HD 4770 Previews/Reviews

[ryboto]

There is sofar only 1 site that shows those low idle modes. All the rest dont. If a HD4770 uses 25-30W idle then alot of cards should be about 10W or below 0W....

Also there aint any 2D mode with Vista/Windows7.

yes there is a 2D mode...do you not own a card that throttles down? my HD3870 throttles it's mem/gpu clocks even in Vista.

Hexus shows the 4770 using ~12W more than a 4670 in idle, which puts it around 27W idle. Anandtechs numbers are strange, since I don't recall ever seeing a 4850 idle lower than a 9800GT. Techreport has it idling what, 15W more than a GTS250, so maybe that's around 40W?

also, silentpcreview found the card to idle around 28W, and load between 50-60W depending on the stress test they used.

[Mats]

Its certainly not using 25-30W idle. Its more like 50-60W idle and 70-80W load.

Well show me ONE site that have measured the idle power draw of the card, and not the whole system, and got more than 50 W. Unlike xbitlabs and silentpcreview, that is.

[Manicdan]

you could show the wattage of using the onboard video, then drop in the card and compare the two. its not perfect. but its probably only off by 5w

[Manicdan]

edit: not sure how but i posted in the wrong topic, weird

[ryboto]

you could show the wattage of using the onboard video, then drop in the card and compare the two. its not perfect. but its probably only off by 5w

That's basically how SilentPCReview estimates power draw.

[XmikeX]

I'm not too concerned about "dumping heat" inside the case... so.. the following link applies..

http://www.xtremesystems.org/forums/...0&postcount=17

Come on, SingleSlot 4770.. go go go.

XmX

[W1zzard]

i just measured: 29.5 W in idle. card only. windows vista


3dmark03 nature

furmark: ~75 W

[Mats]

Thanks W1zzard! Is that including the power that goes through the slot?

[ryboto]

i just measured: 29.5 W in idle. card only. windows vista

3dmark03 nature

W1zzard! Awesome! Have you tried underclocking the RAM in 2d and seeing what kind of a difference in power draw it makes?

[W1zzard]

Thanks W1zzard! Is that including the power that goes through the slot?

yes thats including slot power

W1zzard! Awesome! Have you tried underclocking the RAM in 2d and seeing what kind of a difference in power draw it makes?

a lot .. give me a few seconds to test

800 = 31.58W
700 = 29.88W
600 = 28.20W
500 = 26.40W
400 = 24.84W



assuming it's linear, that would be below 20W at 100 MHz

[Manicdan]

i just bought a killawatt meter since summer is coming up, and i somehow use 11KW a day average living by myself.

this is dumb, but is it possible for AMD to have drivers, where it turns off the main video card, and uses the onboard video? kinda like a laptop does. i know its a bit off, but i could be an insane boost to idle power savings if they could pull it off. and their future goal is fusion, so youd think AMD mobo + ATI video card could work together if they wanted.

[W1zzard]

this is dumb, but is it possible for AMD to have drivers, where it turns off the main video card, and uses the onboard video?

yes its called nvidia hybridpower and probably patented

i somehow use 11KW a day

11 KW isnt the proper unit. do you mean 11 kWh in a 24 hour period? or 11 kWh each hour in a 24 hour period?

[v_rr]

Its certainly not using 25-30W idle. Its more like 50-60W idle and 70-80W load.

FAIL:

[Manicdan]

yes its called nvidia hybridpower and probably patented



11 KW isnt the proper unit. do you mean 11 kWh in a 24 hour period? or 11 kWh each hour in a 24 hour period?

yeah i know my units, didnt know spelling it wrong would have someone point it out. so i also know that it translates to either of the 2 extremes,
100Wh at 24/7 use, and 1800Wh (1700 additional) for the 5 hours im awake and at home OR
450Wh at 24/7 use, and nothing additional for when im home.

i think im closer too: 300Wh 24/7 and 1000Wh (700 additional Wh) when im home. i know the circiut breaker for the most of the Apt will trip at 15A, (TV + PC + either A/C or vacuum). i always leave on one light for the pets, (2x 18W bulbs) and the fridge is on, then its just my PC thats left on. if i turn it off i can save probably half on my electric bill, 35-40$/month savings

[Mats]

this is dumb, but is it possible for AMD to have drivers, where it turns off the main video card, and uses the onboard video?

