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STE\/E

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Message 44823 - Posted: 8 Dec 2010, 13:09:55 UTC - in response to Message 44814.  
Last modified: 8 Dec 2010, 13:10:48 UTC

Can an HD580, as the prime GPU, be crossfired with an HD4850?


Maybe a GTX 580 can but I don't know about a HD 580 ...;P
STE\/E
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Message 44827 - Posted: 8 Dec 2010, 16:13:16 UTC

^^
CF with two different GPU Generations is impossible, thats what i know.

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John Clark

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Message 44828 - Posted: 8 Dec 2010, 17:24:38 UTC
Last modified: 8 Dec 2010, 17:25:09 UTC

I should have posted ATI HD5850 and HD4850, but I suspect that some sussed my unconcealed mistake (like oldDirty).
Go away, I was asleep


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Sid

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Message 44840 - Posted: 9 Dec 2010, 9:34:05 UTC

Does anybody use ATI cards with passive cooling system ? For example, Gigabyte GV-R485MC-1GH ?
I'm currebtly using ASUS 4850 - too noisy for me.
Thanks.
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ProfileoldDirty
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Message 44841 - Posted: 9 Dec 2010, 10:10:45 UTC - in response to Message 44840.  

Wuy you dont replace the chiller with a silent from AC for example?
http://www.arctic-cooling.com/catalog/product_info.php?cPath=2_&mID=379
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Sid

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Message 44842 - Posted: 9 Dec 2010, 11:13:35 UTC - in response to Message 44841.  

Wuy you dont replace the chiller with a silent from AC for example?
http://www.arctic-cooling.com/catalog/product_info.php?cPath=2_&mID=379

Thank you. Good idea.
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ProfileoldDirty
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Message 44946 - Posted: 12 Dec 2010, 2:16:09 UTC

Oh aah "wuy" means why. ^^
This chiller from AC is really quiet, but it heat the voltage regulators more up than the org chiller, oc'ing is not recommended.
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Message 45058 - Posted: 16 Dec 2010, 5:31:49 UTC

I asked directly from AMD about the 6xxx series Double Precision calculation suport cos theres not clear yes or no enywhere...

So hopefully we all know soon for sure :)
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Jopi

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Message 45059 - Posted: 16 Dec 2010, 5:59:13 UTC

The e-mail didnt go true :( so no final answer is coming...
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ExtraTerrestrial Apes
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Message 45074 - Posted: 16 Dec 2010, 20:55:03 UTC - in response to Message 45058.  

I asked directly from AMD about the 6xxx series Double Precision calculation suport cos theres not clear yes or no enywhere...


68x0 don't have it, 69x0 does. Don't expect the smaller 6xx0 to support it.

MrS
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Message 45112 - Posted: 18 Dec 2010, 17:14:04 UTC

Hello people/
i have insert into PC ATI 4870x2 and 3870x2/
But BOINC crunching only on 4870x2 (
Can different family GPU work good on one PC?

Thank & Sorry 4 my bad english
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Message 45113 - Posted: 18 Dec 2010, 19:37:16 UTC - in response to Message 45112.  


Can different family GPU work good on one PC?

Yes, they can.
In most cases the problem is that only one card has a monitor attached. If this is the case you can simply solve this by plugging in a monitor or dummy-plug on the second GPU.
You need to restart BM.
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Message 45116 - Posted: 18 Dec 2010, 20:20:02 UTC

Yes needs monitor attached or dummy plug. Also your 3870x2 may need older driver to be recognised. A few posters here needed to use Catalyst 10.3 or earlier with HD 38xx series as more recent drivers would not work for them.
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terencewee*

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Message 45118 - Posted: 18 Dec 2010, 22:59:21 UTC
Last modified: 18 Dec 2010, 23:45:05 UTC

my firepro mobility m7820 is detected as HD5770 Juniper, but clearly a double precision part [http://developer.amd.com/gpu/ATIStreamSDK/assets/ATI_Stream_SDK_Getting_Started_Guide_v2.3.pdf].

any advice?

thanks.

win7-64bits, 6.10.58
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Message 45120 - Posted: 19 Dec 2010, 6:59:46 UTC - in response to Message 45118.  

Mobility FirePro M7820 is based on RV840 Juniper XT (Radeon HD 5770). As far as I know Juniper class GPU does not support double precision with current and previous Stream software. This suggests that the .pdf file you linked to may be incorrect in stating that it supports double precision. You will notice that the Mobility FirePro M5800 is also stated to support double precision even though it based on RV830 Redwood XT (Radeon HD 5670). This is also likely to be incorrect for all practical purposes with current Stream software even if double precision support is theoretically possible with some kind of emulation method.

If you look at Appendix A OpenCL Optional Extensions > A10 Extension Support by Device > Table A.2 Extension Support in http://developer.amd.com/gpu/ATIStreamSDK/assets/AMD_Accelerated_Parallel_Processing_OpenCL_Programming_Guide.pdf you will see which hardware supports CL_amd_fp64 and which does not.

For interest this shows that HD 38xx GPUs are no longer supported although they were supported in previous Stream software. This may explain why it is necessary for HD 38xx owners to use older drivers to enable support of Stream/CAL applications.
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Message 45123 - Posted: 19 Dec 2010, 11:14:22 UTC

As far as I know there is no mobile ATI / AMD GPU which supports DP. Feel free to email your notebook support and AMD about it - I think they deserve some critism for not being very forthcoming about DP support in mainstream chips (although the answer always tends to be "no" anyway).

MrS
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Message 45207 - Posted: 22 Dec 2010, 16:57:33 UTC

6970 runs around 25% than 5870 at same clock
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Dave

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Message 45215 - Posted: 22 Dec 2010, 22:08:31 UTC

I recently installed a GTX 460 in my AMD Phenom II X3 720 system with 260.99 driver. It works beautifully. As near as I can determine it's roughly 8X faster than CPU work.

Dave
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Message 45317 - Posted: 26 Dec 2010, 16:22:11 UTC

Nvidia GTX 460 has been completing work units very successfully for me here :)
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Message 45325 - Posted: 27 Dec 2010, 1:43:22 UTC

GTX 460 worked fine for me with the latest (260.99) drivers, however it does not work with the 259.22 drivers :\ (it might be worth noting Einstein@home will only send WUs to 260.00 or later)

This person with a GTX 480 and driver 258.96 appears to have the same problem (but hasn't noticed ;p): http://milkyway.cs.rpi.edu/milkyway/results.php?hostid=175924
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