AMD To Launch Radeon HD4890 "RV790" In April

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03-25-2009, 12:21 PM
Vit^pr0n

This is the same length as the 4870 right? :confused:
03-25-2009, 12:24 PM
SNiiPE_DoGG

yes same length

@largon, yeah I noticed that too, if the cards I buy dont have 8-pins already I will be adding them on :)
03-25-2009, 12:51 PM
ILikeCosmosS

as long as they have non refrence design water blocks i going to get that then
03-25-2009, 01:02 PM
Manicdan

Quote:

Originally Posted by SNiiPE_DoGG

yes same length

@largon, yeah I noticed that too, if the cards I buy dont have 8-pins already I will be adding them on :)

is it possible to splice the wires to get the same effect of 8pin? and i know someones gonna tell me thats stupid cause the wires may be stressed with too much heat, but your talking to someone who connected a 226W peltier via molex connector and never had a problem.
03-25-2009, 01:13 PM
SNiiPE_DoGG

Quote:

Originally Posted by Manicdan

is it possible to splice the wires to get the same effect of 8pin? and i know someones gonna tell me thats stupid cause the wires may be stressed with too much heat, but your talking to someone who connected a 226W peltier via molex connector and never had a problem.

well you could solder wires to the board then plug the ends into the pins 7 and 8 on the PCI 8-pin connector... thats how I would do it if I couldnt get an 8-pin female port.
03-25-2009, 01:18 PM
ToTTenTranz

I don't get the point of the 8-pin connector..

The extra 2 pins are just two extra grounds that are actually short-circuited with the original ground pins, in the cable itself. At least that's how they do it in my Corsair.
03-25-2009, 01:21 PM
trinibwoy

Yeah, it doesn't really make sense from a transport perspective. The only reasonable explanation I've heard is that the contacts may get too hot carrying all that current so they need to distribute the load a bit so they don't break down.
03-25-2009, 01:27 PM
Manicdan

heat is the real issue from my understanding, which is based on hobbies and a highschool electronics class. the wires have limits due to the plastic shielding that will melt when too hot, however the wires inside the card can probably handle a much higher heat load and is not nearly limited. but i dont know exactly what happens to wires that have too much current applied, i dont know how quickly before the copper is damaged.
03-25-2009, 01:28 PM
Carfax

Quote:

Originally Posted by perkam

Jumping the gun = stupidity. No one is getting official drivers before April.

Perkam

How much performance is expected from the Cat 9.4 drivers?
03-25-2009, 01:53 PM
SNiiPE_DoGG

8-pin adds an extra 75w of power.... (available)
03-25-2009, 03:06 PM
ColonelCain

I am going to reserve my judgement on the numbers until the cards are tested with CCC 9.4.

Quote:

Originally Posted by largon

That 8pin plug is not soldered onto the board. Pads are empty.

:fact:

Only boards you will see with 8pin+ 6pin are non-reference.

iandh, any idea if your current 4870 sinks will fit the 4890? I'm almost ceartain that the memory sink will, but I am unsure about the VRM sinks.
03-25-2009, 03:08 PM
Manicdan

let see some naked pics to verify the goods are well placed
03-25-2009, 03:10 PM
NapalmV5

if i could order the 2gb 4890 today be an even more dulce today
03-25-2009, 03:11 PM
Eastcoasthandle

Quote:

Originally Posted by SNiiPE_DoGG

8-pin adds an extra 75w of power.... (available)

Wasn't that part of the PCIe 2.0 spec?
03-25-2009, 03:14 PM
SNiiPE_DoGG

Quote:

Originally Posted by Eastcoasthandle

Wasn't that part of the PCIe 2.0 spec?

yeah but PIC-E2 + 6-Pin + 6-pin = 150+75+75 = 300W - PIC-E2 + 6-Pin + 8-pin = 150+75+75+75 = 375W IIRC
03-25-2009, 03:27 PM
ILikeCosmosS

so basically if there two 6 pins then it takes about 300 if there is 6+8 pin it takes 375?
thx that means my tri fire wont be able to get handled on my enermax 1050
03-25-2009, 03:30 PM
Manicdan

no card uses that much, its just the cap. i think the card will be about 200-225W
03-25-2009, 03:46 PM
Glow9