ATi have such technology, but they only use it for laptops.

[W1zzard]

Power and energy are frequently confused in the general media. Power is the rate at which energy is used (or generated). A watt is one joule of energy per second. For example, if a 100 watt light bulb is turned on for one hour, the energy used is 100 watt-hours (W·h) or 0.1 kilowatt-hour, or (60x60x100) 360,000 joules. This same quantity of energy would light a 40-watt bulb for 2.5 hours. A power station would be rated in watts, but its annual energy sales would be in watt-hours (or kilowatt-hours or megawatt-hours). A kilowatt-hour is the amount of energy equivalent to a steady power of 1 kilowatt running for 1 hour, or 3.6 megajoules.

for all who were wondering

[ryboto]

assuming it's linear, that would be below 20W at 100 MHz

Awesome, good to know! brings it close to my 3870 in idle. Is it possible to set dynamic memory clocks? I heard there were issues with that and GDDR5.

[naokaji]

yes its called nvidia hybridpower and probably patented

At the risk of getting offtopic, do you know if they ever fixed it to no longer require a reboot for the change?

[W1zzard]

Awesome, good to know! brings it close to my 3870 in idle. Is it possible to set dynamic memory clocks? I heard there were issues with that and GDDR5.

memory clock change causes flickering. ati decided not to implement it for this reason because customers would think their card is broken. the state switches can happen mid-game any time the gpu senses it does not need the highest clock state

At the risk of getting offtopic, do you know if they ever fixed it to no longer require a reboot for the change?

no idea. i never looked at it or used it. just remember stuff from the nvidia brainwash sessions.

[Lightman]

yes thats including slot power



a lot .. give me a few seconds to test

800 = 31.58W
700 = 29.88W
600 = 28.20W
500 = 26.40W
400 = 24.84W



assuming it's linear, that would be below 20W at 100 MHz

And this is at a constant V!! Imagine if GDDR5 would be undervolted at the same time as GDDR3 can be!

BTW great job Wizzard

[ryboto]

memory clock change causes flickering. ati decided not to implement it for this reason because customers would think their card is broken. the state switches can happen mid-game any time the gpu senses it does not need the highest clock state

So, the best thing to do would be to use a 3rd party software to manually control the switching? Would such software override CCC?

[Splave]

whats some good drivers for these win xp and 7 ?

Seem to really be under performing with the 9.5 betas from xfx

[Mats]

You can get 9.5 from AMD.

http://support.amd.com/us/gpudownload/Pages/index.aspx

[acos]

I wish the idle power results from xbitlabs were true but no! i have tested my rig with 4770 and without. from 68w idle without the card to 119w with 4770.
you make the maths, over 40w difference there. disabling the IGP hadn't any effect at all! but i believe that AMD chipsets 780,790 can effectively use
hybrid power with this card as well. i will test it and inform about results. under load HD4770 has no opponent, i measured my rig to 200w! it is even working with a 300w PSU

[ryboto]

I wish the idle power results from xbitlabs were true but no! i have tested my rig with 4770 and without. from 68w idle without the card to 119w with 4770.
you make the maths, over 40w difference there. disabling the IGP hadn't any effect at all! but i believe that AMD chipsets 780,790 can effectively use
hybrid power with this card as well. i will test it and inform about results. under load HD4770 has no opponent, i measured my rig to 200w! it is even working with a 300w PSU

That seems like a lot, I have a higher drawing card, and a quad core, and I only draw ~190W at the wall under full system load. Regardless, the 4770 reference designs seem to be unconsistent. Did Xbit get a special card?