Bitcoin Forum

Hey guys,

I just bought a 5870 and should have it Monday. What type of Mh/s has anyone experienced with this card? Iv seen a lot of variation (300~500). The person I'm buying it off of claims 500Mh/s.

Also the next few cards I want are going to be 5830's I think because they seem power efficient/cheap for the Mh/s output. Same question for those I guess. What type of power consumption and speed do we typically see with these?

P.s. the 5870 is sapphire.

I've consistently seen ~425 MH/s with my 5870s of various makes (Ref and non-ref)

Thanks! Any idea what wattage it draws?

Hi
I don't have a 5870 but my 5830 with motherboard and sempron 145, eats 200W (with a 80+ Bronze PSU) measured at the power socket. (about 50W is what the motherboard and processor eats so the card is around  150W in LTC mining 100% load, stock clock).

Great that's exactly what I was looking for. Do you get around 300kh/s?

Basically I have a GX650 80+ bronze and I'm hoping I can run my 5870 and two 5830's without upgrading that power supply. 650watts I'm hoping is enough. Should be somewhere around 1000hash and 650 watts. Seem reasonable?

for BTC: (over 350 MH/s)
--gpu-memclock 300 --gpu-engine 950

for LTC: (over 350 kh/s)
--scrypt --thread-concurrency 7200 --gpu-memclock 1250 --gpu-engine 930

these are obviously overclocked, but they are stable for me without any voltage modifications. your mileage may vary.

Thanks Grue, they seem to be the most efficient as far as energy vs output considering price. I want to build about 6 rigs on a rack and I think I'm going to go with these guys.

With my 5870's (a mixture or ref and non ref) all will clock to 1010/300 and net 450Mhash each.
As for power I think it is roughly 200w a card.
I run mine of a few 1300w sever psu's

really??? you need to do some tweaking im getting that at clock of 850
GPU clock 850
mem clock 1200
and a nice steady 358MH/s using GUIminer with -v -f10 -w256 tags

and as the way things go proof if one needs it :D [Mod edit: spam link removed]

low memory = less heat, less power consumption.

mmmm 1x 5870 and 2x 5830 on a GX650, I don't think so, you will kill your psu, the 5870 eats more, unless you use lower settings.
I get about 235 MH with GPU: 800Mhz, mem: 500 mhz, in BTC and 220 Khash in LTC (in LTC i have to use mem in 750Mhz in order to get more Khash)

I could probably get 300 MH at 925Mhz but the card's VRM are already way too hot for my taste at stock clocks to OC it.

I have no experience playing with VRM voltages of these cards, but I have read than lowering voltage will reduce power consumption, however in another thread clearly says: "don't play with voltages if you don't want to fry your card" so, I stay with stock voltages for now hehe

5830's draws nearly as much power as 5850's, 5830 is a 5850 but with less transistors or some shit. Probably best to get 5850's.

Do some research.

https://en.bitcoin.it/wiki/Mining_hardware_comparison