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6870 vs GTX 470?

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  • New Build
  • Systems
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Last response: in Systems
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October 31, 2010 6:39:25 AM

Hey everyone,

I'm a bit stuck as to which mobo and gpu combo I will be choosing for my new build. I am planning on ordering this as soon as possible. Any advice, help, suggestions, etc would be great.

Thanks!


Motherboard and Video Card:
MSI NF980-G65 AM3 NVIDIA nForce 980a SLI HDMI ATX AMD Motherboard
AND
MSI N470GTX Twin Frozr II GeForce GTX 470 (Fermi) 1280MB 320-bit GDDR5
(Future SLI setup)

OR

MSI 890FXA-GD70 AM3 AMD 890FX SATA 6Gb/s USB 3.0 ATX AMD
AND
MSI R6870-2PM2D1GD5 Radeon HD 6870 1GB 256-bit GDDR5
(Future Crossfire Setup)


Processor:
AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz


Processor Cooling:
Scythe (Mugen) SCMG-2100 Sleeve CPU Cooler


Memory:
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600


Power Supply:
COOLER MASTER Silent Pro RSA00-AMBAJ3-US 1000W


Primary Hard Drive:
SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s


Optical Drive:
LITE-ON 24X DVD Writer Black SATA Model iHAS-324-98


Case:
SILVERSTONE RAVEN RV02


Operating System:
Microsoft Windows 7 Professional 64-bit 1-Pack for System Builders - OEM


Thermal Compound:
Arctic Silver 5 Thermal Compound - OEM

More about : 6870 gtx 470

October 31, 2010 9:35:45 AM

I prefer running crossfire on AMD so I'll put my vote in for that. Unless you want to use CUDA or something ATI will be better.

The 6870 performs similar but scales better in CF giving it a good lead over the 470s. The 470s also draw more power which means a bigger PSU.

Why are you getting a 1000W? Also from a dodgy brand. You'll be running at about 35% load maxed which means you'll get poor efficiency. Get a quality 650W if your getting the 6870s and you will be much better off.

You could replace the board with a 890GX as the FX has x16/x16 crossfire which is not needed unless running more then 2 cards. x8/x8 is perfectly fine for anything less then 2 5970s.
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October 31, 2010 1:44:36 PM

+1 on the 6870 vote

or if you wanna save get a 6850 and clock it to the 6870 speeds the 6850 are amazing overclockers
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October 31, 2010 7:16:57 PM

Thank you guys. This is a hard choice. I would like to do SLI, but I don't know if its really worth getting the old 980a motherboard rather than going with the newer 890fx and the 6870s.

The primary game I will be playing is WoW. I know it doesn't require much, but I want it to last me a few years and I may be playing FFXIV, SWTOR, and I will probably buy SC2 as well.

If anyone else has any advice please let me know. I'd like to order by tonight.

Also, what are the best brands of power supplies if the Cooler Master ones aren't any good??
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October 31, 2010 7:26:06 PM

kemel said:

Also, what are the best brands of power supplies if the Cooler Master ones aren't any good??


Corsair & XFX
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October 31, 2010 8:18:02 PM

get a 6850 then and overclock it and get the 890GX or FX mobo the 980a SLI is meh
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October 31, 2010 8:52:57 PM

Why do you want to run SLI? Your performance needs are low so a single nVidia card would suffice which is better then two cards.

The 6850 looks like your best choice though the 5850 has a large rebate on and comes to only $200 which I think puts it at the best option. Oh just realized the rebate expired today, slack!

I'd go for the 6850.

PSUs that are good are Corsair, Antec, Seasonic, XFX, some OCZ, etc. Would you like me to recommend?
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October 31, 2010 9:33:43 PM

Yeah. I realize those games don't require much, but in the future I may want to try some other stuff and would like to have good performance. I don't plan on doing SLI or Crossfire right away. I would just like to have the capability. The choice of motherboard between the two I listed determines if I do SLI or Crossfire and I'm just trying to figure out the better route between the two.

And yes that would be great if you could recommend some! Thank you!
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November 1, 2010 1:40:45 AM

I really think you should go with the ATI. Less power, similar performance better crossfire scaling.

Also you list the 890FX where as the 890GX would be fine as it has x8/x8 XFire which is all you need.

A PSU for the 6870/50 would be around 600W. Getting the 470s you'd probably have to go for 700/750.

The following 600W PSU will be around the best buy you can get. Dammit it the rebate exspires on the 31st. Oh well :( . I was talking about the OCZ StealthXstream II 600W.

Theres the Antec TP-650 for $100 here, its also modular:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Then theres a nice Roswill one for only $60 though and I will reccomend this over the antec. It ranked number 2 same as the Antec which means:
"*Rank 1 never has more than 5 units in a given power range, and is the best.
*Rank 2 has PSUs that are almost as good as those in rank 1. Maybe they were bumped out of rank one, or maybe they were placed there because of similarities to former rank 1 units.
*Rank 3 has PSUs that are good, passing all tests, but not remarkable, or with minor flaws. "
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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November 1, 2010 1:51:03 AM

^The Rosewill PSU you listed only has two PCI-E connectors (I personally wouldn't trust two molex to PCI-E off the same PSU); if you plan to CF, you will need two per card (assuming 6850/70). With that requirement in mind, the Antec would be the best choice.
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November 1, 2010 5:29:41 AM

Ah thanks for pointing that out. That would be a killer PSU for $60 if it did, looks like I need to watch out for that a bit more. Whats wrong with running 2 adapters?
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November 1, 2010 1:52:11 PM

Each normal (6-pin) PCI-E connector is rated to supply up to 75 Watts, which means one adapter will pull up to 75 W. If you run two simultaneously, you're running up to 150W over one pin of the molex (we only care about the 12V line here, since that's all the graphics card uses). Molex is only rated to carry up to 11 amps per pin (this translates to 132 W), but besides the graphics card, you may also have some fans and possibly LEDs being powered too, which we'll say collectively draw 12 W. That leaves 120 W to power 150 W, which is beyond the molex spec (that can cause random shutdowns in good PSUs, or electrical fires in ones that don't properly regulate their power usage).

Source: http://en.wikipedia.org/wiki/Molex_connector
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