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CF 6870 or single 78xx-7950?

post #1 of 12
Thread Starter 
Slowly building my first pc over the next few weeks buying part by part to replace my current prebuilt 955 system. So far I've gotten the storm trooper and a 1k watt PSU. Plan to grab gpu next followed by Asus crosshair v formula-z with AMD FX4170(no clue how to overclock and its the highest clocked stock CPU) with an h80 or v6gt/v10 cooler and 8gb DDR3 ram. But I'm mostly stuck on which way to go with choosing the best gpu setup, don't know how big of a deal running the new series cards on a pcie2.1 is vs pcie3.0, I've only ever had a Radeon 9550 agp card lol. Plan to play games like skyrim/bf3/witcher 2 etc. Using a single 27" Samsung LED1920x1080 monitor. Kinda wanna go CF 6870 for the look inside case plus performance but not sure if single 78xx+ series would give same performance. Mainly looking at the HIS 7k's to stay with the black/red theme. So if anyone could give some ideas/help I would appreciate it XD thanks in advance.
post #2 of 12
In this situation, one is better then two.

Two 6870's are great performers, but a single 7870 would be a MUCH better choice. A 7950, if you could stretch it, would be the absolute best option! Obviously :/
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post #3 of 12
OP a HD 7950 OC card will easily beat HD 6870 in CF. It will provide the best gameplay experience without any multi GPU issues like micro stuttering. Also games in which CF scaling is poor or working CF profiles are not available, the HD 6870 CF will be much slower than HD 7950 OC. Always get the fastest single GPU within your budget. At USD 300 - 330 the HD 7950 OC is the best price perf card in the market.. clock for clock HD 7950 is 3 - 5% slower than HD 7970. HD 7950 (1.1 Ghz) is equal to HD 7970 Ghz(1.05 Ghz) in perf. In the latest DX11 games a HD 7950 at 1.1 Ghz will beat even a HD 6950 CF

http://www.techpowerup.com/reviews/Sapphire/HD_7950_Vapor-X/31.html
http://www.techpowerup.com/reviews/Powercolor/HD_7850_PCS_Plus/9.html

BF3 1920 X 1200 4X AA

HD 6870 - 31.4
HD 6950 - 36.8.
HD 7970 Ghz (1050 Mhz) - 72.3
Sapphire HD 7950 (1135 Mhz) - 74.8

Also as for the CPU going from a Phenom II X4 955 to a FX-4170 is not an upgrade at all. A phenom II X4 955 can be easily overclocked to 3.8 Ghz with voltage tweaking and will beat a FX 4170 in games. If you have a good 970 chipset motherboard and a decent CPU cooler like the Coolermaster Hyper 212 Plus you can easily overclock your CPU and get enough performance to drive a HD 7950 OC . If you want to improve performance over a 955 get an intel core i5 CPU. even a 3 Ghz core i5 will easily beat a 4 Ghz 955 in gaming scenarios.

If you provide a budget and the list of components you want to upgrade i can suggest a good build. thumb.gif
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post #4 of 12
Thread Starter 
Listed what I planned to change, pretty much the entire pc. Rather stick with AMD since I've never had any issues with the CPU's, my current mobo is an Asus board but can't think of the model, only has a single pcie slot and its on DDR2 still. Think the 955 is the OEM version also, I have no clue on how to overclock and ill probably mess it up and fry my computer if I tried to lol.. my 955 is at the stock 3.2ghz plus Intel is quite a bit expensive XD

Planned to go:
Asus crosshair v formula-z
AMD fx4170
Corsair vengeance 1600 DDR3
CM v6gt or corsair h80 cooler(I live in florida)
1-2 SSD drives, for windows/games
Gpu yet to be decided..
I've bought storm trooper case and my 1000w PSU will be here Thursday.
Edited by Aspec89 - 9/19/12 at 9:07am
post #5 of 12
Quote:
Originally Posted by Aspec89 View Post

