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Profilearkayn
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Message 37225 - Posted: 12 Mar 2010, 1:44:06 UTC - in response to Message 37118.  

Anybody got WU run times for the new HD5830 (s/b on list I believe also)?

Trying to decide if I wanna upgrade a HD4850 with one of these.


Talk to me tomorrow as that is when it arrives at my house.


Looks like I am running right around 2:10 per standard unit.

Or about 85 seconds faster than your 4850.
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Message 37230 - Posted: 12 Mar 2010, 4:15:00 UTC

arkayn, what is your card running at? Mine's at 840/1100 and seems to be running around 2:21 to 2:23/WU.

-Dave
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Message 37231 - Posted: 12 Mar 2010, 5:34:07 UTC

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Message 37240 - Posted: 12 Mar 2010, 12:46:06 UTC - in response to Message 37230.  

arkayn, what is your card running at? Mine's at 840/1100 and seems to be running around 2:21 to 2:23/WU.

-Dave


My card is running at stock speeds, but I do use the b-1 setting in the app_info.
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Message 37245 - Posted: 12 Mar 2010, 14:13:02 UTC

My main ATI card is running MW WUs in 3 minutes 35 seconds (2 at a time)
Go away, I was asleep


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Message 37246 - Posted: 12 Mar 2010, 15:04:06 UTC - in response to Message 37240.  

arkayn, what is your card running at? Mine's at 840/1100 and seems to be running around 2:21 to 2:23/WU.

-Dave


My card is running at stock speeds, but I do use the b-1 setting in the app_info.


Ah, ok. I wasn't even using an app info. I also notice you're 64 bit, my system is 32, could that account for any of it? In any case, put the app info in place set to run 2 tasks at a time, now they seem to be in the sub 2:10 range for tasks. I may try the b1 command in a while to see how it compares.

-Dave
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Message 37354 - Posted: 14 Mar 2010, 19:43:51 UTC - in response to Message 37111.  

Anybody got WU run times for the new HD5830 (s/b on list I believe also)?

Trying to decide if I wanna upgrade a HD4850 with one of these.

Hi,
yesterday i replaced my 4850 with a 5830.
Boinc message says: 4850 .. 1020 GFlops, 5830 .. 1792 GFlops peek.
It produces less noise and draws less power (a bit less).
I had troubles to install ATI CCC (Win 7 Home Premium 64Bit), but finally it works very well.

Alexander
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Message 37681 - Posted: 23 Mar 2010, 14:30:55 UTC - in response to Message 35846.  

ATI HD Radeon 4730 also supports double precision. This is my card and it is 100% works.
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Message 37711 - Posted: 24 Mar 2010, 1:38:27 UTC - in response to Message 37354.  

yesterday i replaced my 4850 with a 5830. Boinc message says: 4850 .. 1020 GFlops, 5830 .. 1792 GFlops peek. It produces less noise and draws less power (a bit less).
What's the utilization on the 5830 if it's drawing less power? ATI claims that card requires two 75W PCIe power connectors (vs. one for the 4850) and it peaks at 175W.
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Message 37725 - Posted: 24 Mar 2010, 17:39:25 UTC - in response to Message 37711.  

yesterday i replaced my 4850 with a 5830. Boinc message says: 4850 .. 1020 GFlops, 5830 .. 1792 GFlops peek. It produces less noise and draws less power (a bit less).
What's the utilization on the 5830 if it's drawing less power? ATI claims that card requires two 75W PCIe power connectors (vs. one for the 4850) and it peaks at 175W.


I have a power-meter connected between mains and my computer. It reports ~20Watts less power. I use no tuning, all at standard speed settigs.
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Message 37742 - Posted: 25 Mar 2010, 4:12:45 UTC

If you want to reduce your power draw you can do it quite easily by lowering your memory clock. For example I'm running my 4870 at 725mhz core(gets unstable if i push it to default 750 at lowest voltage setting), and 250mhz memory at 1.083 voltage (by using ATI Tray Tools). I tested higher and lower memory configs, and they didn't change anything in computation speed. Apparently 250mhz (still 32gb/s transfer rate) is more than enough for supplying the core with data. By doing this I was able to significantly reduce my load power draw, as well as load temperatures.
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Message 37797 - Posted: 27 Mar 2010, 17:14:33 UTC - in response to Message 37742.  
Last modified: 27 Mar 2010, 17:16:55 UTC

