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MSI 7870 OC vs. MSI 6970 Lightning - Page 3

post #21 of 33
Very interesting this HD7870 smile.gif I wanna upgrade to a used MSI GTX580lightning or a New Sapphire HD7870 (OC or GHz) or MSI R7870 TF3 OC .... what do you think guys??
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post #22 of 33
Thread Starter 
I think you're better off selling it and getting a GTX680. A 7870 is as good as a GTX580, not faster as far as I know. It'll become a downgrade to get a 7870.
post #23 of 33
6970 (HIS 900 MHz/1400) OC edition overclocked to 955/1455 beats HIS 7870 (1000 MHz/ 1200 MHz), in one screen display and dual screen (almost equal) but 6970 really destroy 7870 when AA x 8 is engaged

( dual monitors 1920 x 1200) all settings maxed out played DIRT3 on one monitor while monitoring stuff on the second one.

So just like some of them said 7870 is the successor of 6870 not the 6970
the successor of 6970 is 7970
that explaining the poor performance of 7870 on higher resolution when AA above 4 is engaged

I am wondering where those people on the reviewing website are coming up with those benches from : making 7870 outperforming 6970 in all tests which is far from the reality.

I own 2x 6870 (1 GB and 2GB versions) and recently bought 2 HIS 6970 and 7870 and I can assure you that the most powerful and quieter card is 6970 hands down. (6870 X2 cros fire is obviously the most powerful setup, but for some reason I got less scaling ( 98% max , average 60%)than some gamers did with just 2 x 6850 = 100 % scaling at all times on single screen): might be due to the presence of 2 monitors or because of the difference of VRAM (1GB and 2 GB cards) ???

6970 can run Dirt 3 game at 1920 x 1200 all maxed out with 24xAA and get 60 FPS while watching a movie and browsing and monitoring performance on the second 1920 x 1200 screen : a real beast !

7870 runs much cooler for the performance which is close to 6970 until the 4 Anti aliasing limit is passed.
going from 6970 to 7870 IS NOT AN UPGRADE,
Edited by RoGDoM - 10/14/12 at 5:05pm
post #24 of 33
At stock, the 7870 edges out the 580. 6970 isn't in the same league. Overclocked, it matches and edges out the 7950 in some some scenarios. I'd go for the this: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127681&Tpk=Hawk%207870
post #25 of 33
Quote:
Originally Posted by RoGDoM View Post

6970 (HIS 900 MHz/1400) OC edition overclocked to 955/1455 beats HIS 7870 (1000 MHz/ 1200 MHz), in one screen display and dual screen (almost equal) but 6970 really destroy 7870 when AA x 8 is engaged ( dual monitors 1920 x 1200) all settings maxed out played DIRT3 on one monitor while monitoring stuff on the second one. So just like some of them said 7870 is the successor of 6870 not the 6970 the successor of 6970 is 7970 that explaining the poor performance of 7870 on higher resolution when AA above 4 is engaged 7870 runs much cooler for the performance which is close to 6970 until the 4 Anti aliasing limit is passed. going from 6970 to 7870 IS NOT AN UPGRADE,

What games did you check other than Dirt 3 . Try DX11 games like BF3 at Ultra 4x MSAA, Crysis 2 DX11 Ultra 4x MSAA with high res textures, Batman AC DX11 Extreme 8x MSAA.

HD 7870 at stock will beat HD 6970 at stock. Overclocked HD 7870 will be even more faster as HD 7870 can hit 1.2 ghz on average and 1.25 - 1.3 Ghz in the best cases.

http://www.techpowerup.com/reviews/Powercolor/HD_7870_PCS_Plus_Vortex_II/8.html
http://www.techpowerup.com/reviews/Powercolor/HD_7870_PCS_Plus_Vortex_II/30.html

1920 X 1200 4X AA
HD 6970 - 40.3
HD 7870 (1 Ghz) - 49.5
PCS+ HD 7870 (1.15 Ghz) - 55.3
PCS+ HD 7870 (1.245 Ghz / 6 Ghz memory ) - 61.3
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post #26 of 33
A 7870 would be a nice upgrade, considering that you overclock your 7870. However, a 7950 would be a much better deal.
post #27 of 33
Thanks guys for the interest and the prompt replies.
I have checked the benchmarks on the links you pointed to, pretty instructive, I was about to install windows 8 on a new 240 GB SATA III SSD to further test and compare the cards ( 6970 vs 7870) but just messed up my mobo (Asus crosshair formula V) bios, did a false maneuver while trying to update it[tried to include a top model sexy photo as a boot up screen:))smile.gif , sad stuff if jumper clear CMOS won't work this high end mobo doesn't have any bios crash recovery automated option (like laptops do : reinstalling bios from scratch automatically form usb or cd or floppy after hitting a specific emergency keyboard combination on boot), software bios cras hrepair works only when bios still posts, which is not my mobo case... Asus customer support = useless, just ordered a bios chip ( nice surprise discovered that this board has a detachable bios chip) from Ebay while waiting for a complete board RMA.
Edited by RoGDoM - 10/22/12 at 6:52am
post #28 of 33
Finally Got my replacement Motherboards ASUS CHFV ! with the latest bios loaded, AMD FX 8150 OC stable @ 4.6 GHz, DDR 2133 8 GB @ 2188 Mhz, fresh install of win ult 64 bit on 240 GB SSD agility III sata III( 550/500 R/w speeds),
new benchmarks on fresh install:
tested His 6970 900/1400 OC to 955/1455 in single mode and CFiRE (2x 6970)
His 7870 1000/1200 OC to 1188/1444 stable (with fan curve maxed out + temps monitoring), could run @ 1200/1500 but crashes sometimes especially with crysis2