Listed what I planned to change, pretty much the entire pc. Rather stick with AMD since I've never had any issues with the CPU's, my current mobo is an Asus board but can't think of the model, only has a single pcie slot and its on DDR2 still. Think the 955 is the OEM version also, I have no clue on how to overclock and ill probably mess it up and fry my computer if I tried to lol.. my 955 is at the stock 3.2ghz plus Intel is quite a bit expensive XD
Planned to go:
Asus crosshair v formula-z
AMD fx4170
Corsair vengeance 1600 DDR3
CM v6gt or corsair h80 cooler(I live in florida)
1-2 SSD drives, for windows/games
Gpu yet to be decided..
I've bought storm trooper case and my 1000w PSU will be here Thursday.

why did you order a 1000w PSU. Only HD 7970 Tri CF or GTX 680 Tri SLI requires a 1000w PSU. Also spending 150 bucks on a case was not needed. Anyway whats done is done.

The components which have the most impact on the system are CPU and GPU. Instead of ASUS Crosshair V Formula-Z and FX-4170 , you can easily get a core i5 3570k and a decent intel Z77 motherboard.

Intel core i5 3570k - USD 215 with rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116504

ASROCK Z75 motherboard - USD 85
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157304

http://www.intel.com/content/www/us/en/chipsets/mainstream-chipsets/z75-express-chipset.html

"Intel Z75 Express Chipset also enables overclocking features of unlocked 3rd generation Intel® Core™ processors."

Also any decent air cooler like the Coolermaster Hyper 212 Plus is more than enough for running a core i5 at 4 - 4.4 Ghz. look at the amount of reviews the card has on newegg. one of the most popular air coolers for core i5 and core i7.

http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065

check out a user running core i5 2500k at 4.3 Ghz and CPU temps below 60c using the hyper 212 plus

http://www.youtube.com/watch?v=4p8VbDEiPZU

As for GPU i will give you both HD 7950 and HD 7970 options

Sapphire HD 7950 950 mhz edition - USD 310 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102991

Gigabyte HD 7950 Windforce (900 Mhz) - USD 310 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125414

Sapphire HD 7970 OC (1 Ghz) - USD 380 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102982

Gigabyte HD 7970 Windforce (1 Ghz) - USD 420 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125413

the gigabyte windforce has the best cooler . sapphire cards come with Dual X cooler which is pretty good.
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post #6 of 12
Thread Starter 
Psu was on sale for 130$ plus I got the case I wanted and liked the most. I rather stick with AMD and as for overclocking I have to clue where to even start with OCing. For mobo I'm sticking with Asus since my older pc has been running fine since 2005 with AMD/Asus mobo. I got a 1000w PSU so I would have no issues with future upgrades if I decide.
post #7 of 12
if you insists sticking with amd, i strongly suggest to go all out and pick up the FX 8120.
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post #8 of 12
Thread Starter 
8120 or 8150? I'd love to overclock but I have no idea how to or what to do or anything, to avoid frying my pc... I know if I go 8150 I'd have to oc it,
post #9 of 12
8120; most of the time, you'll be able to hit the same clocks as the 8150. And while Bulldozer can't beat out Deneb for performance at the same clock speed (the difference is negligible), it can clock MUCH higher. Plenty of guides on BD overclocking on here thumb.gif While I agree that a Z77 and Ivy would be a better choice, even in the long run, there's really nothing wrong with Bulldozer. My Phenom II can game just as hard as my 3930k, and when I do notice a difference, it's too small to really care about.

Have you considered looking at the Marketplace and asking around for good prices on a used P67/Z68 board and a 2500k/2600k? I know I sound like a broken record, as well as others here, but Intel isn't more expensive, and offers better performance in pretty much every single category that matters. My 2c. Get the 8120 tongue.gif
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Little Black Box
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post #10 of 12
Thread Starter 
If you don't mind could you post a good oc guide I can read up on, I have no experience period with oc... So best guide possible please lol currently out of town working and hotel WiFi sucks balls. Wanna read up on it and see how it goes if so I may get a 8120 and oc it, what's the average max stable oc people usually obtain with them?
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