Need help picking out a Mobo

This topic is locked from further discussion.

Avatar image for oOiRuL3zOo
oOiRuL3zOo

75

Forum Posts

0

Wiki Points

0

Followers

Reviews: 0

User Lists: 0

#1 oOiRuL3zOo
Member since 2010 • 75 Posts

So im updating my rig a little bit, and I wanted to start by replacing my ASUS M4A77T because I want something with Crossfire. I have a budget of around £130-£140. I am from england by the way so no newegg links please because unfortunatly it's an america only site, which is a shame because it's an amazing site. I was thinking this Mobohttp://www.ebuyer.com/product/221880but it doesn't say it's Crossfire, even though it has 5 PCI-E 2.0 ports, so they might have forgot to mention it's crossfire enabled. Thanks all in advance :).

Avatar image for SoraX64
SoraX64

29221

Forum Posts

0

Wiki Points

0

Followers

Reviews: 12

User Lists: 0

#2 SoraX64
Member since 2008 • 29221 Posts
How's this look?
Avatar image for oOiRuL3zOo
oOiRuL3zOo

75

Forum Posts

0

Wiki Points

0

Followers

Reviews: 0

User Lists: 0

#3 oOiRuL3zOo
Member since 2010 • 75 Posts
How's this look?SoraX64
the second PCI-E 2.0 port is only x4 speed and the first port is x16, wont the second port slow down the Crossfire process?
Avatar image for hartsickdiscipl
hartsickdiscipl

14787

Forum Posts

0

Wiki Points

0

Followers

Reviews: 10

User Lists: 0

#4 hartsickdiscipl
Member since 2003 • 14787 Posts

[QUOTE="SoraX64"]How's this look?oOiRuL3zOo
the second PCI-E 2.0 port is only x4 speed and the first port is x16, wont the second port slow down the Crossfire process?

It depends on what kind of GPUs you put in that rig. This article shows that an x4 slot only slows down a 5870 by 5 to 8%.

http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/

I think one of these budget Crossfire mobos with the 2nd x4 slot would be great for a pair of 6850's.

Avatar image for oOiRuL3zOo
oOiRuL3zOo

75

Forum Posts

0

Wiki Points

0

Followers

Reviews: 0

User Lists: 0

#5 oOiRuL3zOo
Member since 2010 • 75 Posts

[QUOTE="oOiRuL3zOo"][QUOTE="SoraX64"]How's this look?hartsickdiscipl

the second PCI-E 2.0 port is only x4 speed and the first port is x16, wont the second port slow down the Crossfire process?

It depends on what kind of GPUs you put in that rig. This article shows that an x4 slot only slows down a 5870 by 5 to 8%.

http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/

I think one of these budget Crossfire mobos with the 2nd x4 slot would be great for a pair of 6850's.

I wanna make sure we're on the same page, I mean x4 as in the speed and not the size of the slot, and yes I was going to Crossfire 2 6870's but some told me to wait for the 6890 just incase.
Avatar image for hartsickdiscipl
hartsickdiscipl

14787

Forum Posts

0

Wiki Points

0

Followers

Reviews: 10

User Lists: 0

#6 hartsickdiscipl
Member since 2003 • 14787 Posts

[QUOTE="hartsickdiscipl"]

[QUOTE="oOiRuL3zOo"] the second PCI-E 2.0 port is only x4 speed and the first port is x16, wont the second port slow down the Crossfire process?oOiRuL3zOo

It depends on what kind of GPUs you put in that rig. This article shows that an x4 slot only slows down a 5870 by 5 to 8%.

http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/

I think one of these budget Crossfire mobos with the 2nd x4 slot would be great for a pair of 6850's.

I wanna make sure we're on the same page, I mean x4 as in the speed and not the size of the slot, and yes I was going to Crossfire 2 6870's but some told me to wait for the 6890 just incase.

I wouldn't crossfire 2 cards that are any faster than a 6850 in a board with an x4 slot as the secondary. Yes, I know the 2nd PCI-E slot is a full-length slot, but running at x4 speed. My motherboard has the same. Since the 6870 is only a bit slower than a 5870, and we can see the 5870 losing a bit of performance over the x4 bus, I'd have to assume that the 6870 would lose a similar percentage of performance. The 6850 seems to fall right on the line where you wouldn't lose much performance. That's just my interpretation of the numbers. If I were going to buy a pair of 6870's ($240 US each), I'd probably get a motherboard that would run both cards at either x8 or x16.

Once again, that's just what I would do. I'm sure the x4 slot won't be a massive bottleneck to the 6870's.

