Statistics For Radeon 7870 Please?

[LewiesMan]

Hi Again!, Well, It looks Like I'm On The Hunt For A New GPU I saw A Radeon 7870 at An SA Online Store (http://evetech.co.za) for about 2700 ZAR.
That's Just over 260 USD - Well, I checked The Bitcoin Wiki, and all there Is Next To This Particular Card Is... (No Info whatsoever) So If Any Fellow Miners Have any experience with this card... please Let Me Know(Mhash/s etc) Thanks.

[crazyates]

A 7970 gets ~550MH/s @ 1000MHz with 2048 SPU

A 7870 only has 1280 SPU @ 1000MHz, so that equals about 343MH/s. You could prolly hit 400Mh/s if you OC'd a good bit.

[Aion2n]

Hi Again!, Well, It looks Like I'm On The Hunt For A New GPU I saw A Radeon 7870 at An SA Online Store (http://evetech.co.za) for about 2700 ZAR.
That's Just over 260 USD - Well, I checked The Bitcoin Wiki, and all there Is Next To This Particular Card Is... (No Info whatsoever) So If Any Fellow Miners Have any experience with this card... please Let Me Know(Mhash/s etc) Thanks.

Mining hardware comparison

[gigica viteazu`]

so a 5870 (@930 i get 420Mh/s) it`s still better that 7870... damn!

[crazyates]

so a 5870 (@930 i get 420Mh/s) it`s still better that 7870... damn!

Those 5xxx series cards were amazing for mining. IIRC, the architecture was almost perfect for mining. Even a 6970 can barely get over 400MH/s.

The main performance gains of the 7970 (anywhere from 550-700MH/s) was from the lower die size (28nm), which means more cores at lower power and less heat.

[fankih]

My 6970 was getting 430Mhash/s @ 960MHz / 150MHz and now I'm getting 440MHash with 1000MHz/300MHz 5870

-fankih-

[DrG]

I picked up 2 Diamond Black Overclocked 7870s and bumped the voltage to 1.25v and was able to get about 440 MH/s out of each one stably.  They are using significantly more power than stock - but they're decent for density.

[crazyates]

I picked up 2 Diamond Black Overclocked 7870s and bumped the voltage to 1.25v and was able to get about 440 MH/s out of each one stably.  They are using significantly more power than stock - but they're decent for density.

Overvolting is typically a bad idea, as your VRM temps will be extra hot 24/7. Unless you're watercooling, watch those VRM temps.

And 440MH/s is about what my 5970 did on stock volts. So again, not really a huge improvement.

[lologarithm]

I run a 7870 right now. It runs about 240W @ 395mhash/sec. A tiny bit of overclocking and I run about 425mhash/sec.

[LewiesMan]

Thanks For All The Replies! However... I just Pre-Ordered My 3-Ghash/s Asic Device From Butterfly Labs! I Hope It Was A "Wise"
Investment... Thanks again anyway. (Can't wait until October!)

[Shadow383]

Thanks For All The Replies! However... I just Pre-Ordered My 3-Ghash/s Asic Device From Butterfly Labs! I Hope It Was A "Wise"
Investment... Thanks again anyway. (Can't wait until October!)

October of which year?

[sveetsnelda]

A 7970 gets ~550MH/s @ 1000MHz with 2048 SPU

A 7970 gets 597MH/s @ 1000MHz with 2048 SPU

[AndrewBUD]

Not cards are identical..... Jim's 7970 might get 550mh/s and Dick's 7950 might get closer to 600mh/s @ the same clock speeds.....



I have a few identical 5800 series cards that don't mine exactly the same.....

[crazyates]

Not cards are identical..... Jim's 7970 might get 550mh/s and Dick's 7950 might get closer to 600mh/s @ the same clock speeds.....



I have a few identical 5800 series cards that don't mine exactly the same.....

No, he's right. I was thinking of a 7970 getting ~550MH/s @ the stock 925MHz. 1000MHz does give just under 600Mh/s.

[Dum3]

Just got a sapphire HD7870 OC version.

First thing i noticed ASIC quality of 85.2%,which is pretty good in my book.Also default voltage shown was 1.164 instead of standard 1.208.

The sweetspot seems to be 1100@1.056V,multimeter and vddc reads 1.006,temps are 65C@stock cooling,vrm is steady at 75 degrees C,lowered a bit the fan so basically the card is DEAD silent.

Currently i get 405Mhash/s @1100.Will try new clocks next days.I think i got a pretty decent clocking card. 

[crazyates]

That looks pretty good! I always love an overclock that goes with an undervolt 

What's your power draw at the wall?

[Dum3]

I don't know honestly,but the other components are an i3 2100 undervolted to 1.00V  a SSD and some low-voltage ddr3 ram at 1.35V.My power supply is a seasonic x-650 at it;s fan does not spin most of the time,so i guess the whole package is around 200w from the wall.

[ssateneth]

0% stale? I'd like to know what pool you're mining at please.

[Aion2n]

Just got a sapphire HD7870 OC version.
First thing i noticed ASIC quality of 85.2%,which is pretty good in my book.Also default voltage shown was 1.164 instead of standard 1.208.
The sweetspot seems to be 1100@1.056V,multimeter and vddc reads 1.006,temps are 65C@stock cooling,vrm is steady at 75 degrees C,lowered a bit the fan so basically the card is DEAD silent.
Currently i get 405Mhash/s @1100.Will try new clocks next days.I think i got a pretty decent clocking card. 

Added to the Mining hardware comparison.

[meebs]

I have two Gigabyte 7870s OC'ed to 1175 with 1231 voltage in afterburner and they get 435 m/hash 24/7.

running them in a corsair 400r case and temps are about 74/63 (ambient 25).