Yes Madhalo, you are quite right. Reducing GDDR frequencies in many tapes of graphic cards significantly reduces power draw and temperature. This is most usable for VGA wich has GDDR5. For example my VGA is Sapphire HD4730 512Mb 625MHz/3600MHz. Power consumption of my "stupid" VGA is more than 75W in idle!!! In idle state radiator is so hot that I can't touch it! Using ATI Try Tools v1.6.9.1451 I can easily change both GPU and DDR frequencies. This is the measurements of power usage of my PC (without monitor) in idle state/in boinc with active MilkyWay tasks/time to take for 1 task to complete:
1. 625MHz/3600MHz - 266W/340W/6m30s Default clocks
2. 625MHz/4000MHz - 275W/352W/6m35s
3. 625MHz/2000MHz - 232W/308W/6m15s
4. 625MHz/1200MHz - 220W/289W/6m01s
So we can see that reducing GDDR5 frequencies is important)) I can say the one thing. Sapphire and maybe even ATI are stupid brands! Because the power consumption in idle state vor my VGA is very big!! I can't find bios which can fix this problem. Because power consumption more than 50-70W in idle for non top VGA is a problem!
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Message 38315 - Posted: 7 Apr 2010, 19:53:42 UTC
Last modified: 7 Apr 2010, 19:54:07 UTC

Just a quick note, the rare HD4830 works great also.
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ProfileGary Roberts

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Message 38339 - Posted: 7 Apr 2010, 23:12:05 UTC - in response to Message 38315.  

Just a quick note, the rare HD4830 works great also.

It's already listed in the opening post of this thread.

Cheers,
Gary.
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Message 38349 - Posted: 8 Apr 2010, 0:27:41 UTC

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Message 38395 - Posted: 8 Apr 2010, 15:54:32 UTC
Last modified: 8 Apr 2010, 16:08:33 UTC

hello,

er is this all true ? or some sort of joke ?
i have a 4890 overclocked at 900 by 4400 standard cooled so noisy
if i just reduced the mem frquancy by half default or something the same work would be done as is being done now ?
only with alot less electricity alot less heat therefore alot less noise

so am i correct in thinking the GPU clock speed pretty much determins your work throughput and only overclocking that makes any differance

i come at overclocking video cards as a n newbie as for years i only ever overclocked machines the vodeo just had to sort of keep up with the system

and i know the more you bump the frequancy of your cpu/system up the more work it gets through i.e. my i7 920 with a modest clock of 4 gig across all cores and threads does a ton of work ( top 20 in climate prediction )

so is it just the frquancy that gets brought down and not the clock speed
if this is all true i'm amazed that its not alot more known about on this project or have i just completely missed the boat on this subject ( may very well be )

if anybody has any technical answers that would be great as i'm Founder of team " Scotland " and know a couple of others thinking the way i do

at present time of writing using standard app the wu are taking 2 mins 44 seconds to complete

best regards
Ian
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Message 38397 - Posted: 8 Apr 2010, 16:47:34 UTC

hi,

ok after some testing i found after dropping the mem speed to 2400 from 4400 the card worked fine but alot less noise and heat and electric i'm hoping

i left the gpu overclock as was i.e. 900

so my new question if the gpu clock is is left where it was and the mem clock is almost halved what performace has gone ?

i mean are manufacturers running these mem chips at speeds that are pointless ? or is it just this project which tends to show this up ?

best regards
Ian
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Message 38399 - Posted: 8 Apr 2010, 17:19:45 UTC - in response to Message 38397.  

or is it just this project which tends to show this up ?


Mem speed is relevant for all kinds of video (updating the video mem); this project depends mainly on gpu-speed. Decreasing mem-speed might result in problems when running hd-video full screen. When you do office work, you will see no difference.
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Message 38400 - Posted: 8 Apr 2010, 17:28:46 UTC - in response to Message 38399.  

hi,

thank you i will run some dvd's through it see if it stumbles if so will increase the mem freq until it stops
i dont use hd or blue ray disks so it shouldnt be to much of a problem
i'm also not a gamer so that helps

thank you for your quick response
Ian
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Message 38401 - Posted: 8 Apr 2010, 17:50:21 UTC - in response to Message 38397.  

i mean are manufacturers running these mem chips at speeds that are pointless ? or is it just this project which tends to show this up ?

It depends heavily on the workload. Milkyway is not sensitive to the memory frequency because it doesn't need a lot of bandwidth. That is different for other projects (like Collatz@home) or gaming especially at high resolutions.
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