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1  Economy / Goods / 4x 5830's on: June 24, 2011, 06:37:09 AM
Wanting to sell 4 Sapphire 5830's

two are Brand New, never been used. Other two are used, have been used for just over 2 weeks.

The two cards have been overclock to 1030/300 but ran at 38C-40C

All original boxes, wrapping, CD, Manual and 2x 6pin Power Adapters.

Serious offers, please PM me.

Similar ones on ebay go for 150USD.

Items are located in Canada. Canada Postal employees are on strike at the moment, so shipping either through Purolator Or UPS.

Shipping insurance is extra.

2  Other / CPU/GPU Bitcoin mining hardware / 5830's back in stock Newegg on: June 16, 2011, 09:46:04 PM

Got 6
3  Other / CPU/GPU Bitcoin mining hardware / Good Speeds on Sapphire 5830's 311.4MHash/s on: June 05, 2011, 06:18:53 AM
Hey I was just curious if anyone has pushed their 5830's over the 311MHash/s Mark.

I have two Sapphire 5830's

Core Clock: 1000MHz
Memory Clock: 320MHz
Average Temp : 60-66C Depending on the Time of day.

Getting 311.4->311.89 using Pheonix Miner in Win7 without Aero

Pheonix settings.

4  Bitcoin / Mining / Miner Build x2 on: May 26, 2011, 07:39:41 AM
Building 2 new rigs as a short term investment while the difficulty rate for mining is still someone feasible

Here is the setup, wondering if anyone has some positive tips on the hardware before I click the buy button.

Motherboard - ASRock 890FX          
CPU             - AMD Sempron 140     
RAM            - Kingston 1GB 240-Pin 
GPU(s)         - 3xPowerColor AX6870
PSU(s)         - 2xhec X-Power Pro 600

Thank god for a nice tax return,
I plan on building 2 of these rigs.

Total Rig Cost $976.31 Shipped
Grand Total $1952.61

With an overclock on those 6870's I should be able to force about 450MHash's out of the cards, hoping to average
2.5-2.7 GHash/s

Any tips or suggestions would be much appreciated.

5  Bitcoin / Mining / Sapphire 5830 Memory clock < 550 Issue on: May 26, 2011, 07:02:34 AM
After a couple days of reading, and messing around mining with my nVidia Refference 8800GT and MSI Twin-Frozr 250GTS I decided to make a small investment into mining bitcoins.

I found a dam good deal on Newegg for Sapphire Radeon HD 5830 and tired of seeing my crappy 70MHash/s out of my overclocked nVidia Cards, I took the plunge and got 2 of the 5830's.

Figured may as well, even if I don't make anything back, I still got a decent pair of cards to run in XFire.

Current Setup
GA P55-USB3 Motherboard
Intel i5 720
2x Sapphire Radeon 5830's ( not x-fired )
2x Craptastic 550W PSU's

GuiMiner (poclbm)'s MinerPool

Installation of the cards running stock, gave me about 200-216 MHash/s each
   - POCLBM Flags ( -v -w128 )

I tuned the cards using ATITrayTool

I have been running the cards stable at 985/600 for 3 Days, using POCLBM Flags ( -v -w64 -r2 -f1 ) and getting 300-306MHash/sec
The fans are running at 100%, and I have a box fan blowing into the open case ** Yes sounds like a jet engine **

GPU Temps sit around 60-63C

I'm trying to figure out how on earth some of the 5830 users are getting their memory clocks down to 300. As soon as I go lower then 550MHZ Memory clock, the card crashes.

Any thoughts on why I can't lower my memory clock speeds, or suggestions.

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