Are these coolers the same as the 4870s or have there been any design upgrades? ATI hasn't exactly been running all that cool with its high end models lately so I'm curious if these are marketed to OC a lot how many of these will be dieing in droves.
03-25-2009, 03:46 PM
SNiiPE_DoGG

Quote:

Originally Posted by ILikeCosmosS

so basically if there two 6 pins then it takes about 300 if there is 6+8 pin it takes 375?
thx that means my tri fire wont be able to get handled on my enermax 1050

yeah like dan said above me, thats just the maximum lol....
03-25-2009, 03:48 PM
SNiiPE_DoGG

Quote:

Originally Posted by Glow9

Are these coolers the same as the 4870s or have there been any design upgrades? ATI hasn't exactly been running all that cool with its high end models lately so I'm curious if these are marketed to OC a lot how many of these will be dieing in droves.

actually the ATI cooler is pretty good, its just the retarded fan profile they put on the 4870 that made them run hot ;)
03-25-2009, 04:03 PM
ColonelCain

Quote:

Originally Posted by SNiiPE_DoGG

actually the ATI cooler is pretty good, its just the retarded fan profile they put on the 4870 that made them run hot ;)

I agree. Right now, running F@H on my 4870 @ 850 core, and fan manually set to 46%, not too loud, core is at 78C (with an ambient of 80F).

And I remember a bit back, that someone claimed that there is a third heatpipe on the 4890's sink.
03-25-2009, 04:20 PM
Glow9

Quote:

Originally Posted by ColonelCain

I agree. Right now, running F@H on my 4870 @ 850 core, and fan manually set to 46%, not too loud, core is at 78C (with an ambient of 80F).

And I remember a bit back, that someone claimed that there is a third heatpipe on the 4890's sink.

A 3rd heat pipe would be nice, more importantly non crap paste would be nice too. Too much dicking around taking the cooler off for something that could have been done easy from the start. Keep me posted if it does have another pipe
03-25-2009, 04:22 PM
flippin_waffles

Quote:

Originally Posted by flopper

got to be the best black design I seen ever.
damn good looks:yepp:

Absolutely
03-25-2009, 04:27 PM
LordEC911

Quote:

Originally Posted by ColonelCain

I agree. Right now, running F@H on my 4870 @ 850 core, and fan manually set to 46%, not too loud, core is at 78C (with an ambient of 80F).

And I remember a bit back, that someone claimed that there is a third heatpipe on the 4890's sink.

Yep, that was me. Heard that back before the pictures started showing up...

Quote:

Originally Posted by LordEC911

Not the same cooler, it is an updated cooler.
Suppose to be a 3 heatpipe HS vs the 2 heatpipe heatsink of 4870.

Can see the third heatpipe in this pic and this compared to the 2 heatpipe design of RV770, seen here, here and here.

Edit- Also had heard that they should be using a newer model fan on reference retail cards that perform slightly better as well, airflow and noise, but I haven't seen any proof of that yet other than slightly different numbers on the fans but I can't find good enough pictures for either one.
03-25-2009, 04:36 PM
onethreehill

XFX Radeon HD 4890 pictured, priced and on sale

http://www.tcmagazine.com/images/new...D_4890_01r.jpg

http://www.tcmagazine.com/images/new...D_4890_03r.jpg

Quote:

First to spill the 'real' beans on the Radeon HD 4890, Dutch store Salland is now listing one of the two XFX RV790 cards as being in stock and ready for snatching by impulsive buyers. Available here, at 259.95 Euro, the card is bundled with Tom Clancy's H.A.W.X., and is based on AMD's reference design meaning it features a 55nm RV790 GPU clocked at 850 MHz, 1GB of GDDR5 memory at 3900 MHz, 800 Stream Processors and a 256-bit memory interface ...............

http://www.tcmagazine.com/comments.p...=25423&catid=2

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