in performance IMO. It seems like ATI has a pretty decent card on their hands, stepping up the competition, especially in the prices...I love capitalism.
http://www.anandtech.com/video/showdoc.aspx?i=3338
http://www.anandtech.com/video/showdoc.aspx?i=3338
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What were they reporting the idle clock speeds to be? The voltage also needs dropping for a significant reduction in power to be achieved I assume!ryboto wrote:That's what I was referring to when I called it odd, it should be throttling down a bit lower than what the reviews are reporting.
Performance is good for the price and the wattage so it’s only the idle power draw that disappoints.chahahc wrote:Well here's a review of the 4850 by Anandtech showing around 27 watts higher than the 3870 at load, but with a large increase in performance IMO. It seems like ATI has a pretty decent card on their hands, stepping up the competition, especially in the prices.
nVIDIA has announced the 9800 GTX+ which is a 55nm GPU so will likely compete closely with the HD 4850 in the performance per watt stakes. The idle power draw of the GTX 200 series is surprisingly low so it’ll be interesting to see if they manage to make the 9800 GTX+ more competitive in that department.
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Mounting holes are the same as the HD38x0 series.FartingBob wrote:I wonder/hope. Will the 4850 have mounting holes for my Accelero? Or is this just a day dream? This cards power consumption makes it a possibility for passive, or low speed fan at most.
If not, i hope AC get around to making a new version!
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Fantastic, well thats pretty much sealed the deal for me then!rpsgc wrote:Mounting holes are the same as the HD38x0 series.FartingBob wrote:I wonder/hope. Will the 4850 have mounting holes for my Accelero? Or is this just a day dream? This cards power consumption makes it a possibility for passive, or low speed fan at most.
If not, i hope AC get around to making a new version!
The current drivers do not seem to lower neither voltage nor clock for the HD4850 by a really significant amount: http://www.techpowerup.com/reviews/Powe ... 50/21.htmlsmilingcrow wrote:What were they reporting the idle clock speeds to be? The voltage also needs dropping for a significant reduction in power to be achieved I assume!
HD3850/HD3870 had both lower idle voltage and frequency (and higher load voltage with higher load frequency).
Seems a bit odd that the "low" and "medium" power settings would be the same, so I guess there's some room for improvement. No idea though if this will actually materialize...
So, does that mean that a ZM-GWB3850/3870 will fit on a reference 4850??? If so that'd be perfect for my Reserator 2! I just don't want to take the risk of buying the card and cooler if it's not going to work.[b]rpsgc[/b] wrote:Mounting holes are the same as the HD38x0 series.[b]FartingBob[/b] wrote: I wonder/hope. Will the 4850 have mounting holes for my Accelero? Or is this just a day dream? This cards power consumption makes it a possibility for passive, or low speed fan at most.
If not, i hope AC get around to making a new version!
Google hasn't been much help so does anyone know if the 3850 and 4850 layouts are effectively identical?
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how the hell is this french moron getting that much wattage draw in general???? his 3870 system shouldnt be breaking 280 watts.Matija wrote:Or not, if this preview is correct:
http://www.hardware.fr/articles/724-2/p ... -4850.html
But who knows, maybe it was a different system...
eh?
Don't know where you got that but my vanilla manually OC'd 3850 idles at 52C and the fan spins at the minimum.loimlo wrote:3850's reference single slot cooler had the similar situation, 65'c, at idle. It looks like ATi implement the same temperature-controlling mechanism on 4850 as well. Anyway, I wonder whether 4850 enjoy the same quiet cooler design as 3850 that has been verified by silent authority, SPCR.
I'm confused like many others but of the fact that the 4850 manages to draw almost as much as a 9800GTX under load. 9800GTX has TWO pcie connectors and the 4850 only one. Something is definately off here. Unless the other pcie connector on the 9800GTX is useless. I don't think AMD would risk it on one connector if the draw could peak higher than it's capable of.
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I remember reading news of TSMC finalizing 45nm technology....or that they do have the capacity to do it, but it will probably take some time to validate it for a complex GPU.Shadout wrote:still?drjunk wrote:Is the 40nm shrink still on for the end of the year? I think im going to hold on till then and get a 40nm version.
Have they ever mentioned a 45 (or 40) nm shrink?
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Everything I’ve read points to them being extremely similar although in one photo one of the RAM chips looked as if it was spaced slightly wider than on my HD 3850. Not sure if that would be a problem anyway.cd8uk wrote:Google hasn't been much help so does anyone know if the 3850 and 4850 layouts are effectively identical?
