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Author Topic: What card to get?  (Read 6820 times)
simpic
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June 18, 2011, 02:05:15 PM
 #21

Sorry for my newbie question, i have never been a gamer or hardware upgrading addicted so i don't know anything about video cards!
I see the hardware comparison page on the BitCoin wiki and i see that ATI 6990 are the best, is it right?
On some rows i see 6990x2 or 6990x3, what do they mean?

Thank you.

Using 2 and 3 cards at the same time.

Ok, thank you.

I make this question because i found on some shops the ATI 6990 and in other shops i see the ATI 6990 X2.
Are they the same card?

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June 18, 2011, 02:55:07 PM
 #22

You couldn't have seen the 6990x2, since it doesn't exist. 6990's are NOT good for mining in terms of euro/MHash or euro/Watt, especially for you, OP. In your situation, I would go for a 5830, you could crossfire it with your 5850 for gaming, and it would be the best value for money you can get. Where are you located, I might be able to help you with prices. I just got 3 5830's in Holland, but there's even better prices in France, Germany/Austria, etc.

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June 18, 2011, 11:07:57 PM
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You couldn't have seen the 6990x2, since it doesn't exist. 6990's are NOT good for mining in terms of euro/MHash or euro/Watt, especially for you, OP. In your situation, I would go for a 5830, you could crossfire it with your 5850 for gaming, and it would be the best value for money you can get. Where are you located, I might be able to help you with prices. I just got 3 5830's in Holland, but there's even better prices in France, Germany/Austria, etc.

In previous posts people told me to buy 5970. Then i asked if two 5870s are better then one 5970. Now you are suggesting to buy the 5830 and use it with the 5850. Then what is the best solution for Mhash/Watt?
I live in Italy...

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June 19, 2011, 12:30:16 AM
 #24

5830s are the most cost effective, but they are hard to find anymore. The 6870 is the next best, since it is only a little more and can go up to 330 mh/s. Only $160 at Newegg this weekend...

Rent my 800 + mh/s rig. PM me!
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June 19, 2011, 03:15:31 AM
 #25

Since you are from europe you might want to look at http://www.overclockers.co.uk/showproduct.php?prodid=GX-168-XF&groupid=701&catid=56&subcat=1711
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June 19, 2011, 11:13:15 PM
 #26

I want the best video card for MHash/Watt and 5970 is ok. I have checked again the comparison table and 5970 should be the best solution.
Am i wrong?

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June 20, 2011, 09:54:34 AM
 #27

I want the best video card for MHash/Watt and 5970 is ok. I have checked again the comparison table and 5970 should be the best solution.
Am i wrong?
No, you're right. 5970 is best in MHash/s/W. I have straight comparison... 5970 vs. 2x5870 vs. 2x6970 and I definitely prefer 5970. If you can buy it, don't hesitate.

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June 20, 2011, 12:36:15 PM
 #28

I want the best video card for MHash/Watt and 5970 is ok. I have checked again the comparison table and 5970 should be the best solution.
Am i wrong?
No, you're right. 5970 is best in MHash/s/W. I have straight comparison... 5970 vs. 2x5870 vs. 2x6970 and I definitely prefer 5970. If you can buy it, don't hesitate.

What could be the right price for it? Tongue

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June 20, 2011, 12:48:49 PM
 #29

Sorry for my newbie question, i have never been a gamer or hardware upgrading addicted so i don't know anything about video cards!
I see the hardware comparison page on the BitCoin wiki and i see that ATI 6990 are the best, is it right?
On some rows i see 6990x2 or 6990x3, what do they mean?

Thank you.

6990s are the best yet at the same time you gottta look at how expensive they are 750ish a piece. The x2 and x3 is relateing to two graphics cards running together or 3
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June 20, 2011, 03:23:02 PM
 #30

A single 5970 can work at 800MH/s according to this.

Yes, and a 5850 can work at 425mhash/s if you OC the core from 725 to 1015mhz and up the voltage by about 30%.
Good for mining if you are setting up a one-week operation.

I hope people don't blindly follow the chart but also use their common sense & think what is a safe 24/7 clock frequency.

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June 20, 2011, 09:24:54 PM
 #31

Why don't you see 6990x4 (only up to 6990x3) while i frequently see 5850x4?

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June 21, 2011, 05:22:46 AM
 #32

No, you're right. 5970 is best in MHash/s/W. I have straight comparison... 5970 vs. 2x5870 vs. 2x6970 and I definitely prefer 5970. If you can buy it, don't hesitate.

What could be the right price for it? Tongue
I bought older one for 250 euro.

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simpic
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June 21, 2011, 08:44:55 AM
 #33

No, you're right. 5970 is best in MHash/s/W. I have straight comparison... 5970 vs. 2x5870 vs. 2x6970 and I definitely prefer 5970. If you can buy it, don't hesitate.

What could be the right price for it? Tongue
I bought older one for 250 euro.

Where? Was it used?

Jack of Diamonds
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June 21, 2011, 12:36:16 PM
 #34

You couldn't have seen the 6990x2, since it doesn't exist. 6990's are NOT good for mining in terms of euro/MHash or euro/Watt, especially for you, OP. In your situation, I would go for a 5830, you could crossfire it with your 5850 for gaming, and it would be the best value for money you can get. Where are you located, I might be able to help you with prices. I just got 3 5830's in Holland, but there's even better prices in France, Germany/Austria, etc.

This keeps being spewed around as if miners are just blindly buying ineffective hardware.

The fact is that the 6990 is a great miner because:

1. It has two GPU's in 1 card
2. If your motherboard has 2 PCI-e slots, you can turn them into 4 gpu's worth of hashing power.
3. If your motherboard has 4 PCI-e slots, you can turn them into 8 gpu's worth of hashing power.

