35.5Mh/S w/Nvidia fermi 450 GTS -Update- 21.1Ghash?!

Xephan

newbie

Activity: 42

Merit: 0

Quote from: xurious on July 29, 2011, 09:03:10 PM

The reason ati's are faster for this specific mining work is that mining uses the SHA instructions (I think that's what it's called).

Pretty much it boils down to the nvidia card have to run a set of instructions (like say 4), where as the ati card can do it in 1 instruction.

So no matter what, until nvidia adopts openCL or gets some similiar instructions, they are going to suck balls at this.

nVidia has openCL but their hardware is lacking the 32 bit right rotation instruction, so they take 3 instructions to emulate.

Xephan

newbie

Activity: 42

Merit: 0

Quote from: kommykiller on July 29, 2011, 03:54:13 PM

http://i80.photobucket.com/albums/j168/ex_core/ghash.jpg

from 35.5Mhash to 21.3Ghash? With just 1 GTS 450 @ 1102Mhz?

Run it for 5 minutes than see how many shares is accepted according to your pool's webpage Wink

xurious

sr. member

Activity: 413

Merit: 250

The reason ati's are faster for this specific mining work is that mining uses the SHA instructions (I think that's what it's called).

Pretty much it boils down to the nvidia card have to run a set of instructions (like say 4), where as the ati card can do it in 1 instruction.

So no matter what, until nvidia adopts openCL or gets some similiar instructions, they are going to suck balls at this.

I would waste my money on 5970's. Pick up used 5870's for 200 apiece and use the leftover money to get a dedicated rig. Apparently with the new drivers you can run more than 4 cards in windows, so just get a board with a lot of slots and go to town...

jh1523

newbie

Activity: 56

Merit: 0

Nope, I've noticed it on nVidia cards as well. You can't decrease memory clock as you can on radeons - it impacts hash rate dramatically.

kommykiller

newbie

Activity: 14

Merit: 0

I increased my GPU rate from 783mhz to 1,102mhz
BUT
what changed my speed reading is - drop memory Mhz to 425mhz from 1800+mhz

Dropping the memory Mhz also seems to affect the shares in a VERY negative way... [but that could be a mis-report aswell?]

my estimated rewards is dropping too =S

Gabi

legendary

Activity: 1148

Merit: 1008

If you want to walk on water, get out of the boat

Lol, nice bug you found

Of course it's a wrong number! I wonder what you did to have it anyway lol

Do the number change?

kommykiller

newbie

Activity: 14

Merit: 0

http://i80.photobucket.com/albums/j168/ex_core/ghash.jpg

from 35.5Mhash to 21.3Ghash? With just 1 GTS 450 @ 1102Mhz?

kommykiller

newbie

Activity: 14

Merit: 0

I adjusted my GPU clock from 789MHZ, now running at 1,102Mhz [ram downclocked to 381mhz from 1800mhz]

My GPU is running colder now @ 1102Mhz, then 789Mhz!? maybe im going batsh^t

jh1523

newbie

Activity: 56

Merit: 0

Whatever you do, do NOT divide by zero!!

kommykiller

newbie

Activity: 14

Merit: 0

I did some teaking, now its reporting im processing 20Ghash?? is this a mis-report? holding at just over 20Ghash! Thats a huge jump from 34.4MH is it not?!

jh1523

newbie

Activity: 56

Merit: 0

In theory yes, but some motherboards don't allow all of the slots to be used at once. Check your manual (sometimes slots share bandwidth)

kommykiller

newbie

Activity: 14

Merit: 0

http://i.ebayimg.com/t/PCI-E-PCI-Express-Cable-1X-16X-Riser-Card-2U-1U-/00/$(KGrHqMOKnIE3bd!Rwj7BN9kZ(kuNw~~_35.JPG

Using 2 of these on my open 1x slots, and my 2x 16x slots, means I can have up to 4 GPU's on this machine?

Xephan

newbie

Activity: 42

Merit: 0

Quote from: kommykiller on July 29, 2011, 12:30:33 PM

Sweet, thanks alot that should help much, however what are extenders/adaptors to make it fit?

An extender/adapter has got a 1x (or 2x or whatever x) connector on one end so you can plug it into your motherboard's slot. On the other end, it's either an open end slot, or a full 16x slot so you can fit your graphics card into it.

This then allows you to use those shorter 1x/2x slots for mining purposes since mining does not require the kind of bandwidth actual graphics would.

kommykiller

newbie

Activity: 14

Merit: 0

Sweet, thanks alot that should help much, however what are extenders/adaptors to make it fit?

Xephan

newbie

Activity: 42

Merit: 0

Quote from: kommykiller on July 29, 2011, 12:08:17 PM

Indeed, I am very serious about mining, and am looking at ATI cards that can produce 24x the mhash performance of my card! According to the hardware comparision link that was posted - AMD/Radeon 5970 can produce roughly 700mhash/s! I may purchase 2, however I think I will have trouble with my current motherboard [M4N98TD EVO has nforce n980 chipset]. I may get an equivielnt with crossfire chipset!

I still have windows 3.1 on small dedicated HDD, never use it though unless i need a good laugh.

Cross Fire not needed for mining with multiple GPU Cheesy

So your old board should work just fine. They don't even need full 16x speed PCI-e slots, 1x would do just fine too although you might have problems fitting the card in without an adapter/extender.

jh1523

newbie

Activity: 56

Merit: 0

Yeah, I meant at a reasonable price not almost $900.

kommykiller

newbie

Activity: 14

Merit: 0

I have found several retailers still selling them, one example:
http://www.upgradebay.com/c1_itemdetail.asp?rid=22&itemid=169148783

jh1523

newbie

Activity: 56

Merit: 0

Yeah, about that - good luck finding any 5970s anywhere.

(also, you don't need a crossfire chipset. Even though I seem to remember that many nforce chipsets are in fact crossfirex compatible)

kommykiller

newbie

Activity: 14

Merit: 0

Indeed, I am very serious about mining, and am looking at ATI cards that can produce 24x the mhash performance of my card! According to the hardware comparision link that was posted - AMD/Radeon 5970 can produce roughly 700mhash/s! I may purchase 2, however I think I will have trouble with my current motherboard [M4N98TD EVO has nforce n980 chipset]. I may get an equivielnt with crossfire chipset!

I still have windows 3.1 on small dedicated HDD, never use it though unless i need a good laugh.

Gabi

legendary

Activity: 1148

Merit: 1008

If you want to walk on water, get out of the boat

Your speed is fine, 35 is what you get with your card.

My ATI 6950 make 315mhash/s without problems Cool

A 6970 goes over 400mhash/s...

Nvidia just epic sucks at Bitcoin mining, despite all their "gpgpu cuda etc etc" marketing.

You speak about 2001? Wow, any chance you still use Windows 3.1 btw? We are in 2011, ten years passed since then...

And no, Quadro and Tesla aren't significantly faster.

Topic: 35.5Mh/S w/Nvidia fermi 450 GTS -Update- 21.1Ghash?! (Read 3065 times)