Even if the 9800 GTX is only 10W over what a single 6 pin connector + PCIe slot can provide it would still need the second connector (or possibly a single 8 pin connector) so you can’t use that as an accurate yardstick. The second connector also gives headroom for over-clocking.Scoop wrote:I'm confused like many others but of the fact that the 4850 manages to draw almost as much as a 9800GTX under load. 9800GTX has TWO pcie connectors and the 4850 only one. Something is definately off here. Unless the other pcie connector on the 9800GTX is useless. I don't think AMD would risk it on one connector if the draw could peak higher than it's capable of.
Ye, they do, but I think they have said it wouldn't be before 2009.ryboto wrote: I remember reading news of TSMC finalizing 45nm technology....or that they do have the capacity to do it, but it will probably take some time to validate it for a complex GPU.
Maybe they surprise us, but tbh, I believe those waiting for die shrinks might end up waiting for quite a while.
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There's almost always a video card refresh around Dec/Jan. I am going to bet that's when the process switch will occur. Either then, or maybe Oct/Nov. Depends on when Nvidia decides to attempt the 280 on 55nm. Maybe Ati would react and do the same, only with 45nm? They'll do it, and they'll do it quick if the yields are better and cost is lower.Shadout wrote: Ye, they do, but I think they have said it wouldn't be before 2009.
Maybe they surprise us, but tbh, I believe those waiting for die shrinks might end up waiting for quite a while.
Thing is that NVIDIA desperately need to shrink GT200 from stupidly large to plain large, whereas ATI don't need to shrink RV770 given how small it is already.ryboto wrote:There's almost always a video card refresh around Dec/Jan. I am going to bet that's when the process switch will occur. Either then, or maybe Oct/Nov. Depends on when Nvidia decides to attempt the 280 on 55nm. Maybe Ati would react and do the same, only with 45nm? They'll do it, and they'll do it quick if the yields are better and cost is lower.
In any case they're playing in different markets - the NVIDIA shrink of interest wrt RV770 is probably G92b (AKA 9800GTX+) which has already happened ... in the sense that it exists even if you can't quite buy it yet.
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The problem with the 9800 GTX+ is that it doesn’t have the power saving features of the GTX 200 series which means its idle power consumption is higher than that of the HD 4850. At least that’s what the early reviews are showing although it’s possible that new drivers might improve the situation for both platforms.
It’s good to see nVIDIA finally addressing their high idle power consumption with the new GTX 200 series. With a board that supports Hybrid Power you could feasibly run an SLI GTX 280 system with a low power draw at idle. Good job as the power draw at load is still fairly monstrous.
It’s good to see nVIDIA finally addressing their high idle power consumption with the new GTX 200 series. With a board that supports Hybrid Power you could feasibly run an SLI GTX 280 system with a low power draw at idle. Good job as the power draw at load is still fairly monstrous.
9800GTX+ should support Hybridpower, shouldn't it? 9800GTX did so what's different? Drivers? Were the tests on HP-capable motherboards?
TBH I think that for both IHVs performance is 98% and idle power 2% of their attention span, and with the recent releases the caca has hit the fan on the performance front so it wouldn't surprise me at all if these vaunted power-saving features don't work quite right yet.
TBH I think that for both IHVs performance is 98% and idle power 2% of their attention span, and with the recent releases the caca has hit the fan on the performance front so it wouldn't surprise me at all if these vaunted power-saving features don't work quite right yet.
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It’s very likely that they tested with an Intel platform and I’m not sure if Hybrid Power motherboards have been released for Intel systems yet; they haven’t for non SLI systems anyway.nutball wrote:9800GTX+ should support Hybridpower, shouldn't it? 9800GTX did so what's different? Drivers? Were the tests on HP-capable motherboards?
But regardless you still need to know the normal power draw as most people don’t have a motherboard that supports Hybrid Power.
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Replace stock thermal goo. There.johnniecache7 wrote: Problem with the HD 4850 is it runs way to hot loads in the 90s. I doubt anything cool it passively but Thermalright's T-Rad with slient 120mm fan will cool it silently I bet. I wouldn't count on any the older coolers like the S1 doing the job very well.
And what exactly has the stock cooler's temperature to do with the cooling performance of the S1?
There's a "hotfix" driver version 8.6 out for the 48xx range, in case you haven't tried it already.
http://support.ati.com/ics/support/defa ... onID=35298
http://support.ati.com/ics/support/defa ... onID=35298
4850 stock cooler VS Accelero S1johnniecache7 wrote:I wouldn't count on any the older coolers like the S1 doing the job very well.