- PAssmark performence test gives 4700 points to 7870 while 6970 gets 3200 and 3700 points in CF (superior GPGPU computing for 7870)
- SIS SANDRA gives better score to 6970 overall (beandwith etc) but 7870 still wins in computing power.

in dual monitor setup 1920 x1200 gaming on one monitor, monitoring on second one : 7870 gets almost same FPS as 6970 but game play seems altered and not smooth (dirt3 Ultra setting AAX4) AMD control center all settings maxed out.
@ 8 AA 6970 destroys 7870 with at least 20 FPS difference. (game in ultra setting)
they have comparable performance @ x4 in High game setting, 7870 is much powerful in computing ops (benchmarks better) and runs 10 to 15 degrees cooler and have more power managing features.

It's just so sad the AMD cross fire scaling is so hectic, is it on purpose for marketing reason?
Issues with GPU usage Low GPU usage: HIS 7870 (oc @ 1188/1444 stable with fan curb maximized to keep below 50 degrees celsus), getting 100% GPU usage when dirt3 game is loading but falls back to 80 or 60% ! found that rebooting win 7 ult 74 or sometimes or just relaunching the game unlocks it ?!

HAd same issue with 2 x 6970 2GB Oc 955/1455 where I was getting low frame rate ( around 70 FPS with 60% GPU use during game play but 100% GPU use when game loading) but was getting 100% all the way GPU use is one Card is used.

Almost sold my 7870 to keep only one 6970, but fresh system install showed 7870 performing better, 6970 Crossfire scaling found to be lower than previously owned 6870 in crossfire.

CrossFire scaling seems to improve when running 2 monitors of 1920 x 1200 in eyefinity mode. = 3840x1200
Not much framerate drop in for a single card (6970) going from 1920x1200 to 3840x1200 !

All strange stuff with AMD: giving up for good on the crossfire: lot of headache, noise and heat for poor scaling for regular 1 monitor resolution, not worth it : something is wrong somewhere in the drivers.

Moreover when 2 cards are installed, and crossfire is not enabled (since each card is connected to a separate monitor) : there is NO POSSIBILITY FOR AMD GPUs to spread the GPU load among both cards: all the stress FALLS ON the graphic card assigned for the MAIN MONITOR : very sad !: EVEN IF YOU TRY TO SPREAD GRAPHIC INTENSIVE APPS AMONG BOTH MONITORS (dragging apps from monitor to the other in extended desktop) issue that doesn't seem to be present with NVIDIA CARDS that also does not require all monitors to be connected through MAIN card for SLI to be active.

Strange and sad frustrating stuff with AMD high end cards but still performance/price ratio is great.
Edited by RoGDoM - 1/29/13 at 1:58pm
post #29 of 33
The smoothness (or stutter) issue you're describing is more driver related.
It's an issue that exists w. 12.11 Betas / 13.1s and should be corrected w/ 13.2s when officially released (not that current beta).

That 7870 likely has a bunch of headroom even w/ stock volts.
YMMV of course, but a lot of people are able to hit 1200MHz on the core w/o any kinda of bump.
Edited by candy_van - 1/29/13 at 2:04pm
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Stugots III
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post #30 of 33
Quote:
Originally Posted by candy_van View Post

The smoothness (or stutter) issue you're describing is more driver related.
It's an issue that exists w. 12.11 Betas / 13.1s and should be corrected w/ 13.2s when officially released (not that current beta).

That 7870 likely has a bunch of headroom even w/ stock volts.
YMMV of course, but a lot of people are able to hit 1200MHz on the core w/o any kinda of bump.

I Think I am running the 12.11 I'll try the 13.1 soon, the lack of smoothness with 7870 while FPS is good (60 ) is comparable to the effect of 6970 game play with high resolution game capture through manycam (desktop live streaming chat software) , disappears when the second monitor is not active, and most of the times is neglige able after a system reboot. Maybe due to heat as 7870 or 6970 get 10 degrees Celsius temp rise when hooked to dual display.

And yes 7870 hits easily 1200 MHz core clock especially when hooked to a single monitor and with the Vram at default clock : I managed to get a relatively stable 1200/1450 Core /Vram on single monitor 20 mVolts bump and maximum cooling (fan at 100% ) maximum temp = 52 degrees.
stable on dual display @ 1188/1444 max temp 52 , stable with crysis2 at 1155/1444.

I m a sure the card could do a lot better with good cooling I agree with you as I have a tiny inWin buc PC case(that I am keeping because of the x4 sata hot swap feature) with overclocked CPU etc and tough to cool.
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