I like HardOCP's methods because they list EVERY setting and what its at, a lot of other places just test AA and AF. Which I think is dumb especially since there are lots of other performance factors involved.
-
Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!
Come get your 4870 Review's =D
- Thread starter ChristmasGT
- Start date
I like HardOCP's methods because they list EVERY setting and what its at, a lot of other places just test AA and AF. Which I think is dumb especially since there are lots of other performance factors involved.
- Joined
- Aug 24, 2007
I didn't read EVERY review, but I did read a few, and there's a few things I'd like to see relating to crossfire. I didn't see any 4850 crossfire vs 9800GX2 tests that included OCing, and didn't see any 4870 crossfire vs 9800GTX tri-SLI tests at all (same price point)...
[H] had really poor OCs on the 4k series cards, hopefully that isn't the case for all cards.
I will agree with you on that one.
For a start, it's not KFA, it's Galaxy, KFA is just like Nvidia's "Geforce". Galaxy are owned by Palit who are a very reputable brand. At least my 8800GT doesn't have the shoddy Qimonda memory that EVGA/XFX etc put on theirs, and even better, it doesn't heat up to 90c.
Last edited:
- Joined
- Dec 30, 2003
- Joined
- Nov 26, 2005
- Location
- Concord, NC
I've had several 8800's in both the GT and GTS varieties, and even w/ a volt mod they don't get that hot on the stock cooler as long as you use the fan adjustment. At this moment the fan speed is very difficult to adjust on the 4850, but don't worry...I'll find a way!
eVGA, XFX, etc do not put the memory on the cards. I think it's Flextronics who does all the reference board builds. After a certain point in time all new reference boards switched to Samsung.
I'll agree that Palit has a solid reputation, though.
What I mean is they follow the refernence design, not improving on anything, and their are things that could be improved.
I had a reference XFX, and it ran pretty hot, but it was one of the first, the newer HSF has a larger fan, does it not. My XFX topped out at 700/1750/2000 even with the BIOS Vmod, I got this GT for cheaper and it is better in every way.
Anyway, back to the thread topic, does anyone know what speed the HD 4870's
GDDR5 is rated at?
- Joined
- Aug 5, 2002
Yes the 4870's memory is 900Mhz or 1800Mhz or 3600Mhz if you want to look at it in one of those ways.
- Joined
- Nov 28, 2001
- Location
- in a magical field
Those changes, the fan and memory, were reference changes or spanned across seller brands. It has nothing to do with one of them improving the design since it sounds like they were all reference designs at the time they were made.
- Joined
- Nov 26, 2005
- Location
- Concord, NC
I want to say 4GHz effective (2GHz actual), but don't quote me on that.
- Joined
- Aug 5, 2002
Well people are hitting 1150 on the modules so they probably are rated higher than that.
So thats either 1150, 2300, or 4600Mhz Actual.
- Joined
- Jun 11, 2008
- Location
- San Diego, CA
I'm going with a 4850 because I'm also upgrading to quad. What do you guys think-
Q6600
Gigabyte P35-DS3R
3gb DDR2 800 (Have 2 now, buying another 1gb dimm)
Visiontek 4850
What I plan on playing-
Halo 2, TF2, CS:Source, Gears of War, Call of Duty 4, Bioshock
What I also plan on doing-
Photoshop work, workstation work really, building a website, writing. The quad is for that stuff, photoshop and website design really. I wanna multi task it.
Q6600
Gigabyte P35-DS3R
3gb DDR2 800 (Have 2 now, buying another 1gb dimm)
Visiontek 4850
What I plan on playing-
Halo 2, TF2, CS:Source, Gears of War, Call of Duty 4, Bioshock
What I also plan on doing-
Photoshop work, workstation work really, building a website, writing. The quad is for that stuff, photoshop and website design really. I wanna multi task it.
- Joined
- Aug 5, 2002
You have 3 Gigs currently? Right now your memory is not running optimally due to the split 2 and 1 Gig stick setup. Still think it would run dual channel but not as effectively. If you put a third stick in your going down to single channel and you will really drop performance on the memory. If you want ideal get another 2gig stick and sell the 1 giger.
- Joined
- Nov 26, 2005
- Location
- Concord, NC
Where are you getting 3 speeds from?
Is it QDR?
Afaik it's actually running 2300MHz, and it's effective speed is twice that since it's GDDR, so 4.6GHz.
My DDR-800 (rated at 400MHz) runs at DDR-1200 (600MHz) speeds, so I don't see your point.
- Joined
- Nov 26, 2005
- Location
- Concord, NC
How is that possible? DDR uses the rising and falling edge of the clock cycle to get double data rate. How do you get quad data rate?
And everything I've read says GDDR5, not GQDR5.
- Joined
- Jul 21, 2006
- Location
- CYYZ Pearson
DDR =/= QDR?
The 4870 is 1800MHz = 3.6GHz effective.
But they're 4GHz chips, the slowest from QMonda.
- Joined
- Nov 26, 2005
- Location
- Concord, NC
As Deathman pointed out you want 2x1GB, 4x1GB, or 2x2GB. Other configurations may actually slow you down.
- Joined
- Nov 26, 2005
- Location
- Concord, NC
DDR =/= QDR?
The 4870 is 1800MHz = 3.6GHz effective.
But they're 4GHz chips, the slowest from QMonda.
That's what I thought.
I'd still like to hear how QDR is even possible...
- Joined
- Aug 5, 2002
Where are you getting 3 speeds from?
Is it QDR?
Afaik it's actually running 2300MHz, and it's effective speed is twice that since it's GDDR, so 4.6GHz.
My DDR-800 (rated at 400MHz) runs at DDR-1200 (600MHz) speeds, so I don't see your point.
Actually the GDDR5 that ATI is using is quad data rate so QDR. Its shown on the card as 900Mhz stock clock, yet its effective DDR3 speed is 3.6Ghz so overall if you want to be get dirty and "match" it to ddr3 thats where the 2.3Ghz comes from or the 900Mhz which ever you want to consider.
