1) Message boards : Graphics cards (GPUs) : NVidia GPU Card comparisons in GFLOPS peak (Message 40221)
Posted 13 days ago by Profile robertmiles
The single-width Galaxy GTX 750 Ti Razor is a new one on me!

My mobo has six PCIe slots, and with two double-width GPUs installed I have two spare single slots. Or perhaps I should sell my two GPUs and install six of these??!!

I don't find them on sale Stateside, neither amazon.com nor newegg.com, but amazon UK and France have them, albeit quite expensive.

Any experience of this GPU out there?


I have no experience with them, but something you should check: Is there adequate space between the single slots that all 6 cards can get adequate air for cooling?

Also, this card appears to be designed to blow air around within the case, rather than blowing it out of the case. Graphics cards designed that way tend to run hotter.
2) Message boards : Graphics cards (GPUs) : NVidia GPU Card comparisons in GFLOPS peak (Message 39497)
Posted 48 days ago by Profile robertmiles
Not sure about installing the GPU without using a 6-pin connector, but in theory it should work. Until you started crunching it would not need much power and you could always power cap it using MSI Afterburner (or similar) before launching Boinc.

You would need 2 free molex sockets for this,
http://www.amazon.com/StarTech-com-6-Inch-Express-Adapter-LP4PCIEXADAP/dp/B0007RXDDM/ref=sr_1_1?s=electronics&ie=UTF8&qid=1421399317&sr=1-1&keywords=molex+to+6-pin


That may be PART of a solution. There are no free molex sockets.

After writing my request, I decided to check newegg.com and found that they have enough variety in their internal power cables and adapters that I may be able to put together a five-part solution from items they sell, after I check the computer again to make sure what type of connectors are used on the hard drive power cables.
3) Message boards : Graphics cards (GPUs) : NVidia GPU Card comparisons in GFLOPS peak (Message 39489)
Posted 48 days ago by Profile robertmiles
Thanks. It looks like a GTX 750Ti is currently the best replacement for my GT440; anything higher would require a new PSU and would probably trip the circuit breaker frequently.

This may change when more 900 series boards become available.

Most GTX750Ti's have a 6-pin power connector, so while they are rated as 60W TDP I expect many can use more power, if it's available. What's actually observed while crunching is key. This may throw/skew the performance/Watt rating substantially. Different card versions are built & tuned by manufacturers in different ways, some aim for efficiency, some for performance and some for cost.

If you do go for a GTX750Ti make sure you get a 2GB version and keep an eye on it's power usage; you can always force the GPU to run at a lower clock to use less power.


Will a GTX750Ti (2GB) run without anything connected to the 6-pin power connector if I don't try to make it run faster than usual?

I bought one and tried to install it, but found that the computer doesn't have any power connectors that aren't already in use.

Do you know of any source of power cable splitters that would allow me to have a hard disk and the GTX750Ti share a power cable from the PSU? Probably also a few extenders for such power cables. Needs to be a source that will ship to the US.

Also, is there any comparison available for the crunch rates of a GTX750Ti and a GTX560? If the GTX750Ti has a high enough crunch rate, I'm thinking of moving nearly all my GPUGRID work to the GTX750Ti on one computer, and all my BOINC GPU work requiring double precision to the computer with the GTX560.
4) Message boards : Graphics cards (GPUs) : NVidia GPU Card comparisons in GFLOPS peak (Message 39310)
Posted 69 days ago by Profile robertmiles
Thanks. It looks like a GTX 750Ti is currently the best replacement for my GT440; anything higher would require a new PSU and would probably trip the circuit breaker frequently.

This may change when more 900 series boards become available.
5) Message boards : News : Happy holiday season (Message 39300)
Posted 70 days ago by Profile robertmiles
Unsent work units are running out. I really need to know what to expect because my computers will be left unattended during the break.


My advice is to pick another GPU project which is of secondary importance to you, like Asteroids@home, subscribe to it, and then set it to 0 priority. That way, BOINC will only take a work unit if GPUgrid is empty..


Asteroids@home is currently offline, and therefore not a suitable choice.

Poem@Home has both CPU and GPU workunits, and is a better choice based on what they do.
6) Message boards : News : Discontinued CUDA 4.2 (update) (Message 39159)
Posted 79 days ago by Profile robertmiles
I have not ran haven benchmark for 5 hours, but have run full benchmarks with no issues, as well as normal gameplay with no issues. The system does not become unstable until I start up BOINC client, as far as I can tell anyway


Suferbus,

I've seen a somewhat similar problem on two computers. On one, the graphics board fan was no longer turning, so the GPU quickly overheated after each reboot.

On the other, the GPU heatsink needed cleaning to prevent the GPU from overheating, but the graphics board cover could not be removed to allow this cleaning.

A program you might want to install to make it easier to see your CPU and GPU temperatures:

http://efmer.com/b/
7) Message boards : News : Discontinued CUDA 4.2 (update) (Message 39158)
Posted 79 days ago by Profile robertmiles
Hi Robert,

I tried to put together a comprehensive list of what is necessary to receive GPU workunits. You can either do step 1 and post back the results or take a look at your settings for steps 2-5 and see if anything needs to be changed.

- Happy crunching,
Steve

My previous reply to this message has disappeared. However, only item 4 below gave unexpected results.


4. Project preferences
http://www.gpugrid.net/prefs.php?subset=project
- Use NVIDIA GPU = on
- ACEMD short runs


I'm now getting both long and short 6.47 GPU workunits on this computer. However, all of them have the workunit repeatedly going unstable, and then failing with an unknown error message. In case it matters, this computer runs 64-bit Windows Vista.

Your message did tell me what to look for in order to enable CPU workunits but not GPU workunits on my other computer, though. The GPU heatsink on it needs cleaning, but is unreachable.
8) Message boards : News : New CPU work units (Message 39093)
Posted 87 days ago by Profile robertmiles
LAIM stands for "Leave application in memory"(while suspended) setting in boinc client under disk and memory usage tab.


It's on. However, I may have installed some updates and rebooted while the workunit was suspended.
9) Message boards : News : New CPU work units (Message 39084)
Posted 89 days ago by Profile robertmiles
Robert, was LAIM on?


What's LAIM? How do I tell if it's on?
10) Message boards : Graphics cards (GPUs) : PCIE3 card in PCIE2 slot (Message 39080)
Posted 90 days ago by Profile robertmiles
I'm thinking of upgrading my graphics cards, but first I need a piece of information I haven't been able to find online. How well do cards meant for PCIE3 slots work if placed in PCIE2 slots on the motherboard? Do they even fit in such slots, and so on? Going to a computer store and looking at the boxes such cards come in seems likely to provide that information, but is seldom practical for me.


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