In the case of single core GPU's, you would now have to buy 2 computers with 2 power supplies, processors, motherboards, RAM, casing etc.

So in the end you save space & don't have to buy a second rig to house more cards & you get greater resale value.

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June 22, 2011, 01:46:44 PM
 #35

Why in the comparison table there are different entries for the same card? What is the difference?
And why some of them are colored with different color?

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June 22, 2011, 05:24:35 PM
 #36

Why in the comparison table there are different entries for the same card? What is the difference?
And why some of them are colored with different color?

There is multiple information submitted for the same chips, so they are listed multiple times. It's not multiple listing for the same card.

They need more info, honestly.

Take the Radeon HD 5830, for example.

You can't just list "5830", or even "Sapphire 5830". Sapphire made 3-4 different 5830 cards. Each company that released a 5830 probably made multiple ones as well. Not all cards are made the same. Some are sold overclocked. Some sold at stock speeds overclock more than those sold pre-overclocked. Different cards use different memory. There are lots of differences. Listing JUST the chipset doesn't help.
Some 5830 cards released in 2010 may mostly be reference designs. Maybe bad 5850/5870 chips crippled and sold as 5830s that suck up a lot of power and don't overclock well. Ones released in 2011 have more efficient, non-reference designs. Maybe they are 5850/5870 chips that have simply been sold as 5830 chips because of the demand for 5830 chips, so they run cooler and overclock better.

Chip name, Manufacturer of card, model # (plus revision, if possible), manufacture date, then GPU speed, memory speed, Voltage, Operating System, drivers used, miner used, and command-line switches.
THAT would give you a good idea of what card does what.

Regarding colors of entries ... I have no clue.
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June 22, 2011, 05:51:06 PM
 #37

Why in the comparison table there are different entries for the same card? What is the difference?
And why some of them are colored with different color?

There is multiple information submitted for the same chips, so they are listed multiple times. It's not multiple listing for the same card.

They need more info, honestly.

Take the Radeon HD 5830, for example.

You can't just list "5830", or even "Sapphire 5830". Sapphire made 3-4 different 5830 cards. Each company that released a 5830 probably made multiple ones as well. Not all cards are made the same. Some are sold overclocked. Some sold at stock speeds overclock more than those sold pre-overclocked. Different cards use different memory. There are lots of differences. Listing JUST the chipset doesn't help.
Some 5830 cards released in 2010 may mostly be reference designs. Maybe bad 5850/5870 chips crippled and sold as 5830s that suck up a lot of power and don't overclock well. Ones released in 2011 have more efficient, non-reference designs. Maybe they are 5850/5870 chips that have simply been sold as 5830 chips because of the demand for 5830 chips, so they run cooler and overclock better.

Chip name, Manufacturer of card, model # (plus revision, if possible), manufacture date, then GPU speed, memory speed, Voltage, Operating System, drivers used, miner used, and command-line switches.
THAT would give you a good idea of what card does what.

Regarding colors of entries ... I have no clue.


Thank you for your explanation.
About manufacturers, how do i choose the best one? I see companies like Asus, Sapphire, Power Color, XFX, EVGA and so on for the same ATI chip. Have i just to buy the cheaper one?

HudsonStan
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June 23, 2011, 12:49:41 PM
 #38

No, you're right. 5970 is best in MHash/s/W. I have straight comparison... 5970 vs. 2x5870 vs. 2x6970 and I definitely prefer 5970. If you can buy it, don't hesitate.

What could be the right price for it? Tongue
I bought older one for 250 euro.

Where? Was it used?
Sure. But with remaining warranty until october 2011.

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HudsonStan
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June 24, 2011, 07:34:25 AM
 #39

5830s are the most cost effective, but they are hard to find anymore. The 6870 is the next best, since it is only a little more and can go up to 330 mh/s. Only $160 at Newegg this weekend...
Only in shortterm view. 5830 is worst in Mhash/s/W. It is crippled 5870, so it has power draw of 5870, but only 2/3 output.

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June 24, 2011, 08:31:14 PM
 #40

This keeps being spewed around as if miners are just blindly buying ineffective hardware.

The fact is that the 6990 is a great miner because:

1. It has two GPU's in 1 card
2. If your motherboard has 2 PCI-e slots, you can turn them into 4 gpu's worth of hashing power.
3. If your motherboard has 4 PCI-e slots, you can turn them into 8 gpu's worth of hashing power.

In the case of single core GPU's, you would now have to buy 2 computers with 2 power supplies, processors, motherboards, RAM, casing etc.

So in the end you save space & don't have to buy a second rig to house more cards & you get greater resale value.

This keeps getting spewed around because its true for most people. For the price of one 6990 without a new system, I can get an entire pc with 3 5850s that have better cooling and 50% higher hash rate. Thats only for the 6990 (580 euros minimum). It doesn't matter how many spare slots you have on your mobo, at 750MH for 580 euros, it simply cannot be justified. At all. Not even by power consumption. If you are considering spending 600 euros on mining equipment, I suggest spending 50 more, and buying 2 mobos, psus, cpus, hdds, and 4 5830s or 3 5850s and get 50% more hash rate at only 50% more power consumption.

Also consider noise. If you put a 6990 in your living room/pc room/bedroom, it becomes uninhabitable. A separate rig can be put into your basement or an unused room. Heat generation can also be a problem. My 2 rigs are in a guest room with full open windows 24/7. 3 5830s and a 6950 mining 24/7 generate around 35C ambient in the room, with outdoor temp around 20C. I don't care because I'm not there, but back when it was in my room it used to be really hot.

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