Avatar image for oOiRuL3zOo
oOiRuL3zOo

75

Forum Posts

0

Wiki Points

0

Followers

Reviews: 0

User Lists: 0

#7 oOiRuL3zOo
Member since 2010 • 75 Posts

[QUOTE="oOiRuL3zOo"][QUOTE="hartsickdiscipl"]

It depends on what kind of GPUs you put in that rig. This article shows that an x4 slot only slows down a 5870 by 5 to 8%.

http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/

I think one of these budget Crossfire mobos with the 2nd x4 slot would be great for a pair of 6850's.

hartsickdiscipl

I wanna make sure we're on the same page, I mean x4 as in the speed and not the size of the slot, and yes I was going to Crossfire 2 6870's but some told me to wait for the 6890 just incase.

I wouldn't crossfire 2 cards that are any faster than a 6850 in a board with an x4 slot as the secondary. Yes, I know the 2nd PCI-E slot is a full-length slot, but running at x4 speed. My motherboard has the same. Since the 6870 is only a bit slower than a 5870, and we can see the 5870 losing a bit of performance over the x4 bus, I'd have to assume that the 6870 would lose a similar percentage of performance. The 6850 seems to fall right on the line where you wouldn't lose much performance. That's just my interpretation of the numbers. If I were going to buy a pair of 6870's ($240 US each), I'd probably get a motherboard that would run both cards at either x8 or x16.

Once again, that's just what I would do. I'm sure the x4 slot won't be a massive bottleneck to the 6870's.

Woops sorry I meant 6970, and yea I see what you mean. But if I were to just have one 6870 and not crossfire 2 of them should I buy it or still get One/two 6850's?
Avatar image for hartsickdiscipl
hartsickdiscipl

14787

Forum Posts

0

Wiki Points

0

Followers

Reviews: 10

User Lists: 0

#8 hartsickdiscipl
Member since 2003 • 14787 Posts

[QUOTE="hartsickdiscipl"]

[QUOTE="oOiRuL3zOo"] I wanna make sure we're on the same page, I mean x4 as in the speed and not the size of the slot, and yes I was going to Crossfire 2 6870's but some told me to wait for the 6890 just incase.oOiRuL3zOo

I wouldn't crossfire 2 cards that are any faster than a 6850 in a board with an x4 slot as the secondary. Yes, I know the 2nd PCI-E slot is a full-length slot, but running at x4 speed. My motherboard has the same. Since the 6870 is only a bit slower than a 5870, and we can see the 5870 losing a bit of performance over the x4 bus, I'd have to assume that the 6870 would lose a similar percentage of performance. The 6850 seems to fall right on the line where you wouldn't lose much performance. That's just my interpretation of the numbers. If I were going to buy a pair of 6870's ($240 US each), I'd probably get a motherboard that would run both cards at either x8 or x16.

Once again, that's just what I would do. I'm sure the x4 slot won't be a massive bottleneck to the 6870's.

Woops sorry I meant 6970, and yea I see what you mean. But if I were to just have one 6870 and not crossfire 2 of them should I buy it or still get One/two 6850's?

That depends on your budget. Personally I would wait to see how the new 6900 series performs before Crossfiring 2 6800 series cards.

Avatar image for oOiRuL3zOo
oOiRuL3zOo

75

Forum Posts

0

Wiki Points

0

Followers

Reviews: 0

User Lists: 0

#9 oOiRuL3zOo
Member since 2010 • 75 Posts

[QUOTE="oOiRuL3zOo"][QUOTE="SoraX64"]How's this look?hartsickdiscipl

the second PCI-E 2.0 port is only x4 speed and the first port is x16, wont the second port slow down the Crossfire process?

It depends on what kind of GPUs you put in that rig. This article shows that an x4 slot only slows down a 5870 by 5 to 8%.

http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/

I think one of these budget Crossfire mobos with the 2nd x4 slot would be great for a pair of 6850's.

http://www.ebuyer.com/product/196392 That looks really good, around the same price and the second port is 8x and not 4x
Avatar image for hartsickdiscipl
hartsickdiscipl

14787

Forum Posts

0

Wiki Points

0

Followers

Reviews: 10

User Lists: 0

#10 hartsickdiscipl
Member since 2003 • 14787 Posts

[QUOTE="hartsickdiscipl"]

[QUOTE="oOiRuL3zOo"] the second PCI-E 2.0 port is only x4 speed and the first port is x16, wont the second port slow down the Crossfire process?oOiRuL3zOo

It depends on what kind of GPUs you put in that rig. This article shows that an x4 slot only slows down a 5870 by 5 to 8%.

http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/

I think one of these budget Crossfire mobos with the 2nd x4 slot would be great for a pair of 6850's.

http://www.ebuyer.com/product/196392 That looks really good, around the same price and the second port is 8x and not 4x

I say go for it. That's a great board.